范文编号:SP121 范文字数:3154,页数:20 摘要:综述了电感耦合等离子发射光谱在茶叶稀土元素分析中的应用,研究了电感耦合等离子发射光谱法(ICP-AES)测定茶叶中痕量稀土元素(REEs)的方法。详细讨论了测定稀土元素的测试条件优化。根据植物标准参考物质(GBW07603,GBW08513)的分析结果评价方法的正确性。在微波条件下,HF/HNO3能快速而有效地分解茶叶样品,利用钪作为内标来校正茶叶检测过程中的干扰。在分析中决定主要元素、次要元素和微量元素的分析测定。直接稀释后用ICP-AES测定其中的稀土元素。实验结果表明,该方法简便,准确, 适用于含稀土元素种类和含量不同的茶叶样品。本文结合成熟的微波消解技术与轴向观测ICP-AES检验方法,具有一定的创新和实用价值。 Abstract:Application of ICP-AES in the analysis of rare earth elements in tea leaves, ICP-AES spectrometry has been employed to determine the concentrations of rare earth elements (REES) in tea leaves. For prompt sample decomposition, a microwave digestion was successfully used with a mixture of HF/HNO3. The potential of the method was evaluated by analysis of REEs in standard reference materials (GBW07603,GBW08513). Viscosity effects of the tea leaves solutions are corrected using scandium as an internal standard. Major, minor and trace elements were determined in a single analysis.The results agree well with the certified values. The experimental results show that the proposed method is simple, precise and accurate, and that the concentrations and distribution of REEs in plants vary with plant types.This essay integrate ICP-AES and the axially-Viewed Simultaneous ICP-AES together, it have some innovation and practical value.
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