大体积直接进样离子色谱法测定饮用水中痕量溴酸盐  

Determination of Bromate in Drinking Water by Ion Chromatography with Large Volume Direct Injection

作　　者：史亚利[1] 蔡亚岐[1] 刘京生[1] 牟世芬[1] 温美娟[2] 

机构地区：[1]中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室,北京100085 [2]北京科技大学化学系,北京100083

出　　处：《分析化学》2005年第8期1077-1080,共4页Chinese Journal of Analytical Chemistry

基　　金：国家重点基础研究计划(973)项目资助课题(No.2003CB415001)

摘　　要：建立了一种无需样品前处理,直接大体积进样,电导检测饮用水中痕量溴酸盐的离子色谱新方法.分析柱为容量高、亲水性强的Dionex IonPac AS19阴离子交换柱,EG40在线产生KOH淋洗液,等浓度泵作梯度淋洗.该方法对溴酸盐的检出限为0.2 μg/L;在1～100 μg/L范围内具有良好的线性(r＝0.9996).将该方法用于北京市自来水和市售瓶装水样品中痕量溴酸盐的检测,实际样品的加标回收率在90%～106%之间;1 μg/L溴酸盐连续进样10次,相对标准偏差(RSD)为5.7%.A new method was developed for determination of trace bromate in drinking water by ion chromatography with large volume direct injection and without pretreatment. The separation of the bromate was achieved on IonPac AS19 column with KOH as gradient eluent and the detection was performed by a conductivity detection. A 1000 μL sample loop was used for injection. And the eluent was run at a flow-rate of 1.0mL/min. The detection limit of bromate was decreased to 0.2μg/L. The method was applied to the detection of bromate in Beijing＇s drinking water and three kinds of bottled drinking water. The recoveries of spiked standard were 90% - 106%. RSD of the peak area for the ten successive injections of 1μg/L bromate solution was 5.7%.

关 键 词：大体积直接进样 离子色谱法 饮用水 痕量分析 溴酸盐 

分 类 号：O657.75[理学—分析化学] O661.1[理学—化学]