电感耦合等离子体原子发射光谱法同时测定鼠曲草中九种微量元素

Detemination of nine microelements in Gnaphlium affine with Inductively Coupled Plasma Atomic Emission Spectroscopy

摘要: 选择硝酸-过氧化氢作消解液,采用湿法消解法对鼠曲草（全草）进行消化处理,探究了消解液用量、消解时间、酸度影响和离子干扰等条件。用ICP-AES法测定其中铜、锌、铅、铁、镉、镍、铬、砷、锰9种元素。该法加标回收率为95.0%～110.0%,检出限为0.427～2.28μg/L,RSD<6%。利用该方法分析了茶树叶标准物质（GBW08513）的9种金属元素,测定结果与标准值一致。实验结果表明该法耗样少,准确度高,快速,测定结果令人满意。

Abstract: The nine microelements including Cu, Zn, Pb, Fe, Cd, Ni, Cr, As and Mn in Gnaphlium affine were analyzed by ICP-AES after Gnaphlium affine was digested with nitric acid-hydrogen peroxide using damp digestion method. It was explored digestion consumption, digestion time, acidity and ion interference conditions. The recovery rate was from 95.0% to 110.0%, and the linear range was from 0.427μg/L to 2.28μg/L, and RSD was below 6%. The determination results of nine elements in tea leaf standard (GBW08513) were in agreement with the standard. This method is low sample consumption, accurate and rapid, and the result is satisfactory.