摘要
本文建立了一种无需样品前处理,直接进样,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Dionex IonPac AS19阴离子交换拄,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0.3μg/L,在1-100μg/L范围内具有良好的线性(r=0.9999)。将该方法用于桐乡市自来水和市售桶装水样品中痕量溴酸盐的检测,实际样品的加标回收率在94.5%-108.4%之间,1μg/L溴酸盐连续进样10次相对标准偏差(RSD)为6.25%。
A new method was developed for determination of trace bromate in drinking water by ion chromatography with 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 500 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 0.3 μg/L. The method was applied to the detection of bromate in Tongxiang＇s drinking water and three kinds of bottled drinking water. The recoveries of spiked standard were 94.5% - 108.4%. RSD of the peak area for the ten successive injections of μg/L bromate solution was 6.25%.
出处
《现代科学仪器》
2008年第2期108-109,113,共3页
Modern Scientific Instruments
关键词
溴酸盐
离子色谱
饮用水
Bromate
ion chromatography
drinking water
