基体匹配-电感耦合等离子体质谱法测定白酒中26种元素含量

Determination of 26 kinds of elements content in liquor by matrix matching-inductively coupled plasma mass spectrometry

中文关键词:  基体匹配  白酒  多元素  电感耦合等离子体质谱法

英文关键词:matrix matching  liquor  multielement  inductively coupled plasma mass spectrometry

中文摘要:

      目的 利用基体匹配, 建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)快速测定白酒中26种元素的方法。方法 结合动能歧视(kinetic energy discrimination, KED)模式, 采用内标法测定白酒中Cd、Sn、Ba、Pb、Li、B、Mg、Al、K、Ca、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Rb、Sr、Mo、Sb、Na、Se和Hg等26种元素含量, 并且与标准检验方法进行比较。结果 该方法相关系数为0.9990~0.9999, 检出限为0.1~300.0 μg/L, 加标回收率为94.5%~104.4%, 相对标准偏差(relative standard deviations, RSDs)为0.1%~1.2%。加标回收率明显优于未进行基体匹配测定方法, 方法性能参数均符合GB 5009.295—2023《食品安全国家标准 化学分析方法验证通则》要求。与标准检验方法比较, 能有效减少前处理步骤、缩短前处理时间、节约耗材, 二者测定结果无显著差异。结论 该方法简便易行、快捷准确、稳定可靠, 适用于批量白酒中多元素检测, 为保障白酒质量安全提供技术支持。

英文摘要:

      Objective To establish a method for rapid determination of 26 kinds of elements in liquor by inductively coupled plasma mass spectrometry (ICP-MS) adopting matrix matching. Methods Combining with kinetic energy discrimination (KED) and internal standard correction mode, the determination method of Cd, Sn, Ba, Pb, Li, B, Mg, Al, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Rb, Sr, Mo, Sb, Na, Se and Hg in liquor had been established though direct dilution injection, and compared with the standard test method. Results The results showed that the correlation coefficient of standard curve was 0.9990–0.9999, the limit of determination was 0.1–300.0 μg/L, the standard recovery rates were 94.5%–104.4%, the relative standard deviations (RSDs) were 0.1%–1.2%. The standard recovery rate was obviously better than that without matrix matching method. The performance parameters of the method met the requirements of GB 5009.295—2023 National food safety standards-General rules for verification of chemical analysis methods. Compared with the standard test method, it could effectively reduce the pre-treatment steps, shorten the pre-treatment time, and save consumables. The results of the 2 kinds of methods showed no significant difference. Conclusion The method is simple, fast, accurate, stable and reliable, and is suitable for the bulk detection of multielement in liquor. The method provides technical support for ensuring liquor quality and safety.