硫脲介质2火焰原子吸收光谱法测定矿石中银

,2008,28(7):59261MetallurgicalAnalysis,2008,28(7):59261:1000-7571(2008)07-0059-032(,350008):,,,++4,10g/L,610g/mL,A=010045+010068,r=019996,0101mg/L,110%316%,96%103%,,:;;;:O657131:A:2007-12-17:(1964),,,,Tel:[phone],E2mail:swklnm@1631com,110-5%,,(Ag2S),,,,:[1][1][1-6][7],,,,,,,,,1111GGX2600();();Transferpette(,10100L,1001000L):32811nm,410mA,012nm,407V,10mm,3s,610L/min,110L/min:1mg/mL,011575g(),015110mL,100mL,,;:100g/L,,112015110g150mL,20mLHCl,,20min,5mLHNO3,,,,5mL,,,50mL,,,,95©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(7):592612211GBW072593,,215,510,1010mL,Fe3+,,,5mL212(L/min):0175,110,1125,1152mg/L,110L/min,,110L/min213450mL100g,10mL5mL715mL(1mL+1g+011g),,,(mg/L):01039,01036,01039,01038,10g/L,2mg/L,1mol/L(mg/L):Fe3+,Al3+(500);K+,Na+,Mg2+,Ca2+,Mn2+,Zn2+,Cu2+,Pb2+(200)2140,50,100,150,300,500g50mL,510mL,,0610g/mL,A=010045+010068,r=019996;20,3/k0101mg/L2156,110%316%,,11Table1Accuracyandprecisionn=6,g/gSampleNo1FoundAverageCertified(%)RSDGBW07163216,223,229,208,219,21121822010316GBW072554615,4713,4811,4715,4617,451647104619111119GBW07259564,570,560,561,558,573564559151102163,,96%103%,22Table2Recoverytestsn=3SampleNo1(g/g)Found(g)Added(g)Recovered(%)Recovery1#1035048962#5650511023#2810098984#6110097975#351001031033(log1=714,log2=1311),;,(),,,06©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(7):59261:[1]1()[M].:,19911[2],1-[J]1(GoldScienceandTechnology),2005,13(4):412441[3],,,1-[J]1(ChemicalWorld),2005,46(3):15121541[4],1++[J]1(RockandMineralAnalysis),2000,19(4):30123031[5],,1[J]1(SpectroscopyandSpectralAnalysis),1996,16(3):9921041[6]1[J]1:(PhysicalTestingandChemicalAnalysis:PartBChemicalAnalysis),1993,29(6):3681[7],,1-[J]1(ChineseJournalofAnalysisLabora2tory),2006,25(7):10521081DeterminationofsilverinorebyflameatomicabsorptionspectrometryinthioureamediumHUANGRen2zhong(FujianHuanminMiningIndustryCo.Ltd.,Fuzhou350008,China)Abstract:Thedeterminationofsilverinorebyflameatomicabsorptionspectrometrywasperformedafterthesamplewasdecomposedbyaquaregiaandextractedbythiourea.Thedosageofthioureawasascertainedthroughexperiments.Thecharacteristicconcentrationofsilverinfourdifferentmediumsincludingaquaregia,ammonia,thioureaandperchloricacid-tartaricacid-thioureawasinvestigated.Theresultsshowedthatinthethioureamediumat10g/L,thelinearitywasgoodinsilvermasscon2centrationupto6.0g/mL.TheequationoflinearregressionwasA=0.0045+0.0068withcorre2lationcoefficientof0.9996.Thedetectionlimitofthismethodis0.01mg/L,RSDis1.0%-3.6%andtherecoveryofstandardadditionis96%-103%.Thismethodwasappliedtothedeterminationofnationalprimarystandardmaterials,andtheresultswereingoodagreementwiththecertifiedvalues.Keywords:thiourea;flameatomicabsorptionspectrometry;ore;silver16©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.