国标GB575085双硫腙分光光度法测定镉对水样预处理方法的探讨

:1006-446X(2001)04-0068-03GB5750-85王晓关淑霞申华(广东省南海市南海发展股份有限公司,广东南海528200):Cd,,,-,Na3PO4,600,:,;;:O65732:A!∀(GB5750-85),,,,,,,,,,,,-,Na3PO4,Na3PO4,,600,,,,111;GB5750~851230%;100mg/L;3+97;GB5750~8513131,300mL100mL,5mL,,200mL100mg/L,,6001h,5mL3+97,,20mL,,,,132GB5750-85221,1:2001-02-18#68#2001GUANGDONGWEILIANGYUANSUKEXUE841Cd/mg#L112345678∃00170019001800160017001600150018%00320036003500330035003100340033,∃0017mg/L,00013,765%,%0034mg/L,0017,500%22221,Cd,,22123456/mg#L1/mg#L1(n)/mg#L1/%00170018300361056001700183003494400170038300549740017003830053947001700553007096400170055300731018222,,33/mg#L1(n)/mg#L1/%123002500500075333002400510073-400+200-26723,:150g/LFe47g/LMn,28g/LPb,37g/LCu,30g/LZn,44g/LHgCd3,,,:[1]GB5750-85.[S].[2]TompsettSL.Analyst(London),1956,81:330.[3][M].#69#2001GUANGDONGWEILIANGYUANSUKEXUE84StudyonDigestiveMethodofWaterSampleforDeterminationofCdbyDithizoneSpectrophotometry(GB5750-85)WANGXiao,GUANShu-xia,SHENHua(NanhaiDevelopmentStockLimitedCompany,Guangdong,Nanhai528200)Abstract:ThedigestivemethodofwaterhasbeenstudiedfordeterminationofCdbydithizonespectrophotometry.ThesamplesweretreatedbytheHNO3-H2O2andashedby600hightemperatureinthepresenceofNa3PO4.Theresultsaresatisfactory.Keywords:digestivemethod;Cd,dithizone;spectrophotometry!∀[2001]48,&∋,160,,10,20,18,,!,,,,,,&∋,#70#2001GUANGDONGWEILIANGYUANSUKEXUE84