二氯甲烷萃取与气相色谱—质谱结合新方法测定饮用水源地水中的苦味酸  

Determination of Picric Acid extracted with dichloromethane in Water by GC-MSD

作　　者：叶鹏飞 刘蕾[2] 何德文[2] 梁定民[2] 

机构地区：[1]惠州市环境监测站,广东惠州516001 [2]中南大学冶金学院环境工程系,湖南长沙410083

出　　处：《干旱环境监测》2010年第2期65-68,共4页Arid Environmental Monitoring

基　　金：惠州市科技计划项目(2008G37)

摘　　要：为建立饮用水源地中苦味酸分析测定的新方法,将10 ml水样中的苦味酸氯化后,以二氯甲烷萃取,用气相色谱—质谱法(GC—MSD)测定水中苦味酸的含量,采用保留时间定性,外标法定量。结果表明,最佳萃取时间为4 min,最佳萃取剂用量为1.5 ml,该法能快速而有效的提取并测定水中苦味酸,检出限低(0.4μg/L)、精密度(RSD=1.8%)和准确度高(加标回收率93.16%)、标准曲线线性(r=0.999)较好,能满足饮用水源地水中苦味酸的测定要求。The objective of this paper is to develop a new method for the determination of picric acid in drinking water sources.After chlorination of picric acid in 10ml water samples,the chlorinated product was extracted by dichloromethane,then determined by GC-MSD,characterized with retention time and quantified with external standard method.The results showed that the optimum extraction time was 4min and the best extraction agent was 1.5mL.The picric acid in water can be extracted and determined quickly and effectively with this method,and its detection limit was 0.4ug/L,linearity of standard curve was preferable,the method was precise,sensitive and suitable for the determination of picric acid in drinking water sources..

关 键 词：苦味酸 萃取 二氯甲烷 气相色谱—质谱 

分 类 号：X830.2[环境科学与工程—环境工程]