氢化物发生-原子荧光光谱法测定铅锭中的硒  

Determination of Selenium in Lead Ingots by Hydride Generation-Atomic Fluorescence Spectrometry

作　　者：唐琼[1] 陆建平[2] 庞洁[1] 文辉忠[2] 卢秀芳[2] 唐燕葵[3] 

机构地区：[1]南宁市疾病预防控制中心,广西南宁530023 [2]广西大学化学化工学院,广西南宁530004 [3]广西大学环境学院,广西南宁530004

出　　处：《分析科学学报》2014年第1期123-126,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.51168001)

摘　　要：采用硝酸溶样，在不分离大量铅基体情况下，用聚环氧琥珀酸（PESA）掩蔽基体，建立了氢化物发生-原子荧光光谱法（HG—AFS）测定铅锭中微量硒的简单、快速分析方法。研究了最佳溶样方法，探讨了PESA用量对测定结果的影响，优化了仪器的工作参数，考察了测定条件以及共存元素对测定结果的影响。实验表明，PESA可以有效地消除铅锭中基体元素Pb的干扰，铅锭中的共存离子Ca、Cu、Sb、Sn、Cr、Fe、Zn和Co不干扰Se的测定。Se的方法检出限为0．29ng／mL。该方法用于实际样品测量时结果的相对标准偏差（RSD）在0．74％～3．08％（n=5）之间，加标回收率为959／6～108％。After samples were digested with nitric acid and the matrix was masked using poly epoxy succinic acid （PESA）, a simple and fast method was established to determine the trace amount of selenium in lead ingots by hydride generation-atomic fluorescence spectrometry. The sample digestion methods and the effect of amount of PESA were investigated. The optimum conditions and influence of coexisting elements on the determination were explored. It was found that PESA could effectively eliminate the interference of matrix element Ph in the lead ingots, and Ca, Cu, Sh, Sn, Cr, Fe, Zn and Co in the samples did not interfere with the Se determination. method was applied for the determination of Se in lead 108%. The detection limit for Se was 0.29 ng/L. The ingots with the recovery in the range of 95%-108%.

关 键 词：氢化物发生-原子荧光光谱法 铅锭 硒 

分 类 号：O657.31[理学—分析化学]