偶氮类试剂在分光光度法测定水中重金属的应用  

Application of Azo Chromogenic Reagents in Determination of Heavy Metals in Water by Spectrophotometry

作　　者：王少伟 张媛媛 张升晓[2] WANG Shaowei;ZHANG Yuanyuan;ZHANG Shengxiao(Yantai Ecological Enviroment Monitoring Center of Shandong Province,Yantai 264004,China;School of Chemistry and Materials Science,Ludong University,Yantai 264039,China)

机构地区：[1]山东省烟台生态环境监测中心,山东烟台264004 [2]鲁东大学化学与材料科学学院,山东烟台264039

出　　处：《鲁东大学学报（自然科学版）》2021年第4期343-347,共5页Journal of Ludong University:Natural Science Edition

基　　金：国家自然科学基金(21207059)。

摘　　要：本文分别以1-(2-吡啶偶氮)-2-萘酚-6-磺酸(PAN-S)、4-(2-吡啶偶氮)间苯二酚(PAR)和2,7-双(2-苯胂酸-1-偶氮)变色酸(偶氮胂Ⅲ)作为显色剂构建了分光光度体系,测定了水质中的铜、钴、铅和锌等金属离子。实验中对所用的分光体系的最大吸收波长、缓冲溶液pH和体积的选择、显色剂体积、显色时间等进行了比较和优化,并建立了标准曲线,测定样品结果和ICP-MS的结果比较,具有较高的准确性。In this paper,1-(2-pyridylazo)-2-naphthol-6-sulphonic acid(PAN-S),4-(2-pyridylazo)resorcinol(PAR)and Arsenazo Ⅲ were used as azo chromogenic reagents to develop spectrophotometric systemsfor the determination ofcopper,cobalt,lead and zinc in water.The maximum absorption wavelength,pH and volume of buffer solution,volume of chromogenic agent,and chromogenic time were compared and optimized.The fitting curves of each spectrophotometric system were established,and the determination results were compared with the results determined with a ICP-MS,showing high accuracy.

关 键 词：分光光度法 偶氮类 PAN-S PAR 偶氮胂Ⅲ 

分 类 号：X832[环境科学与工程—环境工程]