摘要
针对易挥发元素Hg提出了大试管和红外加热的多孔控温消解炉的简单装置消解植物样品的大管回流法。该方法结合ICP-MS测定Hg,指出在0.18%L-半胱氨酸加入内标做清洗液消除汞的记忆效应,校准曲线有一个更好的相关系数r=0.9993,Hg的测定限可达0.012μg/g(10σ,DF=100);并比较了原子荧光测定Hg的测定限0.0013μg/g(10σ,DF=100)和测定结果。该方法经标准物质GSV-3、GSV-4、GSB-1、GSB-6、GSB-10和GSB-4验证,测定值与标准值基本吻合。实验结果表明,该消解方法中Hg基本没有损失,而且ICP-MS的测定Hg的同时可以测定Li、B、Cr、Mn、Co、Ni、Cu、Zn、As、Sr、Mo、Cd、Ba和Pb等痕量元素。
In order to determination of volatilizable element Hg in plant samples, the method that plant samples were digested with the simple setting-furnace digestion and big cuvettes and determined by ICP-MS was brought forward in this paper. The instrument conditions were optimized. L-cysteine was preferred as the most suitable washing reagent and was added into the inner standard solution. A better linear calibration curve was obtained with the correlation coefficient of 0. 9993, and which the detection limit for Hg was 0. 012 μg/g（10σ,DF= 100）by ICP-MS. while the detection limit for Hg was 0. 0013μg/g （10σ,DF= 100）by AFS. The standard substances GSV-3 ,GSV-4,GSB -1 ,GSB-6 ,GSB-10, and GSB-4 was digested with this method and determined by ICP-MS , which certified volatilizable element Hg wasn＇t of loss with the digestion method. As the same as determination of Li, B,Cr, Mn,Co, Ni, Cu, Zn, As, Sr, Mo, Cd, Ba and Pb could also get good results. The results were in good agreement with the certified values.
出处
《矿物岩石地球化学通报》
CAS
CSCD
2007年第2期136-140,共5页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国土资源地质大调查项目(1212010660902)
关键词
大试管回流
电感耦合等离子体质谱ICP-MS
植物样品
汞
dispelling furnace digestion
inductively coupled plasma atomic mass spectrometry
plant samples
mercury
