李琰, 丁克颖, 宁文吉. 吹扫捕集-气质联用法同时测定生活饮用水中86种挥发性有机物[J]. 环境与职业医学, 2017, 34(4): 341-349. DOI: 10.13213/j.cnki.jeom.2017.16723
引用本文: 李琰, 丁克颖, 宁文吉. 吹扫捕集-气质联用法同时测定生活饮用水中86种挥发性有机物[J]. 环境与职业医学, 2017, 34(4): 341-349. DOI: 10.13213/j.cnki.jeom.2017.16723
LI Yan, DING Ke-ying, NING Wen-ji. Determination of 86 volatile organic compounds in drinking water using purge and trap in combination with gas chromatography-mass spectrometry[J]. Journal of Environmental and Occupational Medicine, 2017, 34(4): 341-349. DOI: 10.13213/j.cnki.jeom.2017.16723
Citation: LI Yan, DING Ke-ying, NING Wen-ji. Determination of 86 volatile organic compounds in drinking water using purge and trap in combination with gas chromatography-mass spectrometry[J]. Journal of Environmental and Occupational Medicine, 2017, 34(4): 341-349. DOI: 10.13213/j.cnki.jeom.2017.16723

吹扫捕集-气质联用法同时测定生活饮用水中86种挥发性有机物

Determination of 86 volatile organic compounds in drinking water using purge and trap in combination with gas chromatography-mass spectrometry

  • 摘要: 目的 建立生活饮用水中86种挥发性有机物的测定方法。

    方法 通过优化吹扫捕集条件(吹扫温度、吹扫时间、脱附时间)、气相色谱-质谱条件(定性、定量离子的选择),采用吹扫捕集-气相色谱质谱联用法,使用选择离子监测模式,内标法定量,快速测定生活饮用水中二氟二氯甲烷、一氯甲烷、氯乙烯等共86种挥发性有机物。

    结果 86种挥发性有机物分离效果较好;方法检出限为0.03~0.10μg/L;平均回收率为75.1%~114%;相对标准偏差为0.33%~12.3%。

    结论 该方法具有高通量、灵敏度高、精密度好、准确度高、操作便捷、分析周期短的优点,可以满足同时测定生活饮用水中多种挥发性有机物的检测要求。

     

    Abstract: Objective To establish a method for determination of 86 volatile organic compounds in drinking water.

    Methods By optimizing purge and trap conditions (purge temperature, purge time, and desorption time) and gas chromatographymass spectrometry conditions (qualitative and quantitative ion selection), as well as using selected ion monitoring mode and internal standard method, a method of purge and trap in combination with gas chromatography-mass spectrometry was established for rapid determination of 86 volatile organic compounds including difluorodichloromethane, chloromethane, and vinylchloride.

    Results The studied 86 volatile organic compounds were well separated, with the detection limits of the method between 0.03-0.1 μg/L, the average recovery rates between 75.1%-114%, and the relative standard deviations between 0.33%-12.3%.

    Conclusion The proposed method is featured by high throughput, sensitivity, precision, accuracy, and convenience, and short analytical cycle; therefore, it is suitable for simultaneous determination of various volatile organic compounds in drinking water.

     

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