摘要
目的建立吹扫捕集-气相色谱质谱法测定生活饮用水中28种挥发性有机物(VOCs)。方法采用吹扫捕集法对水样中28种VOCs进行富集,热解吸后应用气相色谱质谱法分析,选择离子模式检测,外标法定量。结果在所建立的实验条件下,28种VOCs分离效果良好,检出限在0.002μg/L^0.13μg/L,加标回收率在73.4%~122.8%,精密度(RSD)在0.3%~23.1%,各化合物线性浓度在0.1μg/L^4.0μg/L,相关系数在0.998 1~0.999 6。末梢水中主要检出的挥发性有机物为三氯甲烷、一溴二氯甲烷、二溴一氯甲烷等卤代烃类化合物。结论所建立的方法简便、灵敏、准确,可用于水中28种挥发性有机物的同时测定。
Objective To established a method for the determination of 28 volatile organic compounds(VOCs)in drinking water by purge and trap-gas chromatography mass spectrometry.Methods The VOCs in water were enriched using purge and trap method,and then analyzed by GC-MS and quantified by external standard method.Results Under the established experimental conditions,the 28 VOCs were separated well,with the detection limits of 0.002 μg/L-0.13μg/L,and recovery of 73.4%-122.8%.The relative standard deviation was within 0.3%-23.1%.The linear range of VOCs was with 0.1μg/L-4.0μg/L,and correlative coefficient(r)was within 0.9981-0.9996.The main VOCs which were found in the drinking water are the by-products,such as chloroform,bromodichloromethane and chlorodibromomethane.Conclusion The method is fast,convenient and accurate.It can be applied to the simultaneous determination of 28 VOCs in water.
作者
周寅
靳尚武
祁美荣
王丽霞
李纳
ZHOU Yin;JIN Shang-wu;QI Mei-rong;WANG LI-xia;LI Na(Ordos Municipal Center for Disease Control and Prevention,Ordos,Inner Mogolia 017000,China)
出处
《中国卫生检验杂志》
CAS
2019年第21期2575-2578,共4页
Chinese Journal of Health Laboratory Technology
关键词
吹扫捕集
气相色谱质谱法
生活饮用水
挥发性有机物
Purge and trap
Gas chromatography mass spectrometry
Drinking water
Volatile organic compounds
