离子色谱法测定面粉制品中溴酸盐残留研究  

Determination of bromate residue in flour products by ion chromatography

作　　者：邬晨阳[1] 马建明[1] 龚文杰[1] 赵立达[1] 

机构地区：[1]浙江省慈溪市疾病预防控制中心,浙江慈溪315300

出　　处：《中国卫生检验杂志》2008年第9期1784-1785,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立面粉制品中溴酸盐残留的离子色谱测定方法。方法：样品经水提取,C18固相萃取小柱和银柱联合净化处理后进行色谱分析,采用IonPac AS19型阴离子分离柱（250 mm×2 mm）和ASRS-ULTRAII 2 mm阴离子抑制器,经氢氧化钾溶液梯度洗脱后,以ED50抑制电导检测器进行检测。结果：溴酸盐在0-200.0 mg/L具有良好的线性,相关系数为0.9991,检出限为0.01 mg/kg,回收率为82.8%-101.0%,RSD小于5.0%。结论：建立的方法可满意地用于面粉制品中溴酸盐残留的测定,具有操作简便、快速、准确的优点。Objective：To establish an analytical method for the determination of bromate residue in flour products by ion chromatography（IC）.Methods：The bromate was extracted from sample by water,cleaned up by a C18 solid-phase extraction（SPE） column and a silver column,then determined by ion chromatography coupled with a ED50 suppressed conductivity detector.The chromatographic separation was performed on an IonPacAS19 analytical column（250 mm×2.0 mm i.d.,5 μm） and an IonPacAS19 guard column（50 mm×2.0 mm i.d.,5 μm） with an ASRS-ULTRAII 2 mm Suppressor by the gradient potassium hydroxide eluent.Results：The linear range was 0-200.0 mg/L with a correlation coefficient of 0.9991,the limit of quantitation was found to be 0.01 mg/kg.The extraction recoveries were between 82.8%-101.0%,the RSD was less than 5.0%.Conclusion：The method is convenient,rapid and accurate.

关 键 词：离子色谱 面粉制品 溴酸盐 

分 类 号：O657.75[理学—分析化学]