摘要
为了同时测定有害元素铅（Ｐｂ）和镉（Ｃｄ），建立了以电荷耦合器件（ＣＣＤ）作为阵列光信号探测器，小型多色仪和专用微机组成的分光光度装置，研究了Ｍｅｓｏ－四（４－三甲铵苯基）卟啉与Ｐｂ和Ｃｄ显色反应的最佳条件。测定了合成试样、陶瓷及搪瓷食品容器浸泡液中Ｐｂ２＋、Ｃｄ２＋的含量，加标回收率为８４．４％～１１８．６％，平均回收率为１００．８％，相对标准偏差小于９．１％。本法较常规分光光度法更为灵敏、准确、快速，并具有多组份同时测定的优点。
A new spectrophotometric setup for simultaneous determination of lead and cadmium has been developed. It is composed of charge coupled device (array detector), multichromatic instrument and computer. The optimum chromogenic conditions of mesotetra (4trimethylammoniumphenyl) porphine (TAPP) with cadmium and lead were studied and reported in this paper. The linear ranges of Pb and Cd were 00.50μg/ml and 00.20μg/ml respectively. The detection limits were 0.001 μg/ml for both Pb and Cd. The proposed method has been successfully applied to the simultaneous determination of cadmium and lead in the synthetic samples and the soaking solutions of ceramics and enamel. The recoveries of spiked samples ranged from 84.4%118.6% and the average recovery was 100.8% with RSD of 1.0%9.1%. The proposed method is more sensitive, more accurate and faster than the traditional one, it can be used to simultaneously determine multiple elements.
出处
《华西医科大学学报》
CSCD
1998年第3期343-346,共4页
Journal of West China University of Medical Sciences
基金
国家自然科学基金
关键词
CCD-二级管陈列
分光光度法
铅
镉
食品卫生
CCDdiode array spectrophotomitry Lead Cadmium Mesotetra (4trimethylammoniumphenyl) porphine (TAPP)
