湖北农业科学 ›› 2023, Vol. 62 ›› Issue (9): 130-134.doi: 10.14088/j.cnki.issn0439-8114.2023.09.024

• 检测分析 • 上一篇    下一篇

石墨消解-电感耦合等离子体质谱法测定挂面中八种无机元素

杨伟1, 李蓉1, 毛永杨1, 杨子秋1, 李涛1, 段宝忠2   

  1. 1.大理州食品检验检测院,云南 大理 671000;
    2.大理大学药学院,云南 大理 671000
  • 收稿日期:2022-09-13 出版日期:2023-09-25 发布日期:2023-10-24
  • 通讯作者: 段宝忠(1983-),男,教授,博士,主要从事中药资源与种质创新研究,(电子信箱)bzduan@126.com。
  • 作者简介:杨 伟(1987-),男,云南大理人,工程师,硕士,主要从事食品安全分析与检测研究,(电话)13629610065(电子信箱)1621776759@qq.com。
  • 基金资助:
    云南省兴滇英才支持计划项目(YNWR-QNBJ-2020251)

Determination of 8 inorganic elements in dried noodles by graphite digestion inductively coupled plasma mass spectrometry

YANG Wei1, LI Rong1, MAO Yong-yang1, YANG Zi-qiu1, LI Tao1, DUAN Bao-zhong2   

  1. 1. Dali State Food Inspection and Testing Institute, Dali 671000, Yunnan, China;
    2. School of Pharmacy, Dali University, Dali 671000, Yunnan, China
  • Received:2022-09-13 Online:2023-09-25 Published:2023-10-24

摘要: 建立了测定挂面中8种无机元素的石墨消解-电感耦合等离子体质谱法。挂面样品经石墨消解后,采用ICP-MS法测定其中的Na、Mg、K、Mn、Cu、Zn、Sr、Ba 8种无机元素含量,并对测定条件进行优化。在选定的工作条件下,各无机元素在标准曲线范围内呈良好的线性关系,相关系数≥0.999 5,检出限为0.006 5~1.970 0 mg/kg,精密度的相对标准偏差为0.7%~3.1%,重复性的相对标准偏差为0.9%~4.7%,平均加标回收率为88.2%~106.3%,相对标准偏差为1.1%~5.3%。采用该方法对小麦标准物质GBW10011a进行测定,测定结果与标准参考值相符。实际样品对比分析结果显示,石墨消解-电感耦合等离子体质谱法与GB 5009.268—2016《食品安全国家标准 食品中多元素的测定》(第一法)的微波消解法测定结果无显著差异(P>0.05)。挂面中8种无机元素的含量从高到低依次为Na、K、Mg、Zn、Mn、Cu、Sr、Ba。石墨消解-电感耦合等离子体质谱法操作简单、稳定性好、结果可靠,可为挂面中8种无机元素的含量测定提供参考。

关键词: 石墨消解, 电感耦合等离子体质谱(ICP-MS), 挂面, 无机元素

Abstract: A graphite digestion inductively coupled plasma mass spectrometry method was established for the determination of 8 inorganic elements in dried noodles.After graphite digestion, the content of eight inorganic elements Na, Mg, K, Mn, Cu, Zn, Sr, and Ba in the dried noodles was determined by ICP-MS, and the determination conditions were optimized. Under the selected working conditions, each inorganic element exhibited a good linear relationship within the standard curve range, with a correlation coefficient of ≥ 0.999 5, a detection limit of 0.006 5~1.970 0 mg/kg, a relative standard deviation of precision of 0.7%~3.1%, a relative standard deviation of repeatability of 0.9%~4.7%, an average recovery rate of 88.2%~106.3%, and a relative standard deviation of 1.1%~5.3%. The method was used to determine the wheat standard substance GBW10011a, and the results were consistent with the standard reference value. The comparative analysis results of actual samples showed that there was no significant difference (P>0.05) between the graphite digestion inductively coupled plasma mass spectrometry method and the microwave digestion method of GB 5009.268-2016 “national food safety standard for the determination of multiple elements in food” (method 1). The content of 8 inorganic elements in dried noodles ranged from high to low, including Na, K, Mg, Zn, Mn, Cu, Sr, and Ba. The graphite digestion inductively coupled plasma mass spectrometry method was easy to operate, had good stability, and reliable results, providing a reference for the determination of 8 inorganic elements in dried noodles.

Key words: graphite digestion, inductively coupled plasma mass spectrometry (ICP-MS), the dried noodles, inorganic elements

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