微波消解-ICP-MS测定土壤及植物中硒的含量

Determination of Selenium in Soil and Plant by Microwave Digestion-ICP-MS

建立微波消解电感耦合等离子体质谱（ ICP－MS）测定土壤及植物中硒的分析方法。对土壤样采用硝酸－氢氟酸、植物样采用硝酸作为消解液进行微波消解，用ICP－MS 测定样品中的硒含量。该方法对菠菜GSB－6（ GBW10015）和土壤ESS－3（ GSBZ50013－88）标准参考物质中硒进行分析结果与标准值相符合，相对误差分别为7．6％和10．5％。用于实际土壤样品和植物样品中硒的测定，该方法的检出限为0．20μg／L，其相对标准偏差RSD＜10％，加标回收率介于92％～108％之间。为土壤和植物样品中硒的分析测试提供了一种简便、快速、准确、可靠的方法。

A method was developed to analyze selenium in soil and plan by inducted coupled plasma mass spectrometry（ICP-MS）.The soil samples were digested by nitrate-hydrofluoric acid and plan samples was digested by nitrate in a microwave and measured by ICP-MS.The results of spinach GSB-6 （ GBW10015 ） and soil ESS-3 （ GSBZ50013-88 ） references were in the range of standard values, and the relative error were 7.6% and 10.5%, respectively.The detection limit was 0.20μg/L and the relative standard deviation was less than 10%.The recovery rate was between 92%~108%.This method was a simple, quick, accurate and reliable way to measure selenium in soil and plan.