微波消解-ICP-MS法测定土壤中的硒含量  

Determination of Selenium Content in Soil by Microwave Digestion-ICP-MS

作　　者：刘芸[1,2] 曹国松 程佩 张冬冬 张一凡 谭芳 杨小秋[1,2] 胡思前[1,2] 

机构地区：[1]江汉大学光电化学材料与器件教育部重点实验室,湖北武汉430056 [2]江汉大学化学与环境工程学院,湖北武汉430056 [3]武汉市蔡甸区农业技术推广服务中心,湖北武汉430100

出　　处：《化学与生物工程》2017年第11期67-70,共4页Chemistry & Bioengineering

基　　金：武汉市科技攻关项目(2014022905011274;IWHS2016216;03430002)

摘　　要：采集湖北省武汉市蔡甸区4个不同地块的土壤样品,利用微波消解法进行前处理,建立了一种微波消解辅助电感耦合等离子体质谱(ICP-MS)法检测土壤中硒含量的方法。确定消解试剂为2mL硝酸、3mL氢氟酸及3mL双氧水;校正曲线的线性范围为1~100μg·L^(-1),相关系数R2为0.9995;采用土壤形态成分标准物质GBW07445GSF-5进行检测,结果表明测试平均值在标准值范围内,RSD为4.4%。土壤样品检测结果发现,硒含量最高的是b区地块,为1.0702mg·kg^(-1),最低的是a区地块,为0.5807mg·kg^(-1),4个地块均达到了富硒土壤的标准。不仅为评价土壤中的硒含量提供了快速、准确、灵敏的检测方法,也为蔡甸区开发富硒特色农业种植提供了重要的科学参考。We collected soil samples from four different areas of Caidian region in Wuhan,Hubei province, which were named as area a, b, c, and d, and used a microwave digestion method to pretreat soil samples. We es- tablished a microwave digestion-ICP-MS method for the determination of selenium content in soil. The optimal digestive reagents were 2 mL nitric acid,3 mL hydrofluoric acid,and 3 mL hydrogen peroxide. The line range of calibration curve was 1~100 /~g ~ L 1 ,and R2 was 0. 9995. Moreover,we used soil morphologic element stand- ard material GBW07445 GSF-5 for the determination. The results showed that the detected average values were in the range of standard values,and RSD was 4.4~. The maximum value of selenium content in soil was 1. 0702 mg ~ kg-1 from area b,while the minimum value was 0. 5807 mg ~ kg-1 from area a. The soil from four different areas all reached the selenium-enriched soil standard. This study provides a rapid, accurate, and sensitive method for the determination of selenium content in soil, and provides scientific reference for developing selenium-en- riched agriculture for Caidian region.

关 键 词：硒 微波消解 ICP-MS 土壤 

分 类 号：TQ132.32[化学工程—无机化工]