气相色谱法测定生活饮用水中2-氯苯酚和2-甲苯酚

采用固相萃取(SPE)小柱固相萃取,建立了生活饮用水中2-氯苯酚和2-甲苯酚的气相色谱检测方法。用盐酸调节水样至p H 5.0,用SPE小柱固相萃取后以乙酸乙酯洗脱,以CD-5色谱柱进行分离,氢火焰离子化检测器检测2-氯苯酚和2-甲苯酚的含量。2-氯苯酚和2-甲苯酚的质量浓度在2.00~40.0μg/L范围内与色谱峰面积线性关系良好,检出限分别为0.03,0.04μg/L;加标回收率分别为87.2%~93.9%,89.0%~94.8%;测定结果的相对标准偏差均小于2%(n=7)。该方法具有检出限低、操作简便等优点,适用于生活饮用水中2-氯苯酚和2-甲苯酚的监测分析。

Determination of 2-Chloro Phenol and 2-Methyl Phenol in Drinking Water by Gas Chromatography

By using SPE solid phase extraction, gas chromatography was set up for the determination of 2-chlorophenol and 2-methyl phenol in drinking water. The water sample was adjusted to pH 5.0 by using hydrochloric acid, with SPE solid phase extraction and ethyl acetate elution, CD–5 chromatographic column was used to separate the water sample, and hydro-genflame ionization detector was selected, 2-chlorophenol and 2-methyl phenol content were determined. The concentration of 2-chlorophenol and 2-methoxy phenol was linear with peak area in the range of 2.00–40.0μg/L with the detection limits of 0.03, 0.04μg/L, respectively. The recoveries of standard addition were 87.2%–93.9%, 89.0%–94.8%, respectively. The relative standard deviations of determination results were less than 2%(n=7). The method has the advantages of low detection limit, simple operation, etc., it is suitable for the monitoring of 2-chloro phenol and 2-methyl phenol in drinking water.