丁玉龙, 葛宇, 徐红斌, 段文峰, 于学雷, 田芳, 宋畅. 微波消解-电感耦合等离子体质谱法测定乳制品中总碘[J]. 分析测试技术与仪器, 2016, 22(3): 184-188. DOI: 10.16495/j.1006-3757.2016.03.010
引用本文: 丁玉龙, 葛宇, 徐红斌, 段文峰, 于学雷, 田芳, 宋畅. 微波消解-电感耦合等离子体质谱法测定乳制品中总碘[J]. 分析测试技术与仪器, 2016, 22(3): 184-188. DOI: 10.16495/j.1006-3757.2016.03.010
DING Yu-long, GE Yu, XU Hong-bin, DUAN Wen-feng, YU Xue-lei, TIAN Fang, Song Chang. Determination of Total Iodine in Dairy Products by Inductively Coupled Plasma/Mass Spectrometry with Microwave Digestion[J]. Analysis and Testing Technology and Instruments, 2016, 22(3): 184-188. DOI: 10.16495/j.1006-3757.2016.03.010
Citation: DING Yu-long, GE Yu, XU Hong-bin, DUAN Wen-feng, YU Xue-lei, TIAN Fang, Song Chang. Determination of Total Iodine in Dairy Products by Inductively Coupled Plasma/Mass Spectrometry with Microwave Digestion[J]. Analysis and Testing Technology and Instruments, 2016, 22(3): 184-188. DOI: 10.16495/j.1006-3757.2016.03.010

微波消解-电感耦合等离子体质谱法测定乳制品中总碘

Determination of Total Iodine in Dairy Products by Inductively Coupled Plasma/Mass Spectrometry with Microwave Digestion

  • 摘要: 建立了乳制品中碘含量的微波消解-电感耦合等离子体质谱测试方法.方法以硝酸为消解介质,镨做内标.方法的检出限为0.02 μg/kg,线性范围为0~100 μg/L,相关系数r优于0.999 5.相对标准偏差RSD(%)均在5.0%以下,加标回收率在94.1%~97.7%之间,GBW10017奶粉标准物质的测定结果与标示值一致.试验结果表明所建立的方法灵敏度高、简便、快速、准确,适用于乳制品中碘含量的测定.

     

    Abstract: A method for the determination of total iodine by microwave digested-inductively coupled plasma mass spectrometry (ICP-MS) in infant formula using nitric acid as the digestion medium and Pr as the internal standard is developed. The detection limit of the method was 0.02 μg/kg, while the linear range was 0~100 μg/L and the linear coefficient was better than 0.999 5. The precision of the method (RSD %) was less than 5.0%. Precision and accuracy are evaluated by the analysis of certified reference materials GBW10017 milk powder. The determined iodine contents were in good agreement with the certified values. The spiked recoveries of real samples were from 94.1% to 97.7%. The experiments show that this method is sensitive, simple, rapid, and accurate for the determination of iodine contents in dairy products.

     

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