在线冷阱捕集氢化物法流液测定海水中砷和锑
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摘要: 本文提出了一自动流液系统,在线液氮冷阱捕集氢化物、无焰原子吸收法测定海水中无机砷和锑对反应酸度、硼氢化钠用量、载气(高纯氮)流量等进行条件实验和最佳化选择,该法的检出限砷为0.15μg/l,锑为0.24μg/l在测定微克/升级海水样品时,砷和锑的变异系数分别为±4%和±10%一次测定消耗样品量分别为:砷9ml,锑12ml测定频率分别为:砷20个/小时,锑15个/小时.
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Andreae.M.0.,The determination of the cheemical species of some of the "Hydride Elements"(Arsenic,Antimony.Tin and Germanium)in sea water:Methodology and Results,in Trace Metals in Sea Water(ed.by Wong)C.S.et al.Plenum Press,New York and London,1983,1-20. Braman,R.S.,et al.,Direct volatilizition-spectral emission type detection system for nanogram amounts of arsenic and antimony,Anal.Chem.,44(1972),2195-2199. Andreae.M.O.elal.,Determinationofantimony(III),Antimony(V),and Methylantimony species in naural watwrs by atomic absorption spertrometry with hydride generation Anal.Chem.,53(1981),1766-1771. Andreae,M.O.et al.,Methods of seawater analysis(ed.by Grasshoff,K.,et al.),Verlag Chemie Gmbh.1983,218-230. Ruzicka,J.and E.H.Hansen,Flow lnjection Analysis,John Wiley&Sons,1981. -
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