氢化物发生-原子荧光光谱法测定人发中砷  

HG-AFS Determination of Arsenic in Human Hair

作　　者：刘碧君[1,2] 吴丰昌[3] 邓秋静[1,2] 莫昌琍[1,2] 符志友[1,2] 朱静[1,2] 黎文[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,贵阳550002 [2]中国科学院研究生院,北京100049 [3]中国环境科学研究院国家环境保护湖泊污染控制重点实验室,北京100012

出　　处：《理化检验（化学分册）》2010年第7期775-777,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：中国科学院知识创新工程重要方向项目(kzcx2-yw-102);国家自然科学基金项目(40525011;40632011;40740440016);贵州省科学技术基金项目(黔科合J字[2007]2172号)

摘　　要：采用氢化物发生-原子荧光光谱法测定人发样品中砷的含量。样品经硝酸-高氯酸(10+1)混合酸消解,以盐酸(5+95)溶液为反应介质,20 g.L-1硼氢化钾-5 g.L-1氢氧化钾的混合溶液为还原剂。对测定的影响因素:仪器的负高压、灯电流、载气和屏蔽气的流量;预还原剂的浓度,共存离子的干扰等试验条件作了研究并予以优化。方法的检出限(3s)为0.006 0μg.g-1。应用此法对标准物质(GBW 07601)进行分析,测定值与标准值相一致。HG-AFS was applied to the determination of arsenic in human hair. Sample was digested with mixture of HNO3 and HC104 （10-1-1）, and determined in a medium of HC1（5-1-95） solution using the mixed solution of 20 g·L^-1 KBH4 and 5g·L^-1 KOH as reducing reagent. Influential factors, including negative high-voltage, lamp current, the flow-rates of carrier gas and shielding gas, concentration of pre-reduction agent, and interferences of coexisting ions were studied and optimized. Detection limit （3s） of the method found was 0. 006 0 ug·g^-1. The proposed method was applied to the analysis of a standard reference material （GBW 07601）, giving results in consistency with standard values.

关 键 词：氢化物发生-原子荧光光谱法 人发 砷 

分 类 号：O657.31[理学—分析化学]