电感耦合等离子体质谱法测定水产品中的碘和溴  

Determination of Iodine and Bromine in Aquatic Products by Inductively Coupled Plasma Mass Spectrometry

作　　者：王娇娇 黄锦春 袁京群 杏朝刚 毛翎姿 李士敏 WANG Jiaojiao;HUANG Jingchun;YUAN Jingqun;XING Chaogang;MAO Lingzi;LI Shimin(Analysis Center of Agrobiology and Environmental Sciences of Zhejiang University,Hangzhou 310058;Zhejiang Agriculture and Forestry University,Zhoushan,311300;University of California,Berkeley,94720,USA)

机构地区：[1]浙江大学农生环测试中心,浙江杭州310058 [2]浙江农林大学,浙江杭州311300 [3]加州大学伯克利分校,美国伯克利94720

出　　处：《分析科学学报》2023年第1期119-124,共6页Journal of Analytical Science

基　　金：浙江大学实验技术研究项目(No.SJS202017)。

摘　　要：为了建立同时测定紫菜、虾片、鱿鱼干、鲜虾皮等常见水产品中碘和溴含量的方法,通过正交试验设计选择最优提取条件,采用电感耦合等离子体质谱法(ICP-MS)测定元素含量。样品粉碎后加入2%四甲基氢氧化铵,于80℃浸提3 h,然后以103Rh为内标,应用ICP-MS测定127I和79Br含量。结果表明:两种元素在1~1000μg/L范围内线性相关系数均大于0.999,加标回收率在85.7%~112.1%之间,重现性良好,碘和溴的检出限分别为0.0044μg/g和0.029μg/g,定量下限分别为0.015μg/g和0.097μg/g。该方法简单、便捷、准确,可为水产品中碘和溴的同时测定提供参考依据。In order to establish a method for simultaneous determination of iodine(I)and bromine(Br)in aquatic products,such as laver,shrimp slices,dried squid and fresh shrimp skin,inductively coupled plasma mass spectrometry(ICP-MS)was used to measure the above elements.The optimal extraction process was selected through orthogonal experiments.The result showed that the best extraction process was to add 2%tetramethyl ammonium hydroxide,with 3 hours at 80℃.Rhodium(103Rh)was used as the internal standard element in ICP-MS tests for27I and79Br.The results showed that the calibration curves of those two elements were linear in the range of 1μg/L-1000μg/L(r>0.999).The recovery rates of spiked samples ranged from 85.7%to 112.1%with good repeatability and intermediate precision.The limits of detection for I and Br were 0.0044μg/g and 0.029μg/g,respectively.The lower limits of quantitation for iodine and bromine were 0.015μg/g and 0.097μg/g,respectively.The method is simple,convenient and accurate,and provides a reference for the simultaneous determination of iodine and bromine in food.

关 键 词：碘 溴 水产品 提取 电感耦合等离子体质谱法 

分 类 号：O657.63[理学—分析化学]