沸水阻断多聚磷酸盐分解离子色谱法检测水产品中的多聚磷酸盐  

Determination of Polyphosphates in Aquatic Products by Ion Chromatography after Inhibition by Boiling Water

作　　者：陈笑梅 池浩超 黄超群 朱岩[3] 朱晓雨 王雪[3] 

机构地区：[1]浙江出入境检验检疫局,杭州310012 [2]浙江立德产品技术有限公司,杭州310012 [3]浙江大学西溪校区化学系,杭州310027

出　　处：《分析化学》2008年第10期1403-1406,共4页Chinese Journal of Analytical Chemistry

基　　金：浙江省国境安全检验检疫科技创新服务平台(No.2006C17014)项目

摘　　要：多聚磷酸盐在水产品中的快速分解影响其准确测定。用沸水破坏使多聚磷酸盐分解的物质,并用三氯甲烷去除水产品中蛋白质等杂质,离子色谱准确测定多聚磷酸盐各组分的量。实验中采用淋洗液自动发生器产生的KOH溶液作为流动相,保护柱和分离柱采用Ionpac AG11-HC和Ionpac AS11-HC抑制电导检测,可以较好地分离所检测焦磷酸根和三偏磷酸根。该方法操作简单,检出限为10mg/kg,当水产品中添加多聚磷酸盐标准物质浓度达到10～1000mg/kg范围时,回收率在70%～110%之间,相对标准偏差小于12%。Due to the rapid decomposition of polyphosphates in aquatic products, it is hard to detect the amount of polyphosphates in aquatic products. In this method, boiling water was used to destroy the substances that induce the decomposition of polyphosphates. In order to remove the impurity, trichloromethane was used as the precipitator. The KOH solution was used as eluent, Ionpac AG11-HC guard column, Ionpac AS11-HC separator column and suppressed conductivity detector were used for the analysis of pyrophosphate, tripolyphosphate and trimetaphosphate. This method is simple and the detection limit is 10.0 mg/kg. The recoveries are 70% - 110% for the spiked sample at the concentration level between 10 - 1000 mg/kg with the RSD less than 12%.

关 键 词：多聚磷酸盐 离子色谱 三氯甲烷 水产品 

分 类 号：TS254.7[轻工技术与工程—水产品加工及贮藏工程]