衍生化—气相色谱—质谱法测定饮用水中的二甲胺  

Determination of dimethylamine in drinking water by derivatization-GC-MS

作　　者：石梦琦 李翠梅[1] 朱君妍 张绍广 孙雯[1] SHI Mengqi;LI Cuimei;ZHU Junyan;ZHANG Shaoguang;SUN Wen(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou Jiangsu 215009)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009

出　　处：《环境污染与防治》2021年第4期432-435,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.51109153);2017年苏州市水利科技项目(No.2017003)。

摘　　要：针对饮用水中二甲胺(DMA)的含量检测建立了一种适合于气相色谱—质谱(GC—MS)的衍生化方法。对预处理的衍生化温度、pH、反应时间以及萃取剂用量进行了优化。优化结果表明,DMA标准溶液处于1.00~100.00 ng/L、100~1000 pg/L时线性关系较好,检出限为0.01 ng/L,加标回收率为98.0%~102.4%,相对标准偏差≤9.29%。优化后的方法检出限低、精密度高、回收率较高,适宜用于饮用水中DMA的检测。A derivatization method suitable for GC-MS was established for the determination of dimethylamine(DMA)in drinking water.The derivatization temperature,pH,reaction time and extractant dosage in the pretreatment were optimized.The optimization results showed that the linear relationship was good when the DMA standard solution was 1.00-100.00 ng/L and 100-1000 pg/L,the detection limit was 0.01 ng/L,the recovery rate was 98.0%-102.4%,and the relative standard deviation was less than 9.29%.The improved method had low detection limit,high precision and recovery rate,it was suitable for the determination of DMA in drinking water.

关 键 词：二甲胺 衍生化 气相色谱—质谱 

分 类 号：TU991.21[建筑科学—市政工程]