离子色谱法同时测定生活饮用水中的氯酸盐和亚氯酸盐  

Simultaneous Determination of Chlorate and Chlorite in Drinking Water by Ion Chromatography

作　　者：任海龙 王丽萍 REN Hailong;WANG Liping(Xinxing Vocational And Technical College,Xinxing 839000,China;Kelamayi City Water Co.,Ltd.,Kelamayi 834000,China)

机构地区：[1]新星职业技术学院,新疆新星839000 [2]克拉玛依市水务有限责任公司,新疆克拉玛依834000

出　　处：《食品安全导刊》2024年第35期47-50,共4页China Food Safety Magazine

摘　　要：二氧化氯消毒是常用的居民饮水消毒方式,其主要消毒副产物为氯酸盐和亚氯酸盐,这两种物质是水质常规检测的重要指标,对人体健康具有较大危害。基于此,本文建立同时测定生活饮用水中氯酸盐和亚氯酸盐的离子色谱法。实验中选择IonPac AS13色谱柱,氢氧化钾溶液为淋洗液,设置淋洗液流速为1.0 mL·min^(-1),样品进样量为25μL,电导检测池和色谱柱温度均为30˚C,抑制器抑制模式为自动再生模式,电流为50 mA。结果表明,氯酸盐和亚氯酸盐在0~1.0 mg·L^(-1)线性关系良好,R^(2)≥0.9990,氯酸盐检出限为0.005 mg·L^(-1);亚氯酸盐检出限为0.0024 mg·L^(-1)。该方法操作简单、灵敏度高、准确性好,能同时测定生活饮用水中的氯酸盐和亚氯酸盐的含量。Chlorine dioxide disinfection is a commonly used disinfection method in residential drinking water.Its main disinfection by-products are chlorate and chlorite,which are important indicators for routine water quality testing and pose significant risks to human health.Based on this,this article establishes an ion chromatography method for simultaneous determination of chlorate and chlorite in drinking water.In the experiment,IonPac AS13 chromatographic column was selected,potassium hydroxide solution was used as the eluent,the eluent flow rate was set to 1.0 mL·min^(-1),the sample injection volume was 25μL,the conductivity detection cell and chromatographic column temperature were both 30℃,the inhibitor inhibition mode was automatic regeneration mode,and the current was 50 mA.The results showed that there was a good linear relationship between chlorate and chlorite in the concentration range of 0~1.0 mg·L^(-1),with R^(2)≥0.9990 and a detection limit of 0.005 mg·L^(-1) for chlorate;the detection limit of chlorite is 0.0024 mg·L^(-1).This method is simple to operate,highly sensitive,and accurate,and can simultaneously determine the content of chlorate and chlorite in drinking water.

关 键 词：离子色谱法 氯酸盐 亚氯酸盐 生活饮用水 

分 类 号：TU991.21[建筑科学—市政工程] O657.7[理学—分析化学]