Luận văn Nghiên cứu hạ thấp độ biến động và giới hạn phát triển vàng và platin trong một số mẫu địa chất bằng phương pháp phân tích quang phổ nguyên tử

6 1.388 0.023 4 Chl1dng3: Th1!cnghifm Lu(tnanTiin sfV(ttly 62 Bang3.8:PhantichphuongsaimQtye'uto'(m§uphantantho)m§u9B3-2 Trungblob 1.140 PhuongsaiquitrInh,S2=Sa 0.032 16 (PhuongsainQibQcaemu PTN) Phuongsaigiii'acaemu PTN, Sj 0.209 3 PhuongsaiIffymu, Ss 0.092 Phuongsait6ng,So 0.098 2 2 FTN=Sj /S2 =42.7>FLT=3.239 Ke'tIun: Phuongsai t6ngbao g6m hai thanhph'an:thanhph'ando Iffy mu (trongtrudngheJPnay Ia do IueJngdin phantich Iffy quabe nen mu xem nhu kernd6ngnhfft)vathanhph'andoquitrInhphantich.Phuongsaidomu khong d5ngnhfftIachuye'u. Mfiuchu§ncohamIueJngpheduyt 1.21:t0.06ppm.TrQngIueJngphantich Ig Mh HamIueJngAu (ppm) Trungblob BQIch chu§n Bc PTN tan1 tan2 tan3 tan4 tan5 Xtb s Wdo I 0.76 0.82 0.68 0.90 0.74 0.780 0.084 4 2 0.88 0.82 0.86 0.76 0.92 0.848 0.061 4 3 1.35 1.20 1.24 1.20 1.16 1.230 0.073 4 4 0.54 0.56 0.58 0.60 0.58 0.572 0.023 4 Trungblob 0.858 PhuongsaiquitrInh,S2=Sa 0.060 16 (Phuongsa!nQibQcaemu PTN) Phuongsaigiii'acaemu PTN,Sj 0.275 3 ChUdng3: Th1!cnghi?m Lu(inanTitn sl V(it12 63 PhuongsaiIa'ym~u,Ss Phuongsait6ng,So 0.120 0.134 FIN =SI2/S/ =20.9> FLT =3.239 Ke'tIu~n:Phuongsai t6ngbaog5mhai thanhph'an:thanhph'ando Ia'ym~u (trongtrudngh<;1pnayIa dom~uc6h~tyangphantanthoxemnhukhongd5ng nha't)vathanhph'andoquitrlnhphantich.Phuongsaidom~ukhongd5ngnha't Ionhonthanhph'andoqui trlnhphantichra'tnhi~u MftuyangLam f)5ngmangky hi~u9B3-2.TrQngIU<;fngphantich 109 3.2.1.5.Phan tich ray sii'dl.J.ngky thu~tDungluy~n-ha'pthl.J.nguyentii' f)~ d~tdU<;fCgiOih~nphathi~nco 0.1ppmd6i voi qu~ngyangphantan trungbinhco h~tO.lmm(150mesh)da:phai c'anmQtIU<;1ngcant6i thi~u100g. Kythu~tphantichthongthudngnhuha'pthlJnguyenta,h6a-quangph6trongd6 mftudin phai du<;1cphanbuy thanhdungdichd~th1,1'chi~nphep do kh6 c6 th~ th\l'ehi~ndu<;1cvoi 100gda'tda nhuv~y.Va'nd~se cangkh6 khanhon khi g~p yangphantantho>0.2mm.Trongnhfi'ngtruongh<;fpnay,ke'tquaphantichgiUa caefankhacnhausai I~chra'tIOn.HamIU<;1ngcoppmsai I~chgifi'acac I'anphan tichhonkernnhaucokhiWivaichlJcI'an.VI v~y,phuongphapphantichrayd~ xaedinh chinh xae ham IU<;1ngyang c'anphai dU<;1csa dlJng d~tang s1,1'6n dinh cua ke'tqua.Trongphuongphapnay,c6 th~sa dlJngke'th<;1pky thu~tphantichnung luy~n-ha'pthlJ nguyenta d~h~themgioi h~nphathi~n.So d5 phuongphapda: dugenhi~unhaphantichyangnghienCUu[ 32,35,36]du<;fcchotrenhinh3.5L....- ChuO'ng3: Th1!cnghi~m Lu(inanTi€n sf V(itly 64 M~ud'au>=2kg ~ s1ykho ~ Nghi'endSn Imm ., L Lu'uph'anlkg nghi'endSn0.2mm +O.2mm Ray80mesh(0.2mm)vilaxiStvilarayph6i hQpsaochoph'antrenraycon<=50g ., 'Y <=50g,canQbnghi'en dSnO.lmm Can Q2,11y200g nghi'endSn0.074mm PhantichtoanluQng ., ... Phantich nungluy~n Phan tich filing luy~n-HTNT ., TinhkSt ? qua mob3.5:SodBgiacongvaphantichmfiuvangcochuah~tvangtho *Nguyent~cchung Gia cong,xii'Iy tachph'anchuah~tvangtho va ph'anchuah~tvangmill d~phantichriengtheoc1ph~t.[37,68] M~uthl!cdia co trQngluQng>=2.0kgduQcs1ykho va nghi'endSndQh~t Immb~ngmaynghi'entn,lc,trQnd'eu,chiad6i dinh,can lkgva nghi'endSncoh~t ChltO'ng3: ThT!cnghi?m Lu(inanTiensfV(itly 65 O.2mm,ph'ancon1:;tid~hiu. Thvc hit$nphepray, nghi~nph6ih<;5psaDchoph'an trenrayconkhoang<=50g,demnghi~nthemde'ncohC;ltO.lmmthichh<;5pcho phantich filing luyt$n,canchinhxac trQnghi<;5ngQl (g) nay d~phan tich toan It1'<;1ng.Ph'anquaray dU<;5CtrQnd~u,canchinhxac trQnglU<;5ngQ2(g), gian lU<;5c Ity200gnghi~nmill de'ncohC;lt0.074mm,la'y50gho~cit hdnd~phantichfiling Iuy~nho~cfilingluyt$n-ha'pthl,lnguyentit *Tlnhtoanke'tqua HamlU<;5ngyangtrongm~ula: C (ppm)du<;5Ctinhtheocongthuc a.QI +b.Q2c= 1000 Trongd6: hamlU<;5ngyangphantichtrentoankh6iQlla :a (ppm) hamlU<;5ngyangphantichtrenkh6iQ2la :b (ppm) *MQtvai ke'tquaphantichtheoky thu~trenrayduoiray sa dl,lngphudngphaptrenray duoi ray d~phantich cac m~ukhong6n dinhkhi phantichb~ngcac phudngphapha'pthl,lnguyenta thongthuong.Ke't quaphantichchotrongbang3.9.Phantichl~pcacm~unaytrongbang3.10cho thffydQIt$chchu~ntudngd6i giamra'tdangk~van~mtrongphC;lmvi chophep. Bang3.9:Ke'tquaphantichmQtsf{mftutheophuongphapray [40] Ten Ke'tquaphantichthongthuong(g/t) a QI b Q2 C mau L'an1 L'an2 L'an3 L'an4 L'an5 (g/t) (g) (g/t) (g) (g/t) 5E-2 0.14 9.30 0.10 0.65 2.34 6.60 48 1.86 952 2.08 9B3-2 0.76 0.88 1.35 0.54 1.79 2.30 53 1.08 947 1.14 1055/2 0.40 0.12 <0.10 1.02 0.56 1.40 29 0.50 971 0.52 488 1.80 1.50 1.30 0.90 2.20 3.10 42 2.07 958 2.11 71/5 0.20 4.00 4.30 0.20 0.41 8.90 58 1.36 942 1.79 rhu'o'ng3: ThT;tcnghi?m Luq.nanTiln SlVq.tly 66 Bang3.10:DQlch chufintu'dngd6icuamu phantichtheophtidngphapray Ten a QI b Q2 C RSD RSD mau (g/t) (g) (g/t) (g) (g/t) % chophep% 5E-2 6.60 48 1.86 952 2.09 5.70 45 1.71 955 1.89 9.20 18 1.82 955 1.74 9B3-2 2.30 53 1.08 947 1.14 2.60 52 0.94 948 1.03 14 27 0.92 948 0.87 1055/2 1.40 29 0.50 971 0.53 1.30 32 0.62 968 0.64 11 27 0.56 968 0.54 488 3.10 42 2.07 958 2.11 4.00 44 2.52 956 2.59 10 18 2.60 956 2.49 71/5 8.90 58 1.36 942 1.80 8.20 50 1.20 950 1.55 13 27 1.48 950 1.41 Ch1i(Jn~!I:Th{tcnghi?m LuQnanTitnsfVQtly 67 3.2.2.Di'eunhi~td'aud6t DStangHnh6ndinhcuaketquaphantich,ngoaicacvin d~lienquailden mfiu,conphaiHnhdensv6ndinhtrongphepdotrenmay.Phuongphaphip thv nguyentli'ngoaivi~csli'dvng10graphitedSdovi lu<;5ng,concophuongphap ngc,mlli'asli'dvngh6nh<;5pkh6ngkhi-acetyleneho(lcN2O-acetylenedSdo nhung hamlU<;5ngcoppm.Svmit 6ndinhcuaph6hip thvtheothaigiantrongphuong phapngQnlli'ala dangkSdonhi~tde>cuad'aud6ttangleu.Hlnh3.6chothiy Sv thayd6i cua nhi~tde>d'aud6t theothai gian theohai lo~ingQnlli'akh6ngkhi- acetyleneva N2O-acetylene.Hinh 3.7 la Svthayd6i cua de>hip thv Wongd6i theothaigiancuaph6hip thvAl.[49] t(phtit) 5 10 15 20 -+- ngqnlli'aair-acetylen -11--ngqnlli'aoxytnito-acetylenrich ngqnlli'aoxytnito-acetylenlean 25 30 IDnh 3.6:81.1thayd6i cuanhi~tdQd'aud6t theothO'igian si! giamkh6ngtuyenHnhcuade>hip thvtheonhi~tde>cuad'aud6tdu<;5cly giiiinhusan.H6n hcuad'aud6tva lamdffn nhit dQK 433 393 353 313 1 273 0 Chllo'ng3: Th1fcnghi~m Luq.nanTignsf Vq.tIi 68 nCid'aud6t.Do do,t6cdQcuakhi qualOphi (laminarly)xuyenquakhegiatangti l~voinhi~tdQ.Slf giat6ccuakhi n~pvaogaynenslfnoi rQngcuang<;mhl'a,bao g5mcavungnguyentii'hoa-mQtkhuvlfcquailtrQngquye'tdinhdQ ha'pthl,ld~t du'<Jc.Di~unay dfinde'ndQha'pthl,lgiamti l~voi slf giamnfmgdQnguyentii'do giatangth~tichnguyentii'hoavagiamthdigianhI'lltni (residencetime)trong du'ongquanghQc.CacphanlinghoahQcKayratrongquatrlnhb6choiclinglam thayd6idQd6ctrenhlnh3.7.MQthi~ulinggia taiti~nngQnlii'ati~m§n theomQt til~thu~ngiuadQha'pthl,lvanhi~tdQ.Ph'anhi~ulinggiatai nayco th~duQclo~i bCiid'aud6tduQclamnguQib~ngnuoc. Abs 110 tlidngdol1O0 90 80 70 60 50 0 5 10 15 20 25 t(phUt) 30 -+-SP 9 kh6ngHImnguQi -II- SP 190kh6nglamnguQi SP 190lamnguQiblingnude Hinh 3.7:811thayd6i cuadQhffpthQtlidngd6i cuaAl theothOigian RoussetdamatamQtd'aud6tduQclamnguQib~ngmtocsii'dl,lngkhang khf-acetylentrongphantichcacmfiusinhv~t.Vi~clamnguQid'aud6t6ndinh hoad~ng,hlnhthungQnlii'ava clfcti~uhoaslfnguyhi~mcuavi~cchaybell Itrong(flashback).NeybonvaCaqualisclingdatrangbi d'aud6tN2O-acetylen Qtvo ngoailamnguQi,nhungbdi VI hi~usua'tlamnguQitha'p nenkhangco cai ie'ndangk~trongphantich.Goguelsii'dl,lngd'aud6tco ranhdi~unhi~tdongian ChUdng3: Th{tcnghi?m Lu(inanTiin sfV(itly 69 vakhaosatslfthayd6icaed~etnI'ngtrongngQnlli'a.Widmerdaapdl)ngnude lamnguQieholo:;tid'aud6teuahangPye-Unieam.Caenhasanxua"tsailnayehe' t~od'aud6tco nhanhgiai nhi<$t.G'andayhangShimadzuda ehe't:;tod'aud6tvdi khe50mmb~ngtitanco h<$th6ngnudelamnguQi,t6edQdong0.4- 0.5 lit/phut, nhi~ttaira la 0.4J/phut,d:;tthi<$uqualamnguQi. Trongthlfete'nhaphantichco thSkh~ephl)edi~unay b~ngeachehaslf 6ndinhvacanb~ngnhi<$teuad'aud6t.Thai giane'anthie'tehoslfcanb~ngnayla khoang10phutd6i vdi ngQnlli'akhongkhi-aeetylenva 20phutd6i vdi ngQnlli'a NzO-aeetylen(hlnh3.6).Tuy nhienphai eha"pnh~nslf h:;tgiamkhoang70-80% dQha"pthl)t6iu'u(hlnh3.7). 3.2.3.sit dQngche'de')hi~uchinhdu'O'ngchu~n Che'dQhi<$uehinhduangehm'lnco trongph'anm~mHnhtoanke'tquaco m\lcdichkh~cphl)cslfkhong6n dinh,thuangla slfh:;tgiamcuadQha"pthl)theo thaigian.Sli'dl)ngtheoche'dQnayco thScoduQcke'tquaha"pthl)chinhxacb~ng eachnhanvdi mQth<$sO'hi<$uchuilntuye'nHnhdin CllvaodQha"pthl)doduQccua jungdich chuilnco n'ongdQcaonha"tvao thai diSmhi<$uchuiln[88].Vi<$cthlfc li~nhi<$uchuilnco thS lam ba"tCll luc nao,do v~yco thShi<$uchuilnnhi~ul'an rangca mQtthai gian dai do d:;tc.Hlnh 3.8 la trang hi<$uchuiln sensibility :orrectioncuamayAA 6501S. ChLtdng}~_I~zt~~ghifm Lu(inanTiin sfV(itly 70 Flame/Calibration Au SensitivityCorrection Sample No 2 3 4 5 6 >Sethighestconcentrationstandard,thenpress[ Measure(CaRR) ] Cancel Measure(CaRR) illnh 3.8:Tranghi~uchuftnsensibilitycorrection 3.2.4.Ke't lu~n. TrongphuongphapphantichYang,mQtrongnhungnguyennhangaysai l~chIOnnh1tla doslfphanb6khongd6ngnh1tcuav~mg,dc)cbit$tla truongh<;1p v~mgxamtanthotrongcacm§:uquc)ngth~chanh,sunphua,th~chanh-tuocmalin. Cach~tyangthothuongkhongth~nghi'endU<;1Cde'nco h~tphantich0.074mill. VoidQh~tkhongmill, slfb~tgc)phoc)ckhongb~tgc)p1h~tv~mgtrongIU<;1ngm§:u phiintichd§:nde'nnhungkhacbit$thob~ov'eke'tqua,themvaodo,gidi h~nphat hi~nclingkhongth~tin c~ydu<;1c.A.nhhuangcua dQh~tm§:utrongphepphan tichla r1t IOnth~hit$nquathlfcnghit$mtinhcacphuongsai 11ym§:uva phuong Conc Abs (ppm) 242.8nm 3.8082 0.3384 4.0684 0.3611 3.7533 0.3336 3.9400 0.3499 4.1235 0.3659 Chlio'ng3: Thlfc nghi?m LugnanTiin sfVgt1171 saidoquitrlnhtheochugnFisher.Do la mt)ttrongnhii'ngnguyennhangaymfft andinhcuake"tquaphantichvang.Vi<$ckh~cph\lcnhii'ngh(;lnche"neutrentilc h~giamdt)bfft6n co th~duQcthvchi<$nthongquaso d6phantichtrenray dudi rayvatinhtminhamluQngt6nghQpnhutren.Trongthvcte",phuongphapnaydff duQcapd\lngnhi~ud~ph\lcV\lchocacdonvi diachfftvacaccongtykhaithac yangtrongva ngoainudc.Ngoai fa, vdi Svsird\lngd'audo'tco di~unhi<$t,hao lackhih<$d(;ltduQccanb~ngnhi<$tva dungche"dt)hi<$uchugnduongchugnmt)t eachdungluc se lamcacke"tquachinhxacva 6ndinhbon. 3.3.MAD PHAN TICH - MauphantichduQcchQnla cacmallbauxitLamD6ngduQckyhi<$ut Bl de"nB10.Dayla lO(;limallbazanphongboa.Bauxitla tengQichungcholo(;li qu~ngchilacackhoangv~thydroxitnhom.Trongtv nhienco ba khoangv~t hydroxitnhom:gibsit,boehmitva diaspo[71].Cac nguyento'silic, sAt,titan thuongcotrongbauxitvdimt)thamluQngdangk~AhO335-55%,SiO20.1-15%, Fe20313-30%,TiO23.2-4.9%.Ngoairabauxitclingchilanhi~unguyento'nhu Mg,V, P, Co, Ni, Ph,Zn,Mn vdihamluQngnhoco 1.10-5-1.10-1%.Kha nang xua'thi<$ncackimlo(;liquitrongbauxitnhuvang,platinva cackim lo(;linhom platinIa rffthie"mvachuacotaili<$unaocongbo'chinhthilc.Tuynhien,vanco cacthongtinv~Svhi<$ndi<$ncuacacnguyento'nay.Svhi<$ndi<$ncuanguyento' NivdihamluQngkhaIOntrongmallbauxitcoth~la mt)tchithichoplatinvacac nguyento'trongnhomcuano.[55] - Lo(;limall thil hai duQcchQnla cac mall nhant(;lOduQctrt)nlam mall chuffn(etalon).Cacetalonaydungd~veduongcongchuffndungchophantich. N~nmallchuffncothanhph'antuongtvnhumallphantichvacacthanhph'anda luQngduQctrt)nb~ngcachoachffttinhkhie"tphantich,cacnguyento'phantich duQcchovaodudid(;lngdungdichcocachamluQngthichhQp.Mau nay dungd~ Chlidng3: Thl;tcnghi~m LugnanTiin sfVgtly 72 d1,1'ngdu'dngchwlnthvcnghil$mchorheintichva co th~dungd~rheintichnhu' mallthu'dngd~ki~mtra de)chinhxac cuaphu'ongpharoCac m~unay du'<;1Cky hi~utu CB l-CB 5 va CG l-CG5. - Lo;;tim~uthuba la m~uchuffntv nhienquO'cte'co ham1u'<;1ngAu, Pt, Pd du'<;jephe chuffndungd~ki~mtraphu'ongpharoM~uchuffnSU-la cua Canada voicac ham 1u'<;1ngdu'<;1Cphe chuffn:Ni 1.233%,Cu 0.967%,Co 0.041%, Ag 4.3ppm,Pt 0.41ppm,Pd 0.37ppm.M~unaydu'<;1cky hil$uSU-la. Ngoai ra conco caem~uchuffndia cha'tVil$tNam do Be)Congnghil$pphe chuffnmangky hil$u MC 1,MC 2, MCS 1,MCS 2, MCS3. Toanbe)cacm~uchuffnnay co ham1u'<;1ng v~mgcao,dodo trQng1u'<;1ngrheintichbandftusedu'<;1cgiamme)tcach'thichh<;1p. - Lo;;tim~uthu tu'Ia m~udia cha'tcuaphu'ongan Tra My Tc1cPo thue)c Liendo~mBandBDia cha'tMiSnNam.Deiyla 5 m~uconhiSuNi conhiSuhy vQngchuaPt.M~udu'<;1ckyhil$uTMTP1,TMTP2.TMTP3,TMTP4,TMTP5. - Lo;;ttm~utrongme)tdSanvangcuaxi nghil$p156Lien doanDia cha't10 cocaeke'tqua rheintichki~mtra (j cacdon vi rheintichkhactheocacphu'ong pMptruySnthO'ng.M~udu'<;1Cky hil$uKtngl-KtnglO - Lo;;ttm~ucua dS an Le)cNinh thue)cLien doanBan dB Dia cha'tMiSn Namcocacquarheintichki~mtra(j nhungthdidi~mkhacnhaucua2 donvi rheintichkhacnhaukerncacnguyento'kimlo;;tikhacAg, Cu,Ph,Zn.M~udu'<;1c kyhil$uLN 1de'nLN 5. 3.4.CHE Ti).O ETALON Etalon cho cacham1u'<;1ngvi 1u'<;1ngdu'<;1cdiSu che'theohai bu'oc:sa d\mg hoacha't inhkhie'td~t;;tonSnva saudochodungdichtieu chuffnVaGm~ub~ng nhung 1u'<;1ngthich h<;1p. 3.4.1.Sil'dqnghoacha'ttinh khie'td~t~on'enetalon EtalonphaiconSntu'ongtvnhu'm~udangkhaosat. Chl1dng3: ThTfcnghi~m Lwl.nanTitn sf V(itly 73 Trongdi~uki~nbauxitVi~tnam[31],n~nm~udU<;1CtrQnnhusail : AhO3==56% ,SiOz==14%, FeZO3==27%, TiOz ==3% va dayla n~ncuacacm~uCB1-CB50. Caem~udaqu~ngkhacthuongra'tg'anvoi granitco thanhph'ann~nnhusail: AhO3==30%, SiOz==59%, FeZO3==5% , TiOz ==2%, MgO ==1%, NazO ==3%, KzO==1%, day la n~ncua cac m~uCG 1-CG50. Ta'tca dU<;1cnghi~ntrong c6i su de'ndQd'ongnha't. 3.4.2.SitdQ-ngdung<ijehehuftnehtiacaenguyento'philotiehvaom§un'en Dungpipetdehutnhungthetichnha'td!nhcuadungd!chchu§:ng6cAu, Pt,1000ppmdet~odungd!chchua10ppmcacnguyento'Au, Pt Tli dungd!ch nay,tacothet~ocacetaIontuyy chom6itruongh<;1pphantichsaochokhoang hamIU<;1ngcuaetalonbaatrumkhoanghamlu<;1ngcothecocuacacnguyento'co trongm~u[17].Trongtruongh<;1pC1;lthenay,co thet~ocacm~uchu§:nphantich chotrongbang3.11nhusau: Stt 1 2 3 4 5 6 7 8 9 10 Bang3.11:Caem§uehuftndtiQ'ehe't~o Tenm~uITrQng IU<;1ng~n(g) Dungd!ch0.1ppm(ml) Ham IU<;1ng(ppt) 10CB 1 CB 2 50 50 0.005 0.025 50 100CB 3 CB4 50 50 500 1000 0.05 0.25 CB 5 CG 1 50 50 0.5 0.005 10 50CG2 CG3 50 50 100 500 0.025 0.05 CG4 CG5 50 50 0.25 0.5 1000 Chlldng3:r~1fcnghifm Lu(inanTiln sfV(itIf 74 ,.! ~~? ,.!- 3.5.DOT MAD DE LO~I CHAT HUD CO Cac m~uc6 nhi~ucha"thfi'ucd c'anphai duQcd6t truocd~lo(;li[2].Ngoai facaclo(;lim~uthuongc6mallxamvang,xamd~mden(chuanhi~uchancopyrit, asenopyrit...) ra"tkh6 chaydii da:chothemdinhs~thay tangcha"toxyh6a.Di~u nayd~nde'nhi~ntuQngma"tvangnha"tla d nhunghamluQngnhc>.Tai li~u cling chirac'anphaithV'chi~ncongdo(;lnd6ttruoccaclo(;lim~unay.KhaosatthV'c nghi~mnhi~tdQd6tchoke'tquatrongbang3.12vad6thi3.9. Bang3.12:Quanh~giiiaham1u'Q'ngvangthudu'Q'cvanhi~tdQd6t Ke'tquaduQCly giai,Au bi As gill trongcachQpcha"tsulphuakhi nhi~tdQ d6ttha"p[27]va khongtanhe'tdu'Qctrongcdnmuabl,lichI.Khi tangnhi~tdQd6t AuduQcgiaiph6ngdoca"utrucasenopyritbi phavo,As bayhdi,khananggill Augiam.Tuynhiencangtangcaonhi~tdQvangclingbi ma"tdohi~ntuQngbay hditV'nhien.Di~unaykhongxayra trong10filingchaym~udoAu luc d6bi mua blJichicu6ntheoxu6ngdaychen. Theokhaosatnay,nhi~tdQd6tm~utruocduQcchQnla 600°C, nhi~tdQ duQcnanglentutu vaduytritrong2giG. Nhit dQ10(oC) 500 550 600 650 700 750 HamluQngAu (ppm)M1 1.14 2.12 2.54 2.50 1.82 1.68 HamluQngAu (ppm)M2 0.08 0.15 0.31 0.32 0.28 0.16 HamluQngAu (ppm)M3 0.98 1.05 1.23 1.20 1.10 0.90 ChlltJngLTi!l£C_!lghi?m Lu~nanTiln sfV~tly 75 ppm 3 2.5 2 dQC 1.5 1 0.5 0 400 600500 700 800-hamhlQngco2.5ppm -fI- hamhlQngcoO.3ppm hamhlQngco 1.2ppm ? Hinh3.9:Anhhddngcuanhi~td()d6tvaohamIdQ'ngAu thudu'Q'c 3.6.NUNGCHAYMAU Tuy thuQcvaod~cdi~mImmingv~teuam~umaco congthucph6"ili~u khacnhau.Cancuvaod~cdi~mcuatunglOpqu~ngvakinhnghi~mthtfcte', ngu'oitada:t6ngke'tnhi~utai li~uthanhmQtbangt6ngh<;1pthanhph6"ili~udung trongquatrlnhfilingehay.D6"ivoi m~uth1;tchanhva silicat,sa dl,mgcongthuc ph6ili~unhu'sail:50gm~uqu~ngda:du'<;1Cnghi~nde'ncoh1;tt0.074mm,50goxyt chi,2,5g tinhbQt,70gsoda, 15gborac.D6"ivoi m~uBI-BIO va SU-la, sadl,mg ph6ili~usail:50gm~uqu~ngda:du'<;1enghi~nde'ncoh1;tt0.074mm,40goxytchi, 4gtinhbQt,70gsoda,20ghorae,5gSiO2.Ph6"ili~uva m~udu'<;1CtrQnd~uvacho vimchenfilingchay.Thtfchi~neongdo1;tnfilingehaythu'ongkhoang45,50phut. Tachph'anxi ra khoinl;!chi.Thu'ongkh6"i1u'<;1ngcuanl;!chi trongkhoang28- 32g thivi~cDongchay d1;ttyell c'au.Cac congthucph6"ili~uthu'ongdungcho cac d~ngkhoangv~tda:du'<;1cnhi~utac gia khacnghiencUuva du'<;1Ct6ngh<;1pnhu' Chl1c1ng3: ThT!cnghi?m Lu(inanTiin sfV(itly 76 bang3.13.Hlnh 3.10la giai do~nth1!chi<$nxongcongdo~nfilingchayrn~u,rn~u dangdu'c;1cchovaochens~t. Bang3.13:Pholli~uvOitunglo~im~u[32] Up Lqrinilu Klii 4bg (g) q$1g IT mlU RD tinhW Na£D3 txric Si(h dinh 1 Thch anh va da silicat 50 50 2.5 70 15 - - 2 Set 50 60 3 70 30 10 - I 3 Vav6ichill chanh 50 60 2 60 20 3 - 4 Va carbonat 50 50 3 60 40 30 - 5 Piritngheo&. thch anh 50 50 2 100 25 5 2-3 6 Piritlo trungblnh 50 50 - 80 15 5 2-3 II 7 Piritgiau 50 45 - 130 40 - 2-3 8 Vagrafitlk pirit 50 50 2.5 80 20 10 2-3 9 Va micagrafit 50 50 3 70 15 5 2-3 10 Quan.gsilt 50 60 4 80 20 10 11 Lirnonit-thchanh 50 40 3 70 20 5 2-3 III 12 Granat-Piroxen- 50 40 4 60 27 25 2-3 rnagnesit 13 Antirnonit 25 70 - 80 25 - - 14 Antirnonit&. thchanh 25 80 - 80 20 - - N 15 Asenopirit 50 50 4 70 15 5 - 16 Casiterit 50 50 15 75 20 - 2-3 17 Khancopirit 50 50 2 70 20 5 - Chl1dng3..ThT!cnghi?m Luq.nanTitnsfVq.tli 77 ffinh3.10:Congdo~nchomdudfinungchayvitochensdt 3.7.CUPEN HOA NT)CHI 3.7.1.Chen capen Capen1a10(;lichenday,co16nhodungd~tachAu, Ag va cackim 10(;liqui fakhoiPh. No co khananghtp tht,lttt caoxytkim 10(;li.Cac kim 10(;liqui kh6ng bioxythoa nenkh6ngbi hutvao capen.CapendU<;1Csa dt,lngco thanhph'anIa h6nh<;1pmagnesit,xi mangva nuoctheoti 1<$73:15:12.Ttt cab<)tmagnesitvaxi mangdu<;1ctr<)nd'eu,choquadiy 1mm. Kich thuoccuacapen:caD25mm,duong kinh35mm,sau7-8mm.TrQng1U<;1ngcapenco60g.Thuongcapenco th~htp tht,l 1U<;1ngchi b~ngtrQng1U<;1ngcuano.Cac t(;lpchtt trongcapend'euphai du<;1cki~m ITatrong10(;ltche't(;lo.T(;lpchtt cuacapentrong10(;ltthinghi<$mnay:Al 0.05%,Si 0.1%,Ca 0.1%, Fe 3%,V 0.01%, Mn 0.05%,Ti 0.003%,Co 0.003%,Ni 0.01%, Cr3%,Sn 0.0003%,Cu,0.001%,Na 0.1% 1ad(;ltyetidiu chophantich. Cupenboatrong10filingd nhi<$td<)850°C .Bi~mke'tthucquatrinhcupen coth~nh~nbie'tdu<;1ckhi h<;lth<;1pkim tVnhien10esangva trd l(;limatih6ng[2]. H<;ltkim co d(;lnghinhc'auva co matisangr5 r<$t.B'em~tdt,lchayvangchungto nhi<$td<)cupenquathtp.Khi 1u<;1ngvangchie'mtren50%thih(;ltkim phaicomati ~mg.B'em~tphiaduoicuah(;ltkim c'anphaibttngph~ng.Ne'uco cacnguyento' gallcanthi d(;lngcuah(;ltkim sethayd6i.Te vaPt lamchoh(;ltkim co matidt,lc. ChUdng_3:Thljcnghi?m Lu(inanTi€n sf V(itly 78 Hamhi<;1ngPt tu0,1% se lamh(;ltkim khongsang.Khi Pt Ion hdn 1% thl h(;ltnay cod~.tngtinh th~. Sadl,mgh(;ltkim nayd~phantichvang,platintnlc tiSptren10graphittheoky thu~tha'pthlJnguyentaho~cphantichnhanhb~ngquangph6phatX(;lnguyentit 3.7.2.TrQng1u'Q'ngcuachencapentru'ocva sankhi cupenhoa Bang3.14chomQts6thongs6v~trQnglU<;1ngcuachencapentruocvasau cupen,trQnglU<;1nglJ chI d~tha'ytac dlJng cua chen capen. Bang3.14:MQts6thongs6v'etrQng1u'Q'ngcuachencapen Voi cacs61i~utren,tacoth~kStlu~n:Trangquatrlnhcupen,chIvacac kimlo(;likhongquiho~ccosucdingb~m~tnhod~ubi hutvaochencapenduoi tacdQngcuahlc maod~n[67].Ph'anma'tmatdobayhdi la khongdangk~. 3.7.3.Caenguyent6 kim lo~itrong nl}chi va trong h~tkim Phantichquangph6:chencapentruockhi cupen(1), nlJ chI (2), h(;ltkim thudu<;1csaucupen(3).m~ucaolin(4). Dungm~u1ftcaolinvoi hamluQngcackim lo(;li1ftra'ttha'pph'anxi nhi~u d~ki~mtra ca quatrlnhfilingchay.KSt quaphantichquangph6 cac m~unay chotrangbang3.15. S6 TrQngluQng TrQngluQng TrQngluQng TrQngluQng TrQngluQng hiu chenchua chensaukhi nlJchI(g) chensau h(;ltkim chen sa'y(g) sa'y(g) cupen(g) (mg) 1 65.4 64.3 28.6 92.8 18-20 2 59.6 58.2 32.6 91.8 18-20 3 63.7 61.0 33.5 96.7 18-20 4 69.9 67.8 18.2 87.7 18-20 5 64.5 61.6 34.0 96.5 18-20 Chl1o'ng3: ThlfC nghi?m Lu(inanTi€n sfV(itif 79 Bang3.15:Ke'tquaphantlchquangph6caemfiu1,2,3,4 2 Al 0.05 0.03 OJXB >10 Cd Si 0.1 0.05 0.005 >10 Ga 0.002 Mg >3 0.02 0.5 OJ Ge - Ca 0.1 0.05 - 0.05 Be Ba - - - - In Fe 3 0.2 0.02 0.5 Tli - I 0.0005 V 0.01 0.0005 - 0.01 Ta Mn 0.05 0.002 0.001 0.005 Nb Ti 0.003 0.01 0.002 0.5 Zr I - I - I - I 0.02 Co 0.003 - - - Hf Ni 0.01 0.005 O.0002 0.0003 U Cr >3 0.001 0.02 0.005 Th Mo - - - - p W - - - - Na I 0.1 I 0.15 I - I 0.1 Sn 0.0003 - 0.00030.0003 Li Sb - - - - Ce As - - - - La Bi - 0.05 0.2 - Y Cu 0.001 0.03 0.001 0.002 Yb Au - - - - Gd Ag - 0.1 >1 - Sc I - I - I - I 0.0005 - - I >10 I 0.05 I 0.005 I Pt I - I - I 0.00031 0.001 Zn ChU(jf1g3: Thl!c nghi?m Luq.nanTiin sf Vq.tif 80 S61i<$utrenchotake't1u~n: - Roa cha'tdung lam chen capenhO[lllto[lll khong chua cac nguyent6 yangvakim lo~inhomp1atin -N\l chIcochuata'tcacackim lo~itrongm~u(Fe, Mn, Cu, Zn...),ph'anxi (Si,Ca,Mg...)da:bi lo~ifa.£)i~unaychungtocongdo~nfilingchaym~u1at6t. - Cac kim lo~ikhongqui ho~cco sucding m~tngoainhobi huthoantoan yaOchencapen. - R~tkimchi conchuadahI'<;fngb~cva cackimlo~iquinhu'Au, nhom platinvaBi (cackimlo~icotytrQngcaovasucdingm~tngoaiIOn).£)i~unay chUngtdquatrlnhcupenhoad~tyell c'au. ? , "'- 3.8.KHAO SAT CHUaNG TRINH NHIET H~tkim du'<;fCcho vao qI'c thanva phantich theoche'dQ10voi chu'dng trlnh10du'<;fcthie'tke'quacaekhaosatt6i u'uboa.Toan bQcackhao satnaybaa g6m:khaosatcacthongs6cuact!cthanvacacnguyent6t~pcha'tcotrongct!c :handSch~cch~ndingkhongcost!nhi~mnhi~ugayrabdi cacnguyent6nay dliphantich;khaosatph6cuanguyent6n~nva khanangtrungl~pvoi v~ch )h6phantich;khaosatthaigianvanhi<$tdQlamkho;thaigianvanhi<$tdQtro loa;thaigianvanhi<$tdQnguyentti'boa. 1.8.1.Khao satcQ'cthan M~unitmtrong10la dn lien co thSsti'dl,mgct!cthankhongphupyro1itic. vIQtvaithongs6cuact!cthannhu'sau:[97] -£)i<$ntrd : 8,5ohmmm2m-l - £)Qd~nnhi<$t: 0,35ca1cm-lsec-l°C1 - Kh6i 1u'<;fngrieng : 1,75gcm-3 - £)Qh~tt6i da :75J.1m ChUdng3: ThT!cnghi~m - HI$s6gianndtuye'ntinh:4.10-6°C1 - Di~mn6ngehay: 3500°C Lu(manTifnsfV(itly 81 - Caenguyent6 t<;lPeha't: ( f.lgg-l) B 0,01;Ca 0,20;Cu 0,10;Fe 0,20;Mg 0,05;Si 0,20;V 0,01;Ash 2,0. C6 th~sadl;lngdil$nevethaneuahangsanxua'tho~egiaeongtu thanh thantinhkhie'tquangph6.L6 thonghoi giuaduQeeaitie'nsaoehorQngbon du'ongkinh euah<;ltkim d~e6th~ehoh<;ltkim di qua.H<;ltkim duQelam hoi dyp bAngeachd~pbuad~tranhbi Ian tronglong dil$neve.Long dil$nevebi h<;ltkim cheffiQtph'ananhsang,saugiai do<;lntro h6a99%h<;ltkim la nguyent6 Ag bi b6choi,nhuv~yd gia do<;lnguyenta h6ad~do Au va saud6 la Pt, luQnganh sangtudeneatodxemnhukhongbi can.Nhuv~ye'anphaid~tehe'dQautozero chothie'tbi dotruoekhi ehoh<;ltkimvaodil$nevethan.Hinh3.11la caed<;lng di~nevethaneuahangsanxua'tduQesadl;lng,vavi tri euah<;ltkim.[101] 0 ~ t:J0 Hinh3.11:D~;mghinhhQCcuadi~ncQcthanvacQcthandagiacong ChztO'ng3: ThT!cnghi?m Lu(inan Ti€n sf V(itly 82 3.8.2.Khao sat sf/.trung l~pv~chph6 H~tkimdemphantichbaag6mb~c,v~mgvacacnguyento' hQplatinnhu Pt,Pd, Os, Re, Rh, Bi ne'uco. Toan bQcaenguyento'nay khongco caev~eh trungIi[Lpvoi v~chyang242.8nm. (Khe mayha'pthv nguyenta du<jcsa dvng trangtruongh<jpnayIa 0.5nm,nencaev~chtrongkhoang242.8:t0.3nmd'eu duQcxemIatIlingIi[Lp.Covaiv~chPttrongkhoangnay,nhungdochiIav~ch ye'ukhongnh~y,honmladoAu Ia mQtquatrlnhbO'choi phando~n,nhi~tdQhie d6khongdud~Pt gayanhhuang).Mi[Ltkhaeph6cuanguyento'b~edongvai tro lan~nt~ora mQtphonglien Wcch6ngIen v~ehph6phan tich,vi the'co th~Io~i tnl'anh huang nay b[ing cach sa dvng che'dQ hi~u ehinh n'en (background correction)[87].Bang3.16ehov~chphantichcuaAu vaPt va caev~chIanc~n. Bang3.16:Cacv~chIanci;lncuaAu vaPt vacu'ongdi)cuachung[62] Cac nguyento'Fe va Mn co th~gaynhiSmnhiSuehophepdo bdi 2 19uyento'nayIaph6bie'ntrongm~uqui[LngvaIuonIat~pcha'trongqI'cthanva V(;lchphantich(A°) V ehIancn (A°)vacuongdQ( ) vacuongdQ() Fe 2428.20(9),Ag 2428.196(1),Mo 2428.18(15), V(;lchAu 2427.95 W 2428.173(5),Sr 2428.095(10),Pt 2428.035(10) (400) Th 2427.99(3),Mn 2427.978(SO),Ir 2427.963(5), Os 2927.900(8),W 2427.813(7),Mn 2427.753(50) W 2659.697(12),Hf 2659.69(3), Ta 2659.655(15), V(;lchPt 2659.45 Ru 2659.615(80),V 2659.606(9),Rh 2659.472(3) (2000) Au 2659.43(5),Eu 2659.42(4),Ta 2659.41(20), Cd 2659.29(5), Yb 2659.28(2),Fe 2659.24(8) ChllO'ng3.. Th1fc nghi?m Lug.nanTiensf Vg.tIi 83 tren guyenHk cov~chph6tIlingl~p.Khaosatcacnhi~mnhi~unaydu'Qcth\!,c hi~ntrongph'ansail 3.8.3.Khao satgiai do~nlam kho Trongtru'anghQpphantichtr\!,ctie'p,mfiuv~tla ra:nDenthaigianva nhi<$t dQHimkho khongc'anphai khaosat.Tuy nhienne'usii'dl;lngphu'ongphapphan nchthemtrongdoc'anphaithemIu'QngchuftnVaGdi<$nc\!'cthandu'oid~ngdung djchthicoth~chQnthaigiansa'ykhola 1,5- 2 schom6i~ldungdich[83],baa damtranhhi<$ntu'QngsuibQtho~cbiba:nvang.Nhi<$tdQlamkh6du'Qcd~tdtris6 thOngthu'ang120°Cvoi thaigian 10s, sii'dl;lngche'dQgia nhi<$tramp (nhi<$tdQ tangd~u). 3.8.4.Khaosatgiaido~ntro hoa Nhi<$mVl;lcuagiaido~ntrohoathu'angla:phanbuymu6icuanguyent6 phantich,du6icacanioncuahQpcha'tkhac,phabuycachQpcha'tvocovahUu cd,tachnguyent6phantichra khoi mangmongra:nbarnd day,ti~nxii'ly mfiu r~n.Sailgiaido~n aylacachQpcha'tb~nvungcuanguyent6phantich.Co th~ xemdayla giaido~ntieuphangiatai [85,86].H~tkimd d~ngkimlo~iDenco chSchila chuy~ntitra:nsanglongvasaildola tr~ngthaihoi.Bay la giado~n b6choiphando~nb~ngcachchoAgb6choitru'ocmavfingill l~idu'QcAu vaPt. MQt khao satth\!,cnghi<$mc'anth\!,chi<$nky t~ibu'ocnay vi Ie d~co th~ Io~is\!'hi<$ndi<$ncuab~c,takhongth~du'anhi<$tdQtrohoa leDquacao.Bi~m n6ngchaycuab~c962°Cvacuavang1064oCduxanhau,DendaylamQthu~n I~ichoquatrinhtroboa. 3.8.4.1.Khaosatnhi~tdQtrohoa Khaosatnhi<$tdQtrohoad~dambaakhongma'tAu va Pt tronggiaido~n flyb~ngcachdodQha'pthl;lcuavangva Pt.Ke'tquachod bang3.17vahinh .12.dnhi<$tdQ950°CAbs ba:td'augiam,chQnnhi<$tdQtrohoadkhoangnay. ChU(Jflg3: J'h,!c nghi?m Luq.nanTiln sf Vq.t11 84 Bang3.17:Khaosatnhi~tdQtro hoa Nhit%tdQnguyentahoa1700oCchoAu,2500oCchoPt Thaigiannguyentahoa3s Thaigiantrohoa90s Che'dQhit%uchinhnt3nBGC-D2 DungdichAu n6ngdQO.lng/J.ll,lu'<Jngdungdichsadt,mg10J.lltu'dngdu'dngIng DungdichPt n6ngdQIng/J.ll,lu'<Jngdungdichsadl;!ng10J.lltu'dngdu'dnglOng Abs 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 600 dQC 700 900 1000 1100 1200 1300800 ~ dOhffpth1,lcua Au--dOhffpth1,lcuaPt Hlnh 3.12:1fothjv'esf!thayd6icuadQha'pthQAu, Pt theonhi~tdQtro hoa Nhit dQtrohoa 1700 1800 1900 1950 11000 11100 11200 DQha'pthl;!Au 10.180 10.192 10.184 10.186 10.172 10.140 10.042 DQha'pthl;!Pt 10.245 10.267 10.258 10.258 10.269 10.248 10.250 I1dng3: Th1!cnghi?m Lui)nanTitnsi Vi)tIi 85 3.8.4.2.KhaosatthOigiantro hoa Saudokhaosatxungquanhnhi~tdQtrohoaduQcch<;m965°Cvoicacthai giantrohoakhacnhau b~ngcachdo dQha'pthl)n~ntronggiai do~nnguyentit h6achocaAu vaPt. Ke'tquatht!cnghi~mchotrongbang3.18va d6thi 3.13. Bang3.18:KhaosatthOigiantro hoa Nhi~tdQtroboa965°C Nhi~tdQnguyentii'hoa2500oC,A=266.0nm(buocsongcuaPt) Thaigiannguyentii'hoa3s Che'dQhi~uchinhn~nBGC-Dz Thaigiantrohoa(s) DQhffpthl)n~n 30 0.250 40 0.221 50 0.188 60 0.164 70 0.185 80 0.160 90 0.162 Ke'tlu~n:Nhi~tdQtrohoaduQcchQnla 965°Cva thaigiantfOhoala 90s. Khongth~giamdQha'pthl)cuan~nhdnduQcnii'adil cokeo dai thaigiantrohoa Iduhdn90s.Bi~unaycoth~ly giaibditrong6nggfaphitv~ncomQtm~tdQhdi khongthoatfaduQc. Nhit dQtroboa965°C Nhit dQnguyentii'hoa 1700oC,A=242.8nm(buocsongcuaAu) Thai giannguyentii'hoa3s Che'dQhiu chinhnn BGC-Dz Thaigiantrohoa(s) 30 40 50 60 70 80 90 DQha'pthl)nn 0.342 0.301 0.256 0.224 0.157 0.124 0.120 ChllC1ng3: ThT!cnghi?m Lu(inanTi€n sf V(itly 86 Abs 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 20 30 60 100 t(s)40 50 70 80 90 -+- dQhffpthl;1n~nd bu'ocsongcuaAu --- dQhffpthl;1n~ndbu'ocsongcuaPt IDnh3.13:Ha'ptht}n'enct}'ctiiu sauthaigian80-90s 3.8.5.Khaosatgiaido~nnguyentit'hoa Bay Ia giaido(,l.nt(,l.Ora nguyentii'ha'pthl,l.Sturgeonva Chakrabati[92] tomt~tquatrlnht(,l.Oranguyentii'ha'pthl,lnhu'sau: MO (R)+C (R) M(R) 7 M(R) + CO M(K)7 C'ankhao satnhi~tdQnguyentii'h6a,d(,l.ngmlii ha'pthl,l,phu'ongphapdo (dochi~ucao cua dinhha'pthl,lhay di~ntichph6ha'pthl,l),thai gian nguyentii' oa. D(,I.ngph6ha'pthl,lthu'angIa d(,l.ngGauss,thai gian tu'ongling vdi dQban vathaigiankhue'chtanv~ fQngIa 0.6s(trongd6 thaigiand(,l.tdinh Ia '(1=0.2s ~ongIa '(2=O.4s) I ChUdng-3:_IhT!cnghi?m Lu(inanTiln sfV(itif 87 Sa dl,mgphuongphaptichphandi~ntichph6hffpthl,1thichh<;1phontrong tntangh<;1pnaydochuangtrlnhnhi~tkeodai,anhhudngcuagiatai la khongnho vahamlU<;1nguyento'phantichcokhoangrQng. Thai giannguyentahoadU<;1Ckhaosatxungquanh3s.Theo 19thuye'tchi c'anmQtthaigiangffpdoi thaigiantuongling voi dQbanrQngla duoThl!cte'phu heJpvoi 19thuye't,dQhffpthl,1khongtangdu co d~tthai giannguyenta hoa dai hon3s. Ke'th<;1pcacdi~uki~ntrenkhaosatdQhffpthucuaAu theonhi~tdQ nguyentahoad cacthaigiantrohoakhacnhau.Ke'tquachotrenbang3.19va dbthichotrenhlnh3.14. Bang 3.19:Khao satdQhffpthQcuaAu theonhi~tdQnguyentii'hoa Nhi~tdQlamkho 105°C,Thai gian5s Nhi~tdQtroboa965°C,Thai gian90s Thai giannguyentahoa3s. Do di~ntich,Che'dQhi~uchinhn~nBGC-Dz A=242.8nm(buocsongcuaAu) hi~tdQnguyentahoa(oC) bscua Au d t trohoa90s 1100 1200 1400 1600 1700 1800 1900 0,1960.10510,12610,17210,19010,19610,201 bscua Au d t trohoa20s 0.06510.07210.12010.14510.15610.16010.168 0.09510.10010.13210.15810.16410.17010.174~bscua Au d t trohoa40s Abscua Au d t trohoa80s 0.10010.12010.16410.17610.18410.18810.190 Chuclng3: Th1!cnghi?m Lu(inanTiin sfV(itly 88 0.1 dQC 0.25 Abs 0.2 0.15 0.05 0 100 -+- dQha'jJth\lcuaAu a t troh6a90s-- dQhajJth\lcuaAuat troh6a20s dQhajJth\lcuaAua ttroh6a40s ~ dQhapth\lcuaAuat tmh6a80s 2000 Hinh 3.14:811thayd6i de.ha'pth1;lcuaAu theonhi~tde.nguyentii'hoa TudngtV,ke'thQpcacdi~ukit$ntrenkhaosatde)ha'pthucuaPt theonhit$t dQnguyenttl'hoad thaigiantrohoaduQcchQnt6i u'u90s.Ke'tquachotrenbang 3.20vadBthichotrenhlnh3.15. Bang3.20:Khaosatde.ha'pth1;lcuaPt theonhi~tde.nguyentii'hoa Nhit$tde)lamkh6 105°C,Thai gian5s Nhit$tde)troboa965°C,Thai gian90s Thai giannguyenttl'hoa3s. Do dit$ntich,Che'de)hit$uchinhnn BGC-D2 A=266.0nm(bu(k songcuaPt) Nhit$tde)nguyenttl'hoa(oC) 1500 1700 2000 2200 2500 2700 DQha'pth\lcuaPt 0,012 0,021 0,080 0,162 0,267 0,265 Chl1ong3: Th1!cnghi?m Lu(inanTiin sfV(itly 89 Abs 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 ' 1100 1300 1500 1700 1900 2100 2300 I dQ hllp th~ cU. Pt J Hlnh 3.15:Sq thayd6i d(>hffpth1.1cuaPt theonhi~td(>nguyentii'hoa Ke'tlu?n:Nhi~tdQnguyentii'h6aduQcchQnla 1700oC-1800oCchoAu va 2500oCchoPt trongtruanghQpphiintfchdQcI?p 2 nguyento"nay tren2 h~tkim riengIe. C'anphai chuydi~unay,bdi Ie mQtph'anm\lc tieu cuad~tai conphai d~tduQcla phiintichcaAu vaPt trenclingmQth~tkim.Cackhaosatlienquail de'nhi~tdQnguyentii'h6aseduQctie'pwc trongph'ankhaosatnhi~tdQbO"chai phiindo~ndSphiintfchPt. Chuangtrlnh10tuangling cho2 nguyento"nay [103]duQcchotrenbang 3.21va 3.22. Bang3.21:Chu'dngtrinh10graphitchophantichAu Giai T dQ(°c) Thai Khi Lu'uluQng Heat Do Khdi don glan khi (lIp) ph6ng I 120 5 #1 1,0 RAMP 2 800 10 #1 1,0 RAMP 3 970 90 #1 O.OH STEP .............................................. 4 1700 3 #1 O.OH STEP Do 2 5 1900 2 #1 O.OH STEP Phztdng3: Th1!cnghi?m LuiJn anTitn sf ViJt Ii 90 Bang3.22:Chudngtrinh10graphitchophantichPt T dQ(DC)I Thai I Khi I Lu'ulu'Qng; Heat! Do ! Giai do';ln I glan 5 10 #1 [" "" I #1 5 khi(lIp) 1,0 1,0 O.OH O.OH O.OH Khdi phong RAMP I<AMP STEP ~.~~.~"..i,,~-~ STEP 2 j.8.6.Khaosatcaeye'uto'gaynhi~mnhi~u CacySuto'gaynhi~mnhi~ubaag5mmatrixAg, cact~pcha'tcotrongqtc hallsadt,mg,cact~pcha'tcotronghoacha'tsadt,mgtrongcongdo~nfilingchay wacaccacnguyento'kimlo~iquicotrongh~tkim. - B~cIa thanhph'andalu'Qngcuah~tkim.V~chtrungl~p quangph6Ag 2428.196ADcocu'angdQra'tySunenkhongcokhananggaynhi~mnhi~u.N~n 'doAgt~onenl~ilakhongdangkebdiIe Ag la nguyento'ngheov~ch,cacv~ch ffi';lnhvanh~ynha'tachbi~th~ncacv~chha'pth1,lcuaAu vaPt.Phonglient1,lC t';lOra d cacvi triv~chha'pth1,lAu 2427.95ADva Pt 2659.45la ra'tySucothe nMnbiStquaph6phatx~nguyenta.Nhi~mnhi~udophongnayt~ora d~dang bilo~itrukhi sa d1,lngchSde>chinhn~nb~ngdendeuterium(BG-D2).Caev~ch nh';lynha'tcuaAg vacu'angdQphongndiv~chha'pth1,lAu, Pt cholIen bang3.23. Bang3.23:CuOngd(}ra'tm~nhcuacaev~chAgvacUOngd(}khongdangki cuan'enAg t~icaev~chphantichAu, Pt V';lch 5465.48 5209.06 3382.89 Cu'dngde>11000 11500 11000 Cu'dngdQcuaphongd v~chAu 2427.95AD Cu'dngdQcuaphongd v~chPt 2659.45 3280.68 2000 2437.79 60 2246.41 25 5 4 Chuang3:Th1!cnghi?m Lu(inanTiin sfV(itly 91 - Caenguyento'cokhananggaynhi~mnhi~utrongquatrlnhdoAu chico th~Hi Fe va Mn VI co v~chtIling I~p. Cae nguyento'co kha nanggay nhi~m nhi~utrongquatrlnhdoPtchicoth~laFe.Caev~chtIlingI~pcuacaenguyento' khacnhu Mo, W, Sf, Th, Ir, Os. Hf, Ta, Ru, V, Eu, Cd, Yb kh6nganhhuangdo bdicuongdQcaev~chnayquabevacaenguyento'naykh6nghi<$ndi<$ntrong h~tkimsauquatrlnhnungchayvacupenboa. - SvanhhuangcuaFe tenphepdoAu vaPtdUQ~khaosattheoeachsau: chu§:nbi tungdungdichdocothanhph'an 'enphilhQpkh6ngchuaAu vaPt,chi chuanguyento'canFe voin'ongdQtangd'an.Do dQha'pthva ngaybuocsong cuaAu var'oidodQha'pthva ngaybuocsongcuaPt.Saudochu§:nbi I~idung dichtudngtv nhungco chuaAu vaPt, thvchi<$nI~ivi<$cdodQha'pthvcuaAu va Pt[75].Ke'tquachotrenbang3.24hlnh3.16vabang3.25hlnh3.17. Bang 3.24:D()ha'ptht;ldoFe t~ora t~iv~chAu va Pt Dotheochudngtrlnhnhi<$t3.18choAu Dotheochudngtrlnhnhi<$t3.19choPt HamluQngFe (%) 0.00 0.01 0.1 I 2 5 Absti vch Au 0.002 -0.005 -0.010 0.008 0.002 -0.012 Hlpthvn'en 0.054 0.045 0.031 0.018 0.026 0.056 Absti vch Pt -0.014 0.008 0.005 0.007 -0.001 -0.010 Hlpthvn'en 0.078 0.120 0.068 0.096 0.087 0.110 Noise :to.10 :to.10 :to.10 :to.10 :to.10 :to.10 'hl1(Jngl:Ih1!c nghi?m Abs 0.120 0.100 0.080 0.060 0.040 0.020 0.000 -0.020 -0.040 0.01 Lu(inanTitn sf V(it11 92 0.10 1.00 -+- Abs tai vachAu - AbstaivachPt Abs ntsntai vachAu -)E- Abs ni:ntaivachPt ~ du'dngnoised'u'ong ~ du'dngnoiseam 10.00 %Fe mnh3.16:Df)hffpth1}.doFe t~orakhongdangki Bang3.25:811thayd6idf)hffpth1}.cuaAu vaPt theohamhi<!ngFe mnh 3.17:811thayd6idf)hffpth1}.cuaAu vaPt theohamlti<!ngFe Abs 0.400 0.350 0.300 0.250 0.200 0.150 0.100 0.050 0.000 0.01 %Fe 0.10 1.00 10.00 -+- dQha'pthl!cuaAu - dQha'pthl!cuaPt 80 theochu'dngtrlnhnhit 3.18choAu 80 theochu'dngtrlnhnhit 3.19choPt Hamlu'<JngFe(%) 0.00 0.01 0.1 0.2 0.5 1 15 Absti vch Au 0.168 0.175 0.172 0.169 0.174 0.16510.154 Absti vch Pt 0.265I0.284I0.275I0.282I0.271I0.265I0.253 ChUdng3: ThT!cnghifm Lu(inanTiensfV(itly 93 K€t lu~nv~anhhuangcuaFe: Fe lamh~giamh~pthvd~clac cuaAu va Pt,anhhuangh~giamchi dangk6khi hamIU<;5ngFe co 1% trdlen.H~pthvdo Fet~ora d v~chphantichdu<;5cch€dQ trll n~nBGC-D210~ih~n. - SlJ'anhhuangcuaMn lenphepdoAu du<;5CkhaosattheocachtuangtV' Ke'tquacholIen bang3.26,bang3.27vahinh3.18. Bang 3.26:DQha'pthQ.doMn t~ora t~iv~chAu Bang 3.27:S1fthayd6idQha'pthQ.cuaAu theohamlu'gngMn K€t lu~nv~anhhuangcuaMn: Mn lamh~giamh~pthvd~claccuaAu, anhhuangh~giamchidangk6khihamIU<;5ngMn co5%trdlen.H~pthvdoMn t~ora d v~chphan tich du<;5cch€dQ trll n~nBGC-D210~i h~n. Do theochuangtrinhnhit$t3.18choAu Do theochuangtrinhnhit$t3.19choPt Hamlu<;5ngMn(%) 0.00 0.1 0.5 1 2 5 Absti vch Au -0.010 -0.002 -0.008 0.005 0.002 -0.008 Ha'pthvnn 0.035 0.038 0.041 0.044 0.048 0.046 Do theochuangtrinhnhit$t3.18choAu Do theochuangtrinhnhit$t3.19choPt Hamlu<;5ngMn(%) 0.00 0.1 0.5 1 2 5 Absti vch Au 0.186 0.179 0.198 0.186 0.190 0.175 . ChuC!!!g3: Th1!cnghi?m Lul)nanTi€n sf VI)tly 94 %Mn 10.00 -+- AbstaivachAu -- Absn~niaivachAu AbscuaAu . ~ duongnoisedudng --- duongnoiseam -"--- IDnh3.18:DQha'pth.,.doMn t~ora khongdangk~ - Caet~peha'trongqte thansll'dt;mgduQephantichb~ngquangph6phat x~cohamluQngnhusail:Al 0.01%, Si 0.02%,Ca 0.01%, Mg 0.005%,Fe 0.02%, B 0.01%, Mn 0.005%,Ti 0.001%, Cu 0.001%. Cae t~peha'trongh~tkim duQe phantichb~ngquangph6phatx~co hamluQngnhusail:Al 0.003%,Si 0.005%, Mg 0.5%,Fe 0.02%,Mn 0.001%, Ti 0.002%,Ni 0.0002%,Cr 0.02%,Sn 0.0003%,Bi 0.2%,Cu 0.001%, Pb 0.05%.So sanhgia tri hamluQngeuacae nguyento't~peha'tcotrongh~tkimvaevethansll'dt,mgvahamluQngt6ithiSu dtidSgaynhi~ucothSke'tlu~n:Caenhi~mnhi~utrongphepdotIeD10graphite Ii kh6ngdangkS.QuatrlnhfilingehayvacureDhoavilacotaedt,mglamgiau VITacotaedt,mgh~nehe'caenhi~mnhi~uquangph6,v~tly, hoahQemabinh thuongra'tkho lo~itrongphuongphapha'pthl,lnguyentll'. 0.300 Abs 0.250 0.200 0.150 0.100 0.050 0.000 -0.050 0.10 'huang3: II1.J(Cnghi~m Lu(inanTiin sfV(itIi 95 .9.KHAOSATNHltT DOBOCHOIPHANDO~NDE PHANTicH Pt Nhi~tnongchaycuaAu la 1063DCvacuaPt la 1796DCduxanhaud~co th~thvchi~nb6chaiphando1;ln.Tuynhienkhi vangnongchaychuy~nthanh longf5i hai d~nguyentii'boa,vftnco hi~ntU<;1ngkeDtheohayba:nvangcae nguyentii'Pt vacaekimlo1;likhaccotronglongevethan.Sl;l'ma'tcaenguyentii' Pttronggiai do1;lnguyentii'hoavangcangtang khi nhi~tde>tang.Do v~y,c'an phiHkhaosatde>ha'pth\lcuaP~theoeachthucxemgiai dO,;lllnguyentii'hoavang 1ftgiaido1;lntrohoatrongphepxacdinhPt. TheokStquacuaph'ankhaosattren, tacoth~gill nhi~tde>nguyentii'hoacuaPt la 2500DC,themgiai do1;lntrohoathu haitrongchuangtrlnhnhi~tvathayd6inhi~tde>trohoanay.KSt quakhaosat cholIenbang3.28,void'6thi3.19 Bang3.28:DQha'pth.,cuaPt khi thayd6inhi~tdQtro hoafan2 Nhit de>troboa965Dc.Thai gian90s Thai giantrohoal'an2 la 3s Nhit de>nguyentii'hoa2500Dc Thai giannguyentii'hoa3s ChSde>hiu chinhnn BGC-D2 Nhit de>trohoa 1200 1400 1600 1700 1800 1900 2000 l'an2 (DC) De>ha'pth\lPt 0.255 0.250 0.250 0.258 0.244 0.210 0.185 % ma'tmat 0 0 0 0 5 18 30 Chl1rJng3: Th1!cnghi?m Lu(manTiensfVgtif 96 Abs 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 1100 1300 2100dQC1500 1700 1900 --- Sl!ma'tPt theonhi~tdQtrohoafan2 mnh3.19:DuOngcongthi hi~nsf/.miltmatPt theonhi~tdf)tro hoafan2 Du'ongcongthehi~ns1;l'mc1tmatPt do hi~ntu'<;5ngkeo theokhi thayd6i nhi~tdQnguyentl'ihoaAu du'<;5cthehi~ntronghlnh3.19cho tadi d€n k€t lu~n: SekhongHi va'nd'ekhi phantichtungyell c'auriengbi~ttrenhai h<:Ltkim rieng bi~t.Tuy nhien l<;5idl;!ngcongdo<:Lnlam gi~lUm~uquagiai do<:LnDungchayva cupenkhaphuct<:LPva t6nkern,ngu'oitav~nco thephantichdu'<;5C2 quikim tren clingmQth<:Ltkim. Bai toanchQnnhi~tdQnguyentU'hoathichh<;5pla mc1uch6t cuavc1nd'e.Nhi~tdQnguyentU'hoaAu dli caodekichthichcaenguyentU'Au ha'pthl;!,nhu'ngclingphaidlitha'pdekhongKayrahi~ntu'<;5ngmc1tPtho~cs1;l'mc1t matla khongdangke d giai do<:Lnsautilegiai do<:LnnguyentU'hoaPt. Nhu'v~y,chu'angtrlnhnhi~tt6iu'uxacdinhAu vaPt trenclingh<:Ltkim cho trenbang3.29. Ih/Jdng3: Ih1f~ n.ghi?m Lu(inanTiin sf V(it11 97 Bang3.29:Chlidngtrinhnhi~txac(ijnhAu vaPt lal I T di)(oc)i Thoi Khi I Lu'uluQng Heat Do Khdi ! i o~nI ; glan I khi(lIp) phong I 1 ! 120 5! #1 1,0 2 ! 800 1"-10---; 1,0 3 970 O.OH ~""-j~,,OO 3 #1 O.OH I STEP Do 5 1 2500 3 #1 I O.OH I STEP Do, 2 6"""127'00""'! 2 #1 ! 0.0H ? ,.!',? , 3.10.KHOANG TUYEN TINH CUA PHEP DO Duongehuffntuye'ntinhcod~;mgA =aC +b Trongdocaeh~s6a vab duQetinhb~ngphuongphapblnhphuongqie ti€u theoeongthue: n"C.A.-"C" A..LJ I I .LJ I .LJ I a = j j j nI Cj2 -(I CJ2 j LAj-aLCj b = j j n Caee~ps6tinhtoanAj,Cj la di)ha'pthl,lvahamluQngeuanguyent6co trongmftuehuffnthui. Caemayha'pthl,lnguyentli'ngaynayd~ucoph'anm~m tinhtoanva xli'ly ke'tquii. Caes6li~udoehuffnduQetrlnhbaytrongbang3.30.Chti Y hamluQng du<;1edo la hamluQngtuy~td6ico trongh~tkim. Chl1dng3: ThT!cnghi?m Lwl.nanTitn sf Vt;ltIf 98 Bang3.30:Di)ha'pth\lcuaAu vaPt lJ caehamlu'Q'ngchudnkhacnhau Hamlu'<Jngtuy~tdO'i(ng) 0.1 0.2 0.5 1 2 5 10 20 50 100 ~sAu ~ 0.060 0.080 0.110 0.154 0.220 0.400 0.462 0.528 0.61410.657 0.025 0.030 0.034 0.038 0.087 0.181 0.260 0.385 0.69811.001 Khmlngtuye'ntlnhcuaphepdoAu la:0.1-5.0ng Khmlngtuye'ntinhcuaphepdoPtla:5-50ng TITdo co thgtinhdu'<Jckhmlngham1u'<Jngthichh<Jpchophu'ongphapphan tichnay.BO'ivoi caeham1u'<Jngvu'<Jtra ngoaikhoangnay,co th~xU'ly theomQt trongba each:ho~cghlm trQng1u'<Jngcan phan tich ban d'au,ho~csU'd\lng chuangtrlnhdu'ongcongb~c2 trongph'anm~mcuamayha'pth\lnguyentU',ho~c hoatanh~tkim va doha'pth\lnguyentU'theophu'ongphapngQnIU'atruy~nthO'ng [49,51,66].Hlnh 3.20 va 3.21 la du'ongchuffnb~c 1 va b~c2 cua Au. Hlnh 3.22va 3.23la du'ongchuffnb~c1vab~c2 cuaPt. Caedu'ongchuffntuye'ntlnhdu'<Jctinhcaeh~sO'a va b, dQl~chchuffndu' Sresidue(standardederrorof theestimate),dQl~chchuffncuacaeh~sO'h5iqui sea),s(b),vah~sO'tu'ongquantuye'ntinhR. [19] ChUdng3: Th1!cnghi?m Abs 0.5 0.4 Lu~nanTiln SlV~tly 99 0.3 0.2 0.1 0 (ng) 0 2 4 6 -+- duongchugntuye'ntinhAu Y=0.0672x+0.0721 - duongchugnxffpxi R2=0.9891 Hlnh3.20:DuOngchu'nb~c1vaduOngxa'pXlcuaAu Cae thong s6 : Sresidue=0.015 a=0.067 sea)=0.004 s(b)=0.008b=0.072 20 60 (ng) 80 100 120 2 y=-3E-05x +0.0057x+0.4158 R2=0.991 40 -+- du'ongchu~nb~c2Au- du'ongchu~nxa'pxi b~c2Au Hlnh 3.21:DuOngchu'n b~c2 va dUOngxa'pXl cuaAu Abs 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0 Chl1(Jng~: Th1jcnghi?m Luq.nanTitn sf Vq.tiy100 Abs 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 ng 0 20 40 60 Y =0.0113x + 0.1412 R2=0.9953 -+- du'ongchugntuye'nHnhPt - du'ongchugnxapxi Hinh 3.22:DuO'ngchu§n b~c1va duO'ngxffpXl cua Pt Cae thongs6 : Sresidue=0.017 a=0.0113 b=0.141 sea)=0.0005 s(b)=0.013 0.8 ng 1.2 Abs 0.6 0.4 0.2 0 0 50 100 -+- duongchu~nb~c2cuaPt I y=-5E-05x2+0.0142x+0.123- duongchu~nxfipxi b~c2 cuaPt R2=1 Hinh 3.23:DuO'ngchu§n b~c2 va dUO'ngxffpXl cuaPt hl1O'ng3: ThTfc:~ghi?m Lu(manTitn sf V(ltIf 101 A' ~ A? , .11.PHAN TICH Au vaPt BANG QUANG PHO PHAT X~ .11.1.Di~ncrf.cthan Bi~n qte thandungtrongphantichphai ki~mtra d~baa damkh6ngeo Icaet~peha'teuanguyento'phantich.Bi~neveeod~ngnhusau: - Buongkinh16di~neve:3,5mm -B9sau16di~neve:4,Omm - B9 daythanhdi~neve:O,7mm Bi~nevetrengotnhQnthanhhlnhnonel;1t.Caedi~neveduoiduQekhoan b~ngmayti~nevethanva eaedaDphayehuyendung.D~ngdi~nevethaneho trenhlnh3.24. 6mm 'l Bi~nevetren 4.5mm ~ - Buongkinh16khoan:2-3mm - Chi~usau16khoan:4mm Bi~neveduoi mnh 3.24:D~ngdi~ncrf.cthandtiQ'cgiacongchophilotich caenguyento'nhornPt. 3.11.2.Ghi phSphatx~ M~uduQenh6iVaG16khoandi~nevevasa'ykh6saukhidungdungdieh nhom~u.Trenkinhanhquangph6eo13xI8,dungmayDFC-8eaehtii'ea'p1d~ Chli{jflg3: ThT!cnghi~m Lu(inanTitn sf V(itIi 102 ghiph6em!m~uphantichvaetalon.Thuph6CJ vungbuoesongtir2500A°de'n 3500A°.Vi tri d~tthangbuoesong335nm.Di~uki~nghiph6trenmaynhusau: - H~ehie'usang3 tha'ukinh - CudngdQdongh5quang15A -Khemay15~m -Ch~nsangtrunggian2mm -Thdigianghiph63,5phut/ m~u -Hi~nvahamanhtheodi~uki~nthongthudngeuaphongthinghi~m 3.11.3.Philo tich ph6 - Sa dt;mgvi tr~equangke'MD-l 00d~dodQdeneuacaev~ehsau: - Do caethongso': - DQdenem!v~ehphantich(Spt) - DQdeneuaphongbell e~nh(St) Tinh caethongso'sau: - Spt - Sf=F - TirF suyraD - (Spt -D) D laso'hi~uehinhtrongpheptrirphongnhusau: log Ipt=log(IpcIf) - D ( Ipf +If J ( Ipf +If J D =log - log - 1 If If Nguyento' Au Au Pt A(A°)phantich 2675.95 2924.79 2659.45 phong trai trai prun ChUdng3: ThT!cnghi~m Lw?nanTiensf V(ltly103 Trongdo : Ipt:eu'ongdQv~ehphantich If: eu'ongdQphong Th1;lenghi~mtachi dodu'<;1et6ng(Ipt+If ) va It-.trongkhi e'and~ilu'<;1ngIpt. Ddu'<;1etinhtheoeongthuetrenva caenhasanxua"tvi trclequangkt dii tinhs~n Dsuyra tud~ilu'<;1ngF d~eungea"pehokhaehhang[12] 3.11.4.Tinh tOllnke'tqua - Phu'dngphapdBthj:Ve dBthj trengia"ylogaritvdi hoanhdQla ham lU<;1ngC emlcaeetalonvatungdQla (Spt-D) Dl,l'avaodu'ongthiingnay suyra ham1u'<;1ngemlnguyento'trongm~usaukhi dii dovatinhdu'<;1etrj (Spt- D) tu'dngung - Phu'dngphap blnh phu'dnge1;leti~u:L~p ehu'dngtrinh tinh loan theo phu'dngphapbinhphu'dnge1;leti~utrenmaytinhvdi 3 etaIon .Th1;lehi~ntinhloan hamIu'Qngeuanguyento'trongm~usaukhi n~ptrj Spt,Sf tu'dngung. - CaedBthj trongphu'dngphap3m~uehuffnehotrongph1;ll1;le4. -Ngo~isuyke'tqua:Tru'ongh<;1ptrj sO'Sptvu'<;1tfa ngoaiph~mvi eua3 m~u chuffn,eoth~ngo~isuydu'ongthiingkhongquamQtb~eham1u'<;1ng. Chu(Jng3: Th¥c_nghi?m Lu~nanTi€n sf V~tly104 3.12.TOM TAT QUI TRINH PHAN TicH Au VOl DO PHAT HltN CO PPT QuitrlnhphantichAu voi dQphathi<%ncopptdu'<;JctomHitnhu'sau: a. Can50gm~uqu~ngda:du'<;Jcnghiende"ncoh~t0.074mmtrencanky thu~tco dQchinhxacO.Olgvaobatsa:trangmenho~cc6cnhvacodungtich300m!. Ne"um§:uchliach:1thUllcdthlc'anphaid6ttntocdnhi<%tdQ600°Ctrong2giG. b. Tie"nhanhph6i li<%um~udin cli theothanhph'ankhoangv~tcua m§:u.Can rhO, tinhbQt,trQndell r6i cantie"pcarbonatnatri,bodc, bQtSiO2.TrQndell t:1tca ph6i li<%uva cho vao to gi:1ygoi m~uco kich thu'oc18x24cmda:du'<;Jc cuQnsoa:nloaken.Can 15gh6nh<;Jpnatricarbonatvabora:crheati 1<%2:1phu 1entrencungcuagoim~u.L:1ydl1athuytinhchQc116phiatrenbaagoiva cho5m1nitratb~cvaotuburette. c. D~tchennghi<%mrheathli tv qui dinhvao 10filing1uy<%n.Cling c:1pnhi<%tdQ cho 10.Khi nhi<%tdQtangd'ande"n600°C,t~mnga:t10,bo cac goi m§:uvao dungchennghi<%mtheodungthli tv quidinh.Cho 10tie"pWcho~tdQng.Quan sathi<%ntu'<;Jngfilingchayquaci'tas6 10.Khi roanbQm~uda:chaylong d6ng nh:1t(thu'ongsau45-50phut),ta:t10vakhoacacvanl~i. d. Dungkypga:pl:1ychenra va nhanhchongrot roanbQkh6i chayvaochensa:t. DSnguQi,gotachph'anxi rakhoin1;lchI.Dungdevabuad~pgochocacn1;l chIcod~nghinhhQpdyt,Cankh6i1u'<;Jngn1;lchI,ne"ukh6i1u'<;Jngtrongkhoang 28-32g 1avi<%cfiling chay d~tyell c'au. e. D~tchencapenvao10cupen.Nangd'annhi<%tdQ1en750°Ckhi th:1yt:1tca capennongdomallh6ng(thu'ongkho?mgsau1giG),dungkyp chon1;lchI vao capen.Dong ci'ta10,de"nnhi<%tdQ850°Cphaihe mdci'ta10chokh6ngkhi 1Qt vela.DiSm ke"thucco thSnh~nbie"tdu'<;Jckhi h~tkim loe sangva trd l~imall h6ng.Dungkyp ga:pcapenra ngoai.dS nguQiva datmongh~tkim tru'ockhi chovaocvcthan10graphit Chl1(Jngl:Ihlfc nghi?m Lu~nan Titn sf V~tIi 105 f. f)~tcacthongs6maydffduQckhaosatt6i u'uchomaynguyenta ha'pthl;l nguyentaco10graphit:dencatod,cuongdOden,khe,chi~ucao10graphit, bu'ocsongphfintich, cho h<%th6ngkhi Ar va h<%th6ngnuoc lam nguOiho~t dOng. g. sadl;lngche'dOBGC-Dz, che'dOdodi<%ntichha'pthl;l h. f)~tchudngtrinh10theobang i. Autozerotoanh<% j. rho m~uh~tkim khongqu~ngvaoql'cthandffgiacongb~ngcachdungkyp. sa dl;lngche'dOdoBLANK d~th\fchi<%nchudngtrinh10 k. L'anluQtchom~uh~tkim chuffnvaoCU9than.Sa dl;lngche'dOMEASURE. d~ th\fchi<%nchudngtrinh10. 1. sa dl;lngche'dOCURVE d~d\fngduongcongchuffnb~c1ho~cb~c2 ffi.Sadl;lngche'dOSAMPLE d~docach~tkim phfintich. ,..' ? ,.. , 3.13.KET QUA PHAN TICH 3.13.1.Cae ke'tquaphandehsdbQ Cac ke'tquaphfintichsdbOtr\fctie'pb~ngquangph6phatx~cach~tkim, nl;}chi,hoacha't,cha'tli<%uchencapen,m~un~ndunglam cd sa d~khaosatcac nhi~mnhi~uduQcchotrongphl;lll;lc2. 3.13.2.Caeke'tquaphandehbiingha'pthQnguyentit'truy'enth6ng Cacke'tquaphfintichb~ngphudngphapha'pthl;lnguyentatruy~nth6ng cacm~udunglamcdsad~d6ichie'uki~mtraduQcchotrongphl;lIl;lC3. 3.13.3.Cae ke'tquaphandeh mauehudn Cac ke'tquaphfintichm~uchuffnva cacetalonduQcchotrongbang3.31. Chlidng3: Tht!cnghim LUlJnanTiln sf Vi;ltly106 Bang3.31:Ke'tquaphilotiehhamluqngAu vaPt euamauehuaova etaloo satha HamluQng(ppt) Tenmiiu Au Pt tv Phantich Chugn Phantich Chugn 1 CB 1 10 10 20 10 2 CB2 60 50 50 50 3 CB 3 90 100 80 100 4 CB4 450 500 600 500 5 CB5 960 1000 950 1000 6 CG 1 10 10 15 10 7 CG2 60 50 60 50 8 CG3 80 100 90 100 9 CG4 450 500 620 500 10 CG5 1100 1000 1200 1000 11 MCS3 700 770 11 SU-1a 370 410 3.13.4.Caeke'tquaphilodehAu vaPt caemau(liaeha't Cacmiiudiacha'tduQcneuCJph'an3.2duQcphantich ke'tquachotrong bang3.32. Chuang3:Th1!cnghi?m LuQnanTiln si VQtly107 Bang3.32:Ktt quaphilntichhamhiqngAu vaPt cuamaudiacha't S6thiltt;1' Tenmftu Hamltt<;1ng(ppt) Au Pt 1 B1 5 <100 2 B2 5 <100 3 B3 5 <100 4 B4 <5 <100 5 B5 <5 <100 6 B6 <5 <100 7 B7 5 <100 8 B8 <5 <100 9 B9 10 <100 10 B10 10 <100 11 Ktng1 680 <100 12 Ktng2 100 <100 13 Ktng3 720 <100 14 Ktng4 210 <100 15 Ktng5 540 <100 16 Ktng6 980 <100 17 Ktng7 770 <100 18 Ktng8 220 <100 19 Ktng9 60 <100 20 Ktng10 440 <100 21 TMTP1 (213/1) <5 45000 22 TMTP2 (1269) 20 8600 hl1l1ng3: Th1!cnghi?m Luq.nan Tin sf Vq.tly108 23 TMTP3(2104) 30 38000 24 TMTP4 (8025/3) 10 27000 25 TMTP5 (8076/3) 10 52000 26 LN 1(12503/1) 1200 100 27 LN2 (12503/3) 1800 200 28 LN3 (12531/2) 850 <100 29 LN4 (12533/1) 1000 <100 30 LN5 (12536/1) 620 <100 3.13.5.Caeke'tquatinhd()khongdambao Caeke'tquatinhdQkhongdambaaehotrongphl;lll;le11 3.13.6.Cae ke'tquaphilo tieh figureDto'Au, Pt biingquangphS phat x figureDtli' Di'euehe'lot etalonehu§:ntheobang3.33.Ke'tquaphantichdbang3.34. Bang3.33:Lot etalondu'(jehe'to Ten Tn;mgluqng Dungdieh Hamluqng Hamluqng Stt A nn (g) 100ppm(ml) Au (ppb) Pt (ppb)mau 1 C 10 50 0.005 10 10 2 C20 50 0.01 20 20 3 C40 50 0.02 40 40 4 C80 50 0.04 80 80 5 C200 50 0.1 200 200 6 C400 50 0.2 400 400 7 C 1000 50 0.5 1000 1000 8 C 2000 50 1.0 2000 2000 Ghichu:* BLANK: m§:ukhongqu~ng * - :khongphathil$ndu'cjc Chl1O11g3: Thljc nghim Luq.nanTitnsfvq.tIf 109 Bang3.34:Ke't quaphantlch caeAu, Pt bng quangph6phat x s6 Hamhtcjngphantich(ppb) Hamlu'cjngchu§:n(ppb) Tenm§:u (hii'tv Pt Pd Au Pt Pd Au 1 B1 - - - 2 B2 - - - 3 B3 - - - 4 B4 - - - 5 B5 - - - 6 B6 - - - 7 B7 - - - 8 B8 - - - 9 B9 - - - 10 B10 - - - !11 TMTP1 50 70 - 12 TMTP2 10 - - 13 BLANK - - - 14 C10 15 10 10 10 10 10 15 C20 30 20 30 20 20 20 16 C40 30 50 50 40 40 40 17 C80 100 100 100 80 80 80 18 C200 180 200 150 200 200 200 19 C400 350 350 300 400 400 400 20 SU-1a 350 400 1000 410 370