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.
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.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2015年第24期168-171,共4页
Food Science
基金
广东省中医药局科研基金资助项目(20141199)
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
Mesona chinensis Benth
microwave digestion
inductively coupled plasma optical emission spectroscopy（ICP-OES）
heavy metal
inorganic elements
