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.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
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)
