摘要
[目的]建立饮料中砷(As)、锡(Sn)、锑(Sb)的氢化物-原子荧光连续测定方法。[方法]以L-半胱氨酸为预还原剂,一次消解样品,应用氢化物发生-原子荧光光谱法连续测定砷、锡、锑。[结果]在该方法的最佳条件(1%HCl,2.0%KBH4,2.0%L-半胱氨酸)下,40mL/LFe3+、Pb2+,50mg/LCu2+、Mn2+、Zn2+、Se4+、Hg+、Bi3+,10mg/LCr6+、Cd2+对测定均无干扰。其回收率分别为:91.3%～97.0%、92.5%～106.1%、90.0%～106.2%;检出限分别为0.35、0.35、0.31μg/L。[结论]采用该方法分析饮料中的砷、锡、锑具有试剂用量少,污染小,检出限低,线性范围宽及干扰少等特点,适用于饮料中砷、锡、锑含量的检测。
[ Objective ] To establish a method for sequential determination of arsenic, tin and antimony in beverage by hydride generation-atomic fluorescence spectrometry. [ Methods ] In a sample digestion, the content of arsenic, tin and antimony were determined by hydride generation-atomic fluorescence spectrometry using L-Cysteine as the prereduction agent, [ Results ] Under the best conditions （ 1%HCI, 2.0%KBH4, 2.0%L-Cysteine ）for the given method, there was no interference when determining the content of arsenic, tin and antimony in the presence of 40 mL/L Fe^3＋, Ph^2＋, 50 mg/L Cu^2＋, Mn^2＋, Zn^2＋, Se^4＋, Hg^＋, Bi^3＋, and 10mg/LCr^6＋, and Cd^2＋. The recovery rates were in the ranges of 91.3%-97.0%, 92.5%-106.1%, and 90.0%-106.2% respectively. The detection limits were 0.35, 0.35, and 0.31 μg/L respectively. [ Conclusion ] This method is of characteristic that less reagent, less pollution, lower detection limit, wider linear range and less interference, therefore it is applicable to the determination of arsenic, tin and antimony in beverages.
出处
《环境与职业医学》
CAS
北大核心
2009年第5期519-521,共3页
Journal of Environmental and Occupational Medicine
关键词
连续测定
L-半胱氨酸
饮料
砷
锡
锑
sequential determination
L-Cysteine
beverages
arsenic
tin
antimony
