电感耦合等离子体原子发射光谱法测定凉粉草不同部位中22 种无机元素的含量

为测定凉粉草根、枝和叶中无机元素的含量，采用HNO3-H2O2消解体系，通过微波消解彻底有效地消解样品中的有机物，应用电感耦合等离子体原子发射光谱法测定Al、As、Ag、Ba、Bi、Ca等22 种无机元素含量。结果表明，在优化条件下，待测各元素间相互干扰较小，22 种元素在一定范围具有良好的线性关系，相关系数（r）均不小于0.999 6，检出限范围为0.000 1～0.019 0 μg/mL，平均回收率为98.9%～103.4%，相对标准偏差为0.7%～5.2%（n=6）。实验方法快速、简便、准确、灵敏度高，能够准确测定凉粉草不同部位中22 种无机元素含量。

Determination of 22 Inorganic Elements in Different Parts of Mesona chinensis Benth by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)

This paper proposes a method to determine the contents of 22 inorganic elements in different parts of Mesona
chinensis Benth by inductively coupled plasma optical emission spectroscopy (ICP-OES). HNO3-H2O2 digestion system
was used to completely decompose the organic compounds by microwave digestion. The calibration curves showed a good
linear relationship for all investigated analytes (r ≥ 0.999 6) with limits of detection of 0.000 1–0.019 0 μg/mL. The average
recovery rates were 98.9%–103.4%, with a relative standard deviation (RSD) of 0.7%–5.2% (n = 6). The method is quick,
easy, accurate and highly sensitive and can be used to accurately determine the contents of 22 inorganic elements in different
parts of Mesona chinensis Benth.