微波消解-高分辨连续光源原子吸收光谱法测定锁阳和韭菜籽中的重金属元素含量  

Determination of Heavy Metal Elements in Cynomorium and Leek Seeds by High Resolution Continuum Source Atomic Absorption Spectrometry with Microwave Digestion

作　　者：胡玥[1] 丁玉竹 高旭东[1] 李西波[2] 邵士俊[1] 

机构地区：[1]中国科学院兰州化学物理研究所,甘肃兰州730000 [2]西北师范大学生命科学学院,甘肃兰州730070

出　　处：《分析测试技术与仪器》2016年第2期90-95,共6页Analysis and Testing Technology and Instruments

基　　金：中国科学院仪器设备功能开发技术创新项目(Y40474KJY1);西北师范大学青年教师科研能力提升计划骨干项目(NWNU-LKQN-13-9)

摘　　要：利用微波消解-高分辨连续光源原子吸收光谱法测定锁阳、韭菜籽两种中药材中铜(Cu)、铅(Pb)、镉(Cd)、铬(Cr)、砷(As)和汞(Hg)的含量.采用微波消解进行样品前处理,火焰原子吸收法测定其中的Cu含量,石墨炉原子吸收法测定Pb、Cd和Cr含量,氢化物发生原子吸收法测定As、Hg含量.方法线性关系良好,相关系数R^2大于0.999,加标回收率为95.61%~100.1%,RSD为0.8%~3.3%,测得锁阳和韭菜籽中Cu、Pb、Cd、Cr、As和Hg的含量值均低于《药用植物及制剂进口绿色行业标准》和食品安全国家标准《食品中污染物限量》(GB2762-2012)中规定的限量指标.方法分析速率快、干扰少、精密度高,适用于中药材中重金属含量的测定.The contents of heavy metals（ Cu,Pb,Cd,Cr,As,Hg） in Chinese herbal medicines（ cynomorium and leek seeds） were tested using microwave digestion-high resolution continuum source atomic absorption spectrometry（ HR- CS AAS）. The samples were digested by microwave digestion,and methods were developed for the determination of the contents of Cu by flame atomic absorption spectrometry,Pb,Cd and Cr by graphite furnace atomic absorption spectrometry,As and Hg by hydride generation atomic absorption spectrometry,respectively. The recoveries were 95. 61% ~ 100. 1%,the relative standard deviations（ RSDs） were 0. 8% ~ 3. 3%,and the correlation coefficients of R^2 were 0. 999. The results showed that the contents of the above-mentioned heavy metal elements in cynomorium and leek seeds were all lower than the permitted values in the standard of ＂medicinal plants and preparation of green import industry standard ＂andNational food safety standard＂limited quantity of pollutants in food＂. The established method are simple,rapid,accurate and reliable,and are successfully applied to analyze the contents of heavy metal elements in Chinese herbal medicines.

关 键 词：高分辨连续光源原子吸收光谱法 微波消解 重金属元素 定量检测 

分 类 号：O657.32[理学—分析化学]