微波消解-电感耦合等离子体质谱法同时测定废水中20种元素

采用微波消解-电感耦合等离子体质谱法,同时测定了废水中Be、V、Cr、Mn、Co、Ni、Cu、Zn、As、Se、Mo、Ag、Cd、Sb、Ba、Hg、Tl、Pb、Th、U等20种元素,比较了5种不同消解体系对废水样品的加标回收结果,确定采用硝酸+过氧化氢消解体系。Hg在0.050μg/L～2.00μg/L、其他元素在5.00μg/L～500μg/L范围内线性良好,检出限为0.01μg/L～0.2μg/L,国家有证标准物质的测定结果符合要求,废水样品平行测定的RSD为2.6%～6.5%,加标回收率为84%～110%。

Simultaneous Determination of Twenty Elements in Wastewater by ICP-MS with Microwave Digestion

Twenty kinds of elements such as Be, V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, Hg, T1, Pb, Th and U in wastewater were simultaneously determined by inductively coupled plasma mass spectrometry with microwave digestion. After test results comparison of 5 digestion systems for the wastewater, HNO3 ＋ H2O2 system was finally taken for the determination. The calibration curves showed a good linearity from 5.00 μg/L to 500μg/L for Be, V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Mo, Ag, Cd, Sb, Ba, T1, Pb, Th and U, and from 0. 050 μg/L to 2.00 μg/L for Hg. Detection limits ranged from 0.01μg/L to 0.2μg/L. Test results of national standard material meet the requirements. RSD of duplicated wastewater samples test ranged from 2.6% to 6.5%. Spiked recoveries ranged from 84% to 110%.