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1,1,1-三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100μg/L的1,1,1-三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18μg/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。
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 addi- tion to trichloroacetaldehyde. This resulted in the high content of trichlormethane. Every 100μg/L of 1,1,1-trichloroacetone could cause the increase of trichloroacetaldehyde by about 90 μg/L, while every 100μg/L of trichloroacetic acid could make extra 18μg/L of trichloroacetaldehyde. In this paper, a modified value method was introduced to eliminate the interference of 1,1,1-trichloroacetone and trichlo- roacetic acid to obtain the accurate trichloroacetaldehyde measurement in drinking water.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第14期111-115,共5页
China Water & Wastewater
关键词
三氯乙醛
干扰物
修正值法
消除干扰
trichloroacetaldehyde
disruptor
modified value method
eliminate the interfer enee
