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目的:采用离子色谱-质谱联用技术分析东莞市饮用水中高氯酸盐含量,以评价东莞市饮水中高氯酸盐的污染状况。方法:采用20 mmol/L KOH淋洗液,以高容量、强亲水性IonPac AS20分离柱分离,选择质荷比为99、101的特征离子进行单极质谱检测,对东莞市市级及镇区各水厂水源水、出厂水及东莞市内销售的瓶装水的高氯酸盐含量进行检测。结果:高氯酸盐(m/z99)在0.1μg/L～25.0μg/L范围内,方法的线性范围、精密度和回收率均符合定量要求。东莞市部分地区的水源水和饮用水中的高氯酸盐检出,但含量均低于10.42μg/L。结论:东莞市饮用水中存在高氯酸盐污染问题。
OBJECTIVE: To analyze the content of perchlorate in drinking water in Dongguan City by ion chromatography-mass spectrometry to evaluate the pollution of perchlorate in drinking water in Dongguan. Methods: 20 mmol / L KOH elution solution was used to separate high performance hydrophilic IonPac AS20 column. Monofunctional mass spectrometry (MS / MS) District water source water plant, water and Dongguan City, the sale of bottled water perchlorate content testing. Results: The linear range, precision and recovery of perchlorate (m / z 99) in the range of 0.1μg / L ~ 25.0μg / L all met the quantitative requirements. Perchlorate in tap water and drinking water was detected in some areas of Dongguan City, but the content was lower than 10.42 μg / L. Conclusion: There is a problem of perchlorate pollution in drinking water in Dongguan City.