示波极谱法测定人发中的铅  

Determination of Lead from Human Hair by Oscilloscopic Polarography

作　　者：毛云[1] 施永生[1] 王俊桃[2] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093 [2]长安大学环境工程学院,西安710064

出　　处：《云南化工》2004年第1期32-35,共4页Yunnan Chemical Technology

基　　金：云南省自然科学基金资助项目(2001E0020M)

摘　　要：　采用了HNO3 HClO4消化样品,盐酸溶解后在酒石酸 碘化钾 抗坏血酸体系中,铅(Ⅱ)于-0.54V得到一灵敏的一阶导数吸附催化波。铅在0.025～3μg/mL范围内,峰高与铅(Ⅱ)质量浓度之间呈良好的线性关系,检出下限为0.025μg/mL。加入标准平均回收率为91.3%～105%。此方法具有灵敏、准确、快速等特点,适用于人发和食品中微量铅的测定。Determination of lead from human hair by oscilloscopic polarography was described. Samples were digested with nitric acid- perchloric acid and dissolved in hydrochloric acid. Lead (Ⅱ) showed a sensitive absorption catalytic wave at -0.54 volt in the system of tartaric acid- potassium iodate- ascorbic acid. The peak value displayed good linear dependence with concentration of lead (Ⅱ) in the range of 0.025～3?μg/mL, with average recovery rate of 91.3%～105%. The method was sensitive, accurate, rapid and suitable for the determination of trace lead from human hair and food.

关 键 词：人发 铅 示波极谱法 底液 酸度 汞柱高度 

分 类 号：R446.1[医药卫生—诊断学] O657.14[医药卫生—临床医学]