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食品研究与开发:2017,38(7):138-143
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吹扫捕集气相色谱-质谱法测定饮用水中 挥发性有机物
周静峰1,施家威2,何雄1
(1. 浙江医药高等专科学校 食品学院,浙江 宁波 315000;2. 宁波市疾病预防控制中心,浙江 宁波 315000)
Analysis of Volatile Organic Compounds in Drinking Water Using Purge-and-Trap/GC/MS
ZHOU Jing-feng1, SHI Jia-wei2, HE Xiong1
(1. College of Food ,Zhejiang Pharmaceutical College, Ningbo 315000, Zhejiang, China;2. Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315000, Zhejiang, China)
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投稿时间:2016-09-08    
中文摘要: 建立饮用水中 55 种挥发性有机物的吹扫捕集气相色谱质谱分析方法。采用吹扫捕集法对饮用水 55 种挥发性 有机物进行富集,热解吸后导入气相色谱-质谱仪,并选用选择离子模式(SIM)进行检测。其回收率在 87.90 %~118.03 %, 其中 40 种化合物的两个水平回收率均在 90 %~110.0 %范围;相对标准偏差均小于 10 %;进样量为 5 mL 时,方法的定 量下限(LOQ)范围为 0.006 μg/L~0.123 μg/L(S/N=10)。该方法且具有富集效率高、无试剂再污染等特点,适用饮用水中 55 种挥发性化合物的分析测定。
Abstract:The analytical method for determining 55 volatile organic compounds (VOCs) in water was estab- lished by purge and trap gas chromatography/mass spectrometry(P&T-GC/MS). The suitable method with high enrichment efficiency and no reagent re contamination for determination of 55 VOCs in water was obtained using the following optimized procedure: enriching the 55 VOCs with purge-and-trap methods, thermal desorption, 5 mL injection volume, and finally determining VOCs by gas chromatography/mass spectrometry with selection ion mode (SIM). The recovery rate of 55 VOCs ranged from 87.90 % to 118.03 %,and 40 of the 55 VOCs ranged from 90.0 % to 110.0 %, with the relative standard deviations(RSDs) were less than 10 %. The limits of quantification(LOQ)of the method were between 0.006 μg/L to 0.123 μg/L(Signal /Noise=10).
文章编号:201707031     中图分类号:10.3969/j.issn.1005-6521.2017.07.031    文献标志码:A
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