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.
出处
《环境化学》
CAS
CSCD
北大核心
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
关键词
分光光度法
邻苯二甲酸
DMP
水
测定
dual-wavelength spectrophotometry, phthalice acid, dimethyl phthalate.
