阻抑动力学光度法测定痕量砷(Ⅲ)的研究  

Study on the Inhibitory Kinetic Photometric Determination of Trace Amounts of Arsenic(Ⅲ)

作　　者：艾智[1] 高翠香[2] 幺林[1] 

机构地区：[1]唐山学院环境与化学工程系,河北省唐山市华岩北路38号063000 [2]唐山市环境监测中心站,河北省唐山市063000

出　　处：《光谱实验室》2009年第1期110-113,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：唐山学院自然科学基金(070013B)资助项目

摘　　要：研究了在硫酸介质中砷()对碘化钾催化碘酸钾氧化甲酚红褪色的阻抑反应,建立了阻抑动力学光度法测定痕量砷()的方法。方法的检出限为1.08×10-9g/mL,线性范围为0—2.0μg/25mL,RSD<4%,平均回收率为98.8%。方法应用于环境水样中痕量砷的测定,结果满意。The inhibitory action of traces of As（Ⅲ） ion on the oxidation-decoloration reaction between cresolred and potassium iodate catalyzed by potassium iodide in a sulfuric acid medium was studied and adopted as a method for the determination of trace amounts of arsenic in environmental water with satisfactory results.The limit of detection is 1.08×10-9g/mL,and the linearity range is in the range of 0—2μg of As（Ⅲ） in 25mL of solution.The RSD＇s（n=9） of 6 environmental water samples is less than 4%,and the average recovery by standard addition method is 98.81%.

关 键 词：阻抑效应 动力学光度法 砷 环境水 

分 类 号：O657.32[理学—分析化学]