摘要
在酸性条件下 ,铅 ( )与玫瑰红酸钠形成紫红色络合物沉淀 ,该沉淀能被均匀地抽滤到一定表面积的滤纸上。本文采用固相反射散射分光光度法直接测定滤纸上负载的络合物的反射吸收值 AR,铅的含量在 0～ 8μg/ m L的范围内 AR与浓度有良好的线性关系。方法简便、快速 ,检出限为 0 .0 5μg/ m L。相对标准偏差为3.0 %。方法用于化妆品中铅的测定 。
A new solid phase reflection diffusion spectrophotometric method for the determination of lead in cosmetics is studied.In acid medium,lead and sodium dihydroxydiquinoyl can form a stable red complex precipitation.This precipitation can be filtered to the filter paper.Its maximum reflection adsorption wave length is at 530nm.In the range of 0~8μg/10mLpb,there is a good linear relationship between A R and C. The determination limit is 0.05μg/mL,and the RSD is 3.0%.This method has been successfully used in determination of lead in cosmetics.
出处
《环境科学与技术》
CAS
CSCD
2001年第2期44-45,15,共3页
Environmental Science & Technology
