高压密闭罐溶样-氢化物原子荧光法测定环境样品中的硒  

DETERMINATION OF TOTAL SELENIUM IN ENVIRONMENTAL SAMPLES BY HYDRIDE GENERATION-ATOMIC FLUORESCENCE SPECTROMETRY WITH PTFE BOMB

作　　者：朱建明[1] 李璐[1] 秦海波[1] 李社红[1] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002

出　　处：《矿物学报》2008年第2期187-190,共4页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(批准号:40573050);教育部留学回国人员科研启动基金资助项目

摘　　要：使用浓HNO，＋HF混合液和浓HNO，液分别在高压密闭罐中消解土壤、沉积物、岩石和植物样品，6mol／LHCL加热还原样品后用氢化物发生-原子荧光光谱法（HG-AFS）测定样品中的硒。使用该法对土壤标准参考物质GSS-4、GSS-5、GSS-6、GSS-7和植物标准GSV-1、GSV-3进行了分析，硒的测定结果与推荐值一致。加标回收实验的回收率在98．0％～101．4％，平均为99．8％。实测样品中的硒与中子活化分析（NAA）和氢化物-多接受杯质谱计（HG-MC-ICP-Ms）的分析结果基本一致，表明该法平行样的重现性好，分析速度快，提高了硒分析的准确度和分析精度。The analytical method for rapidly determining total selenium in environmental samples has been established. Soil, sediment, rock and plant samples were digested with concentrated HNO3 ＋ HF or HNO3 in screw top PTFE-lined stainless steel bombs at 155 ℃ for 16 hours or 6 hours, the solution was evaporated till dryness and then dissolved with 6 mol/L HCL at 100 ℃ for 45 minutes. Selenium was determined by HG-AFS. Six standard reference materials of soil and plant （ GSS-4, -5, -6, -7 and GSV-1, -3） were studied. The results are consistent with the reference values. The recovery of selenium in spiked certified reference materials ranged from 98.0%-101.4% with an average of 99.8%. Selenium in real duplicate samples was also determined, whose results coincide with those by NAA and HG-MC-ICP-MS. This method has the advantages of time saving, and high accuracy and precision for analyzing total Se in environmental samples.

关 键 词：硒 环境样品 快速分析 氢化物-原子荧光法 

分 类 号：O613.52[理学—无机化学] O657.31[理学—化学]