凤冈锌硒茶中微量元素锌、硒的含量测定

Determination of Trace Elements Zinc and Selenium in Fenggang Zinc Selenium Tea

摘要: 目的：测定凤冈锌硒茶原材料、半成品和成品中微量元素锌、硒元素的含量，并对其进行差异性分析，以期对凤冈锌硒茶进行质量控制。方法：采用湿法消解和微波消解对18批不同加工阶段凤冈锌硒茶样品进行前处理，电感耦合等离子体质谱(ICP-MS)法对凤冈锌硒茶加工过程中锌、硒元素含量进行测定，并对其含量进行系统差异性分析及系统聚类分析。结果：凤冈锌硒茶各加工阶段茶叶锌、硒元素的含量测定结果均在标准范围内，且各加工阶段茶叶锌、硒元素的含量无显著差异(P > 0.05)，与系统聚类分析结果一致。结论：研究表明，凤冈锌硒茶中锌、硒元素含量在各加工过程中无明显差异，表明其受加工工艺的影响较小。

Abstract: Objective: To determine the contents of trace elements zinc and selenium in raw materials, semi-finished products and finished products of Fenggang zinc and selenium tea, and to analyze their differences, in order to control the quality of Fenggang zinc and selenium tea. Methods: Eighteen batches of Fenggang zinc-selenium tea samples in different processing stages were pretreated by wet digestion and microwave digestion. The contents of zinc and selenium in Fenggang zinc-selenium tea samples during processing were determined by inductively coupled plasma mass spectrometry (ICP-MS), and their contents were analyzed by systematic difference analysis and systematic cluster analysis. Results: The contents of zinc and selenium in Fenggang Zinc and Selenium tea at different processing stages were all within the standard range, and there was no significant difference in the contents of zinc and selenium in Fenggang zinc and selenium tea at different processing stages (P > 0.05), which was consistent with the results of systematic cluster analysis. Conclusion: The study showed that the contents of zinc and selenium in Fenggang Zn-selenium tea had no significant difference in each processing process, indicating that the processing technology had little influence on the tea.