微波消解-石墨炉原子吸收光谱法测定川牛膝中铅和镉  

Determination of Pb and Cd in Cyathula officinalis Kuan Based on Microwave Digestion-Graphite Furnace Atomic Absorption Spectrometry

作　　者：马金华[1] 

机构地区：[1]西昌学院,四川西昌615022

出　　处：《安徽农业科学》2011年第24期14618-14619,共2页Journal of Anhui Agricultural Sciences

基　　金：四川省教育厅科研基金项目(08zc015)

摘　　要：[目的]建立微波消解-石墨炉原子吸收光谱法测定凉山川牛膝中铅和镉元素含量的方法。[方法]用浓硝酸微波消解样品,选用10μl浓度2 g/LMg（NO3）2＋2 g/L NH4H2PO4和10μl浓度2 g/L NH4H2PO4作为基体改进剂,采用标准曲线法测定。[结果]采用微波消解-石墨炉原子吸收光谱法测定川牛膝中铅和镉含量RSD为4.5%~5.2%,回收率为95%~105%。经测定,凉山川牛膝牛含有铅5.24μg/g,镉1.29μg/g。[结论]采用微波消解-石墨炉原子吸收光谱法测定川牛膝中铅和镉含量方法简单、准确,结果令人满意。[Objective] The aim was to determine the content of Pb and Cd in Cyathula officinalis Kuan by using microwave digestion-graphite furnace atomic absorption spectrometry.[Methods] The samples were diluted with concentrated nitric acid（HNO3） microwave digestion;10 μl 2 g/L Mg（NO3）2,2 g/L NH4 H2 PO4 and 10 μl 2 g/L NH4H2PO4 were used as matrix modifier;finally calibration curve method was applied upon the result.[Results] Based on the determination,microwave digestion-graphite furnace atomic absorption spectrometry was used to determine the content of Pb and Cd in Cyathula officinalis Kuan,the results indicated that RSD were among 4.5%-5.2%,recovery rate were in the range of 96%-107%.The content of Pb and Cd in Cyathula officinalis Kuan were 5.24 and 1.29 μg/g,respectively.[Conclusion] To determine the content of Pb and Cd in Cyathula officinalis Kuan by using microwave digestion-graphite furnace atomic absorption spectrometry was accurate and satisfying.

关 键 词：微波消解 原子吸收光谱法 川牛膝 铅 镉 

分 类 号：O657.3[理学—分析化学]