瓶装水中痕量溴酸盐检测方法的比对—离子色谱法与快速检测法  

Determination of Trace Level Bromate in Drinking Water with Ion Chromatography and Rapid Detection Bromate Apparatus

作　　者：路会丽[1,2] 武彦文[2] 欧阳杰[1] 游辉[2] 刘玲玲[1,2] 陈舜琮[2] 

机构地区：[1]北京林业大学生物科学与技术学院食品科学与工程系,北京100083 [2]北京市理化分析测试中心,北京100089

出　　处：《现代科学仪器》2010年第4期79-81,共3页Modern Scientific Instruments

基　　金：北京市自然科学基金资助项目(7102021);科技部创新方法工作专项资助项目(2008IM041400;2009IM033200)

摘　　要：本文建立了测定水中痕量溴酸盐的离子色谱法,并与快速检测方法进行了比对实验。离子色谱法采用CIC-200型离子色谱仪,Shodex IC SI-52 4E型分析柱(250 mm×4.0 mm)分离,淋洗液为3.6 mM Na2CO3,流速0.7 mL/min,柱温为45℃,进样300μL;该方法在10～100μg/L范围内具有良好的线性关系(r>0.999),最低检出限为7.0μg/L,样品加标回收率为70.96%～97%,相对标准偏差小于4%(n=6)。快速检测方法采用GDYS-104SI溴酸盐快速检测仪,样品经微波浓缩5倍后比色测定。本文分别采用上述两种方法对市售的16种瓶装水中的溴酸盐进行检测和结果比对。结果表明两种方法的检测数据基本吻合,均能满足现有标准的检测要求。A method was developed to determine the trace bromate in drinking water by ion chromatography （IC）, comparing with the rapid detection bromate apparatus. The IC determination was performed in a Shodex IC SI-52 4E （250 mm×4.0 mm） analysis column （45℃） by 300 uL injection and using 3.6 mM Na2CO3 as a mobile phase with the flow rate of 0.7 mL/min. A good linearity of bromate was obtained within the range of 10-100 ug/L （r〉0.999）. The limit of detection for the method was 7.0 ug/L. The average recoveries of bromate were ranged from 70.96% to 97% with the relative standard deviations of less than 4% （n=6）. The drinking water sample was concentrated in a microwave oven and determinated by GDYS-104SI rapid detection bromate apparatus. The two methods were applied in the determination of trace bromate in drinking water and the feedback statistics showed that they both can meet the testing requirements.

关 键 词：溴酸盐 瓶装水 离子色谱仪 快速检测仪器 

分 类 号：TS275.1[轻工技术与工程—农产品加工及贮藏工程]