分光光度法同时测定水中邻苯二甲酸和邻苯二甲酸二甲酯  

SIMULTANEOUS DETERMINATION OF PHTHALIC ACID AND DIMETHYL PHTHALATE BY DUAL-WAVELENGTH SPECTROPHOTOMETRY

作　　者：颜文红[1] 叶常明[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085

出　　处：《环境化学》1995年第2期145-150,共6页Environmental Chemistry

基　　金：国家自然科学基金资助项目

摘　　要：本文用双波长等吸收紫外分光光度法,同时测定水中邻苯二甲酸(PA)和邻苯二甲酸二甲酯(DMP)的含量.实验表明:DMP和PA在1mg/1到50mg/1的浓度范围内,对于波长为216,237.6.266,292nm的吸收均满足比尔吸收定律.迭加性令人满意分析方法的回收率在DMP与PA含量比例相差较小时,其值接近100%,在相差超过9倍时,通过合理的校正,回收率也能达到90%—110%;回收率受Na^+和Cl^-影响很小,但受pH值影响很大.The method of dual-wavelength spectrophotometry was used to simultaneously determine concentrations of phthalic acid (PA)and dimethyl phthalate(DMP)in aqueous systems. The concentration ranges of PA and DMP were from 1 mg/1 to 50 mg/1. The absorptions of the two substances at four wavelengthes were totally fitted by Beer's Law. Their recovery ratioes were from' 97. 77% to 105. 6%. Both Na+ and Cl- hardly affected the results, while pH value had significant impact on the method. The method will be used in further research for kinetic hydrolysis process of DMP.

关 键 词：分光光度法 邻苯二甲酸 DMP 水 测定 

分 类 号：X132[环境科学与工程—环境科学]