FI-ICP-AES标准加入法直接测定中药漏芦中的微量元素

Flow Injection Standard Addition Method to ICP-AES for the Direct Determination of Trace Elements in Chinese Medicine Loulu Sample

采用流动注射-等离子体原子发射光谱(FI—ICP—AES)反相标准加入法(也称内插法)对中药漏芦中多种微量元素进行同时测定。对FI和ICP—AES的工作条件进行了试验,提出了优化条件下的测定方法。该法用于中药漏芦中的多种微量元素Fe、Cu、Mn、Cr和Ni的同时测定,分析结果满意,方法具有操作简单,消除基体效应,消耗试样少,精密度和准确度好以及分析效率较高等优点,为中草药中多种微量元素同时测定提供了一个快捷、实用的新方法。

Flow injection standard addition methods applied to inductively coupled plasma atomic emission spec-trometry are studied and used for simultaneous determination of trace elements in Chinese Medicine Loulu (Rhaponticum uniflorum L. ) sample. The most proper operating conditions have been tested. The detection limits for the determination of Fe,Mn,Cu,Cr and Ni are 0. 25,0. 015,0. 29,0. 05 and 1. 03 g/mL, respectively; the relative standard deviations are less than 2. 15% (n=8); the recovery are in the range of 86. 0%-110. 0%. The method has been applied to the analysis of real sample Loulu with satisfactory results.