离子色谱法测定水产品中的多聚磷酸盐  

Determination of Polyphosphates in Aquatic Product by Ion Chromotography

作　　者：李竹英 朱艳俊 汪琼[2] 叶明立[2] 

机构地区：[1]义乌市产品质量监督检验所,义乌322000 [2]浙江大学化学系,杭州310028

出　　处：《现代科学仪器》2009年第4期104-106,共3页Modern Scientific Instruments

摘　　要：本文建立了一种采用离子色谱法,抑制型电导检测水产品中多聚磷酸盐的方法。选择的色谱条件为IonPac AS11-HC离子交换柱,KOH梯度淋洗,抑制型电导检测对其进行测定。水产品样品经过用沸水灭活酶、蛋白质沉淀、离心、分液等一系列的样品前处理后进样分析,消除了基体干扰。该方法线性相关系数r大于0.999,实际样品RSD小于3%,具有灵敏度高,选择性好,操作简单,价格便宜,对环境友好等特点。A method was developed for the extraction and detection of the polyphosphates in freezing seafood. Chloroform was used to deposit the protein in freezing seafood. The polyphosphates （PO4^3-, （PO3）nn-, P2O7^4-, P3O10^5-） was determined by ion chromatography with separation by gradient elution of KOH on an Ion Pac AS11 column, and was detected by suppressed conductivity detector. The method can exclude the interference of protein effectively, and its recovery is satisfactory. The method is sensitive, selective and effective, and can be easily performed.

关 键 词：离子色谱 水产品 多聚磷酸盐 

分 类 号：O657.75[理学—分析化学] TS254.7[理学—化学]