应用内标的APDC-Cu(Ⅱ)快速共沉淀分离富集和原子吸收光谱测定食盐中的铅  

Application of Internal Standardization to Rapid Coprecipitation Technique Using APDC-Cu(Ⅱ) for FAAS Determination of Lead in Salt

作　　者：苏耀东[1] 李静[1] 黄燕[1] 陈龙武[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《光谱学与光谱分析》2006年第3期564-566,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(29973029)资助项目

摘　　要：采用APDC（吡咯烷二硫代氨基甲酸铵）-Cu（Ⅱ）共沉淀体系，以Ni（Ⅱ）为内标，在pH2．5的条件下快速共沉淀分离富集食盐中的铅，并用火焰原子吸收法（FAAS）测定。当试液为100mL时方法的检测限为3.27×10^-3μg·mL^-1，回收率为92％～101％，基本消除了基体干扰。该法快速、简便、重现性好。A method was proposed for the determination of trace lead in salt with flame atomic absorption spectrometry after preconcentration of lead by rapid coprecipitation technique with APDC-Cu（ Ⅱ ） using nickel as an internal standard at pH 2. 5. The standard addition recovery of lead is between 92%-101%. The detection limit is 3. 27×10^-3μg·mL^-1 when the sample volume is 100 mL. The effect of matrix can be overcome by the method, and the results are satisfying. The method proposed here is rapid and has good reproducibility.

关 键 词：铅 快速共沉淀 内标法 原子吸收光谱 分离富集 

分 类 号：O657.3[理学—分析化学]