气相色谱—质谱法测定生活饮用水中多氯联苯

陆一夫; 依力哈木扎依尔; 胡小键; 朱英; 杨艳伟

doi:10.13421/j.cnki.hjwsxzz.2021.02.017

气相色谱—质谱法测定生活饮用水中多氯联苯

Determination of Polychlorinated Biphenyls in Drinking Water by GC-MS

摘要

摘要:
目的建立生活饮用水中多氯联苯（polychlorinated biphenyls，PCBs）的气相色谱—质谱测定法。
方法水样采用C₁₈固相萃取柱富集，用二氯甲烷和乙酸乙酯洗脱，氮吹浓缩后进样分析。
结果 18种PCBs在（0.01~0.40）μg/L范围内其相关系数均≥0.99，方法检出限范围为（0.000 3~0.001 7）μg/L，定量限范围为（0.001 2~0.006 8）μg/L，回收率范围为85.1%~117%，RSD为1.08%~9.51%。
结论该方法适用性强、准确度高、稳定可靠，满足生活饮用水中PCBs的限值要求，适用于生活饮用水中PCBs的测定。

Abstract:
Objective To establish a method for the determination of polychlorinated biphenyls in drinking water by gas chromatography-mass spectrometry (GC-MS).
Methods Domestic drinking water samples were treated by a C₁₈ solid-phase extraction column and eluted with dichloromethane and ethyl acetate, and then the final eluate was concentrated with nitrogen and analyzed.
Results A total of 18 polychlorinated biphenyls showed a correlation coefficient of ≥ 0.99 within the range of (0.01-0.40)μg/L. The detection limit of the method was (0.000 3-0.001 7)μg/L, and the limit of quantification cation was (0.001 2-0.006 8)μg/L. The recovery rate ranged from 85.1%-117% and the relative standard deviation ranged from 1.08%-9.51%.
Conclusion The GC-MS method has good applicability, accuracy, stability, and reliability and can meet the detection limits for polychlorinated biphenyls in drinking water, and therefore, it is suitable for simultaneous determination of polychlorinated biphenyls in drinking water.

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