食品科学

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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

周伟明,陈柳生,王如意   

  1. 广东食品药品职业学院,广东 广州 510520
  • 出版日期:2015-12-25 发布日期:2015-12-24
  • 通讯作者: 王如意
  • 基金资助:

    广东省中医药局科研基金资助项目(20141199)

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

ZHOU Weiming, CHEN Liusheng, WANG Ruyi   

  1. Guangdong Food and Drug Vocational College, Guangzhou 510520, China
  • Online:2015-12-25 Published:2015-12-24
  • Contact: WANG Ruyi

摘要:

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。

关键词: 凉粉草, 微波消解, 电感耦合等离子体原子发射光谱, 重金属, 无机元素

Abstract:

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.

Key words: Mesona chinensis Benth, microwave digestion, inductively coupled plasma optical emission spectroscopy、 (ICP-OES), heavy metal, inorganic elements

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