邻羟基苯基重氮氨基偶氮苯光度测定微量锌  

PHOTOMETRIC DETERMINATION OF MICRO-AMOUNTS OF ZINC WITH o-HYDROXYBENZENEDIAZOAMINOAZOBENZENE(HBDAAB) AS COLOR REAGENT

作　　者：李艳辉[1] 孙吉佑[1] 陈文宾[1] 

机构地区：[1]淮海工学院化学工程系,连云港222005

出　　处：《理化检验（化学分册）》2006年第9期751-752,755,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：淮海工学院自然科学基金资助项目(KX02014)

摘　　要：研究了在辛基苯基聚氧乙烯醚（OP）存在下，锌（Ⅱ）邻羟基苯基重氮氨基偶氮苯的显色反应，在pH10．3的硼砂-氢氧化钠缓冲溶液中，锌（Ⅱ）与试剂形成1：2的暗红色配合物，配合物的最大吸收峰位于530nm波长处，表观摩尔吸光系数为1．65×10^5L·mol^-1cm^-1。薛（Ⅱ）质量浓度在0～40μg／25mL范围内符合比耳定律。方法用于铝合金、粮食、人发及水中微量锌的测定，结果的相对标准偏差小于3．2％，回收率在97．5％-105．0％之间。In a borate buffer of pH 10. 3, and in the presence of OP, a dark reddish colored coordination complex was formed between Zn（ Ⅱ） and the color reagent HBDAAB in the mole ratio of （Zn ： R） 1： 2. Absorption maxima of the complex was found at the wavelength of 530 rim, where the molar absorptivity was found to be 1.65×10^5L . mol^-1. cm^-1. Beer＇s law was kept in the concentration range of 0--40μg of Zn（ Ⅱ ） per 25 mL of solution. The proposed method has been applied to the analysis of several kinds of samples （eg. aluminum alloy, grain, human hair, water and etc. ） for their zinc contents, giving RSD＇s less than 3.2G and recoveries in the range of 97.5%--105.0%.

关 键 词：吸光光度法 邻羟基苯基重氮氨基偶氮苯 锌 

分 类 号：O657.31[理学—分析化学]