Determination of volatile chlorinated hydrocarbons in water samples by static headspace gas chromatography with electron capture detection: Gas Chromatography
Determination of volatile chlorinated hydrocarbons in water samples by static headspace gas chromatography with electron capture detection: Gas Chromatography
复制标题
采用电子捕获检测静态顶空气相色谱法测定水样中的挥发性氯代烃：气相色谱法
DOI：
10.1002/jssc.201500771
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发表时间：
2016
影响因子：
3.1
通讯作者：
Zhang, Yurong
中科院分区：
文献类型：
--
作者：
Li, Tiejun;Guo, Yuanming;Hu, Hongmei;Zhang, Xiaoning;Jin, Yanjian;Zhang, Xiaojun;Zhang, Yurong
介绍了一种简单、高效、无溶剂、商业化的静态顶空进样-气相色谱-电子捕获检测法测定水样中5种挥发性氯代烃的方法。对所提出的静态顶空进样方法进行了初步优化，发现最佳实验条件为：将10 mL含20%w/v氯化钠的水样置于20 mL小瓶中，在50 ℃下搅拌20 min。方法的线性范围为二氯甲烷1.2-240 μ g/L，三氯甲烷0.2-40 μg/L，三氯乙烯0.025 - 5 μ g/L，四氯乙烯0.01-2 μg/L，决定系数0.9979 - 0.9990。方法的检出限在0.001 ~ 0.3 μg/L之间。用外标法对椒江口纯水、自来水、海水和小门岛沃茨中5种挥发性氯代烃进行了不同浓度水平的加标，其相对回收率分别为91- 116%、96- 105%、86- 112%和80- 111%，相对标准偏差分别为1.9- 3.6%、2.3 ~ 3.5%、2.3 ~ 3.5%，1.5- 2.7%和2.3-3.7%（n= 5）。在真实的水样（即，纯净水、自来水和海水等）并且获得了相当的效率。该方法可用于不同水样中挥发性氯代烃的测定。
A simple, efficient, solvent‐free, and commercial readily available approach for determination of five volatile chlorinated hydrocarbons in water samples using the static headspace sampling and gas chromatography with electron capture detection has been described. The proposed static headspace sampling method was initially optimized and the optimum experimental conditions found were 10 mL water sample containing 20% w/v sodium chloride placed in a 20 mL vial and stirred at 50ºC for 20 min. The linearity of the method was in the range of 1.2–240 μg/L for dichloromethane, 0.2–40 μg/L for trichloromethane, 0.005–1 μg/L for perchloromethane, 0.025–5 μg/L for trichloroethylene, and 0.01–2 μg/L for perchloroethylene, with coefficients of determination ranging between 0.9979 and 0.9990. The limits of detection were in the low μg/L level, ranging between 0.001 and 0.3 μg/L. The relative recoveries of spiked five volatile chlorinated hydrocarbons with external calibration method at different concentration levels in pure, tap, sea water of Jiaojiang Estuary, and sea water of waters of Xiaomendao were in the range of 91–116, 96–105, 86–112, and 80–111%, respectively, and with relative standard deviations of 1.9–3.6, 2.3–3.5, 1.5–2.7, and 2.3–3.7% (n= 5), respectively. The performance of the proposed method was compared with traditional liquid–liquid extraction on the real water samples (i.e., pure, tap, and sea water, etc.) and comparable efficiencies were obtained. It is concluded that this method can be successfully applied for the determination of volatile chlorinated hydrocarbons in different water samples.