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石墨炉原子吸收光谱法测定不同地区秦艽花中铅和镉的含量
引用本文:张兴旺,陶燕铎,梅丽娟,邵赟.石墨炉原子吸收光谱法测定不同地区秦艽花中铅和镉的含量[J].光谱实验室,2010,27(5):1810-1813.
作者姓名:张兴旺  陶燕铎  梅丽娟  邵赟
作者单位:1. 中国科学院西北高原生物研究所,西宁市西关大街59号,810008;中国科学院研究生院,北京市,100049
2. 中国科学院西北高原生物研究所,西宁市西关大街59号,810008
基金项目:科技部国家科技支撑计划 
摘    要:选用硝酸和高氯酸(4∶1)的混合消解液对样品进行微波消解,利用微波消解-石墨炉原子吸收光谱法测定不同地区秦艽花药材中铅、镉的含量。该方法铅、镉加标回收率分别为96.5%、94.0%,相对标准偏差(RSD)分别为2.7%、4.3%,具有良好的准确度和精密度。结果显示,不同地区的秦艽花中Pb的含量介于1.266—3.429mg·kg-1之间,Cd的含量均小于等于0.167mg·kg-1,不同地区秦艽花中Pb、Cd的含量均有一定差异。该测定结果为秦艽花药材的质量控制与开发利用提供可靠依据。

关 键 词:微波消解  石墨炉原子吸收光谱  秦艽花    

Determination of Pb and Cd in Gentiana Straminea Maxim. in Different Sampling Sites by GFAAS with Microwave Digestion
ZHANG Xing-Wang,TAO Yan-Duo,MEI Lia-Juan,SHAO Yun.Determination of Pb and Cd in Gentiana Straminea Maxim. in Different Sampling Sites by GFAAS with Microwave Digestion[J].Chinese Journal of Spectroscopy Laboratory,2010,27(5):1810-1813.
Authors:ZHANG Xing-Wang  TAO Yan-Duo  MEI Lia-Juan  SHAO Yun
Institution:aa(Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,P.R.China)b(Graduate School of Chinese Academy of Sciences,Beijing 100049,P.R.China)
Abstract:Gentiana straminea Maxim.were digested with HNO3-HClO4(4∶1)by microwave digestion,and the contents of Pb,Cd were detected by graphite furnace atomic absorption spectrometry.The recovery of Pb,Cd were 96.5%,94.0% and RSD were 2.7%,4.3% respectively.The contents of Pb in Gentiana straminea Maxim.from different place are among 1.266—3.429mg·kg-1,and the contents of Cd are no more than 0.167mg·kg-1.The contents of Pb,Cd are considerable difference in Gentiana straminea Maxim.from different place.The data of the experiment could provide an accurate and credible evidence for quality control and exploitation of Gentiana straminea Maxim..
Keywords:Microwave Digestion  GFAAS  Flowers of Gentiana Straminea Maxim    Pb  Cd
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