修正值法消除国标法测定三氯乙醛时的干扰
Use of Modified Value Method to Eliminating Interference in the Determination of Trichloroacetaldehyde by National Standard Method
张丰 1樊灿辉 1刘晓颖1
作者信息
- 1. 东莞市东江水务有限公司,广东东莞523109
- 折叠
摘要
通过实验发现,采用国标方法《生活饮用水标准检验方法消毒副产物指标》(GB/T5750.10-2006)测定饮用水中三氯乙醛时,水中其他2种消毒副产物1,1,1一三氯丙酮与三氯乙酸也可在碱性条件下生成三氯甲烷使测定结果偏高.每100 μg/L的1,1,1一三氯丙酮能使三氯乙醛测定结果偏高约90μg/L;每100μg/L三氯乙酸能使三氯乙醛测定结果偏高约18 μg/L.为此,在国家标准方法的基础上采用引入修正值的做法,以消除1,1,1-三氯丙酮与三氯乙酸的干扰,使测定结果能准确反映水中三氯乙醛的浓度.
Abstract
When trichloroacetaldehyde in drinking water was detected with the national standard method,i.e.Standard Examination Methods for Drinking Water-Disinfection By-products Parameters (GB/T 5750.10-2006),it was found that 1,1,1-trichloroacetone and trichloroacetic acid (two kinds of disinfection by-products in drinking water),could generate chloroform under alkaline conditions in addition to trichloroacetaldehyde.This resulted in the high content of trichlormethane.Every 100 μg/L of 1,1,1-trichloroacetone could cause the increase of trichloroacetaldehyde by about 90 μg/L,while every 100 μg/L of trichloroacetic acid could make extra 18 μg/L of trichloroacetaldehyde.In this paper,a modified value method was introduced to eliminate the interference of 1,1,1-trichloroacetone and trichloroacetic acid to obtain the accurate trichloroacetaldehyde measurement in drinking water.
关键词
三氯乙醛/干扰物/修正值法/消除干扰Key words
trichloroacetaldehyde/disruptor/modified value method/eliminate the interference引用本文复制引用
出版年
2017
NETL
NSTL
维普
万方数据