姜 杰,张慧敏,林 凯,王 超,阮莎莎,李瑞园,陈裕华,刘桂华.碱提取-电感耦合等离子体质谱法测定食品中的碘[J].食品安全质量检测学报,2021,12(6):2235-2239
碱提取-电感耦合等离子体质谱法测定食品中的碘
Determination of iodine content in food by inductively coupled plasma-mass spectrometry with alkali extraction
投稿时间:2020-12-15  修订日期:2021-01-19
DOI:
中文关键词:    电感耦合等离子体质谱  食品
英文关键词:iodine  inductively coupled plasma-mass spectrometry  food
基金项目:深圳市三名工程项目(SZSM201811070)、食品安全国家标准制定(spaq-2016-172)、深圳市医学重点学科(SZXK066)
作者单位
姜 杰 深圳市疾病预防控制中心 
张慧敏 深圳市疾病预防控制中心 
林 凯 深圳市疾病预防控制中心 
王 超 深圳市疾病预防控制中心 
阮莎莎 深圳市疾病预防控制中心 
李瑞园 深圳市疾病预防控制中心 
陈裕华 深圳市疾病预防控制中心 
刘桂华 深圳市疾病预防控制中心 
AuthorInstitution
JIANG Jie Shenzhen Center for Disease Control and Prevention 
ZHANG Hui-Min Shenzhen Center for Disease Control and Prevention 
LIN Kai Shenzhen Center for Disease Control and Prevention 
WANG Chao Shenzhen Center for Disease Control and Prevention 
RUAN Sha-Sha Shenzhen Center for Disease Control and Prevention 
LI Rui-Yuan Shenzhen Center for Disease Control and Prevention 
CHEN Yu-Hua Shenzhen Center for Disease Control and Prevention 
LIU Gui-Hua Shenzhen Center for Disease Control and Prevention 
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中文摘要:
      目的 建立碱提取-电感耦合等离子体质谱法测定食品中碘含量。方法 样品经5%四甲基氢氧化铵(tetramethylammonium hydroxide, TMAH)溶液于85 ℃±5 ℃提取3 h, 离心后取上清液, 以铼作为内标, 采用电感耦合等离子体质谱法(inductively coupled plasma-mass spectrometry, ICP-MS)测定。结果 在0.5~50 μg/L的线性范围内, 回归方程呈现良好的线性关系, r=0.9998。该方法检出限为0.003 mg/kg, 定量限为0.01 mg/kg, 回收率为94%~102%之间, 相对标准偏差小于10%。结论 该方法操作简单, 灵敏度高, 适用于食品中碘含量的测定。
英文摘要:
      Objective To establish a method for determination of iodine content in food by inductively coupled plasma-mass spectrometry with alkali extraction. Methods Samples were extracted by 5% tetramethylammonium hydroxide (TMAH) at 85 ℃±5 ℃ for 3 h. The supernatants after centrifugal were determined by inductively coupled plasma-mass spectrometry (ICP-MS) with Re as internal standard. Results The calibration curve showed good linear relationship in the range 0.5-50 μg/L with good correlation coefficients (r=0.9998). The limit of detection was 0.003 mg/kg and the limit of quantification was 0.01 mg/kg. The spiked recoveries were 94%?102%, the relative standard deviation was less than 10%. Conclusion This method is simple and sensitive, it is suitable for the determination of iodine in food.
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