LIULi-jing,YANG Yan,ZHANGWen-ting.Ion Chromatography for Detection of Bromate, Chlorate and Perchlorate in Bottled Water[J].China Water & Wastewater,2023,39(6):134-138.
离子色谱法测定瓶装水中溴酸盐、氯酸盐和高氯酸盐
- Title:
- Ion Chromatography for Detection of Bromate, Chlorate and Perchlorate in Bottled Water
- Keywords:
- ion chromatography; bromate; chlorate; perchlorate; bottled water
- 摘要:
- 建立了离子色谱法同时测定瓶（桶）装饮用水中溴酸盐、氯酸盐和高氯酸盐的方法。选用Ionpac AS20阴离子分析柱，在线产生5~55 mmol/L KOH淋洗液，流速1.00 mL/min，柱温30 ℃，抑制器电流137 mA，进样体积500 μL，电导检测器检测。应用该方法检测50份市售瓶（桶）装饮用水，结果表明，溴酸盐、氯酸盐和高氯酸盐在0.005~0.500 mg/L范围内线性良好，相关系数均大于0.999 0，测定结果精密度高（RSD<1.0%）；溴酸盐、氯酸盐和高氯酸盐的方法检出限分别为1.5、1.0、1.5 μg/L；定量限分别为5.0、3.3、5.0 μg/L；回收率分别为87.0 %~101.5%、93.4 %~118.0%和90.9%~114.0%。50份瓶（桶）装饮用水中，溴酸盐、氯酸盐和高氯酸盐检出率分别为40.0%、66.0%、14.0%，均未超标。该方法快速、灵敏、准确，适用于瓶（桶）装饮用水中溴酸盐、氯酸盐和高氯酸盐的同时检测。
- Abstract:
- This paper established a method of ion chromatography for simultaneous determination of bromate, chlorate and perchlorate in bottled water. The anion column was Ionpac AS20. 5-55 mmol/L KOH eluent was generated online, the flow rate was 1.00 mL/min, the column temperature was 30 ℃, the electric current of suppressor was 137 mA, and the sample volume was 500 μL. The sample was detected by a conductivity detector. The method was applied to detect 50 commercial bottles of drinking water. This method had good linear relation for bromate, chlorate and perchlorate in the range of 0.005-0.500 mg/L. The correlation coefficients were all greater than 0.999 0, and the precision was high (RSD<1.0%). The detection limits of bromate, chlorate and perchlorate were 1.5 μg/L, 1.0 μg/L and 1.5 μg/L, respectively, the quantitative limits were 5.0 μg/L, 3.3 μg/L and 5.0 μg/L, respectively, and the recovery rate were 87.0%-101.5%, 93.4%-118.0% and 90.9%-114.0%, respectively. The detection rates of bromate, chlorate and perchlorate in 50 bottles of drinking water were 40.0%, 66.0% and 14.0%, respectively, none of which exceeded the standard. This method is rapid, simple, sensitive and is suitable for simultaneous detection of bromate, chlorate and perchlorate in bottled water.
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