周瑞妮,张旭红,张电光,陈锡炎,吴 绒,邓春丽,梁旭霞.电感耦合等离子体质谱法测定肉、蛋、奶及膳食中碘含量及两种前处理方法的比较[J].食品安全质量检测学报,2022,13(5):1567-1574 |
电感耦合等离子体质谱法测定肉、蛋、奶及膳食中碘含量及两种前处理方法的比较 |
Determination of iodine content in meat, eggs, milk and diet by inductively coupled plasma mass spectrometry and comparison of 2 kinds of pretreatment methods |
投稿时间:2021-11-29 修订日期:2022-02-26 |
DOI: |
中文关键词: 电感耦合等离子体质谱法 碘 肉 蛋 奶 膳食 |
英文关键词:inductively coupled plasma mass spectrometry iodine meat eggs milk diet |
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中文摘要: |
目的 补充GB 5009.267—2020《食品安全国家标准 食品中碘的测定》电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)测定肉、蛋、奶及膳食中碘含量的方法学数据, 同时进行两种前处理方法的比较。方法 样品分别用四甲基氢氧化铵(tetramethylammonium hydroxide, TMAH)溶液和TMAH-过氧化氢(hydrogen peroxide, H2O2)溶液进行不同前处理, 用ICP-MS测定碘含量。以有证标准物质、加标回收率、精密度及稳定性为指标, 对两种前处理方法进行评价。结果 TMAH法和TMAH-H2O2法的检出限、线性相关系数、加标回收率、5种有证标准物质测定结果、精密度及稳定性均满足方法要求。结论 TMAH法易于操作, 更为省时高效, 适用于大批量食品样品中碘含量的测试。 |
英文摘要: |
Objective To supplement the methodological data of the determination of iodine content in meat, eggs, milk and diet by GB 5009.267—2020 National food safety standard-Determination of iodine in food inductively coupled plasma mass spectrometry (ICP-MS), and compare the 2 kinds of pretreatment methods. Methods The samples were pretreated with tetramethylammonium hydroxide (TMAH) solution and TMAH-hydrogen peroxide (H2O2) solution, respectively, the iodine content was determined by ICP-MS. The certified reference materials, recovery after standard addition, precision and stability were used as indicators to evaluate the 2 kinds of pretreatment methods. Results The detection limits, linear correlation coefficients, spiked recoveries, and the results of 5 kinds of certified reference substances by TMAH method and TMAH-H2O2 method showed that their precision and stability met the requirements of the method. Conclusion The TMAH method is easy to operate, more time-saving and efficient, and is suitable for the determination of iodine content in large quantities of food samples. |
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