FAAS和HG-AFS用于玉竹中微量元素溶出特性的研究

目的]研究玉竹中微量元素的溶出特性。方法]以HN03-HClO4为消解体系，应用火焰原子吸收法（FAAS）和氢化物发生一原子荧光法（HG—AFS）测定邵东玉竹中12种微量元素Fe、Cu、Zn、Mn、Ni、Ph、Cd、cr、As、Sb、Se和Hg的含量，同时比较微波提取法、超声提取法和传统煎煮法对玉竹中12种微量元素溶出的情况。结果]试样中各元素含量的相对偏差（RSD）为0．04％～4．37％，加标回收率为90．0％-106．O％。玉竹溶出液中含量较多元素的顺序为：Cu〉Fe〉Zn〉Mn，其余元素的含量均很少。结论]微波萃取法在有效成分的提取中具有快速、高效和安全等特点。FAAS和HG．AFS法快速、准确、灵敏度高，适用于玉竹中微量元素的含量测定。

Study on Trace Elements Dissolution Characteristics of Polygonati offwinalis by FAAS and HG-AFS

Objective ] To study trace elements dissolution characteristics of Polygonati officinalis. Method ] The content of 12 kinds of trace elements （Fe, Cu, Zn, Mn, Ni, Pb, Cd, Cr, As, Sb, Se and Hg） in Polygonati officinalis was determined by Flame Atomic Absorption Spectrometry （FAAS） and Hydride Generation Atomic Fluorescence Spectrometry （HG-AFS） with HNO3-HC104 as digestion system. At the same time the dissolution characteristics of the 12 kinds trace elements in different extraction methods （microwave-assisted extraction, ultra- sonic extraction and conventional decocting extraction） were studied. Result] The relative standard deviations （RSD） for all these elements were between 0.04% and 4.37% , and the recoveries were between 90.0% and 106.0%. The order for the plurality content of trace elements in the dissolution of Polygonati officinalis was Cu 〉 Fe 〉 Zn 〉 Mn, and the content of other trace elements was little. Conclusion ] The method of microwave-assisted extraction for effective constituent was rapid, effective and safe. FAAS and HG-AFS were rapid, sensitive and accurate. It was suitable for the determination of the content of trace elements in Polygonati officinalis.