YUZhi-yong,WANGJuan,HANSi-qi,et al.Gas Chromatography-Tandem Mass Spectrometry for Determination of Five Emerging Contaminants in Drinking Water[J].China Water & Wastewater,2023,39(14):148-154.
气相色谱 -串联质谱法测定饮用水中5种新污染物
- Title:
- Gas Chromatography-Tandem Mass Spectrometry for Determination of Five Emerging Contaminants in Drinking Water
- Keywords:
- drinking water; gas chromatography-mass spectrometry; high throughout analysis; emerging contaminant; liquid-liquid extraction
- 摘要:
- 为满足饮用水中1，4-二口恶烷、二氯乙腈、二溴乙腈、2，4，5-涕丙酸和二甲戊乐灵等新污染物的检测需求，对北京市主力水厂的污染水平进行调查，建立了气相色谱-串联质谱法同时测定生活饮用水及水源水中5种新污染物的分析方法。对前处理条件中的萃取剂种类、萃取剂体积和水样的盐度以及气相色谱质谱检测条件进行了优化，最终调节100 mL水样的盐度为2%，以25 mL二氯甲烷为萃取剂，富集浓缩后经HP-5 ms毛细管色谱柱分离，MRM模式定量分析。结果表明，5种新污染物的线性相关系数均大于0.999，加标回收率为73.3%~113%，检出限为0.002~0.06 μg/L，相对标准偏差为3.7%~12%。该方法适用于生活饮用水及水源水中痕量1，4-二口恶烷、二氯乙腈、二溴乙腈、2，4，5-涕丙酸和二甲戊乐灵的检测，能够满足世界卫生组织（WHO）《饮用水水质准则》的检测要求。采用该方法检测了北京市主力水厂2018年—2020年的饮用水水样，结果表明5种污染物均未检出，健康风险较低。
- Abstract:
- This paper investigated the pollution of emerging contaminants in the main water supply plants in Beijing and established a gas chromatography-tandem mass spectrometry method for simultaneous determination of five emerging contaminants in drinking water and source water, so as to meet the detection demand of 1,4-dioxane, dichloroacetonitrile, dibromoacetonitrile, fenoprop and pendimethalin in drinking water. The type, volume of the extractant, salinity of water samples, and the detection conditions of gas chromatography-mass spectrometry were optimized. The salinity of water samples with volume of 100 mL was adjusted to 2%, and dichloromethane with volume of 25 mL was used as the extractant. After enrichment and concentration, the samples were separated by HP-5 ms capillary column and analyzed quantitative by MRM mode. The linear correlation coefficients of the five emerging contaminants were all greater than 0.999, the spiked recoveries were 73.3%-113%, the detection limits were 0.002-0.06 μg/L, and the relative standard deviations were 3.7%-12%. The method is suitable for the determination of trace 1,4-dioxane, dichloroacetonitrile, dibromoacetonitrile, fenoprop and pendimethalin in drinking water and source water, and meets the testing requirements of the Guidelines for Drinking Water Quality proposed by the World Health Organization. The method was applied to detect drinking water samples from the main water supply plants in Beijing from 2018 to 2020, and the results showed that none of the five emerging contaminants were detected, indicating that the health risk was low.
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