阻抑动力学光度法测定痕量苯酚的研究  

SPECTROPHOTOMETRIC DETERMINATION OF TRACE ARSENIC WITH THE COLOUR REACTION OF METHYL GREEN-HETEROPOLYMOLYBDOARSENIC ACID

作　　者：黄志勇[1] 陈国树[1] 彭在姜[1] 

机构地区：[1]南昌大学化学系

出　　处：《南昌大学学报（理科版）》1997年第3期282-287,292,共7页Journal of Nanchang University(Natural Science)

摘　　要：研究发现，在硫酸介质中，痕量苯酚能灵敏地阻抑高碘酸钾氧化中性红褪色的指示反应。研究该阻抑褪色反应的最佳条件及动力学参数，建立了一种新的测定痕量苯酚的方法。本方法的测定范围为００～１０μｇ／２５ｍＬ苯酚，检测限为４１４３×１０－１１ｇ／ｍＬ苯酚。用于环境水样中苯酚的测定，获得满意的结果。In the presence of polyvinyl alcohol,spectrophotometric deterimination of arsenic with an ion pair of methyl green-heteropolymolybdarsenic acid is studied.A high sensitivity and convenient spectrophotometric method for determination of trace arsnic is suggested.The ion-association exhibits maximum absorption at 655 nm and the apparent molar absorptivity is 1.42×10 5L·mol -1 .The proposed method has been applied successfully to the determination of trace of arsenic in drinking water and industrial waste water.

关 键 词：阻抑 动力学光度法 苯酚 

分 类 号：O625.312[理学—有机化学] O657.32[理学—化学]