食品科学 ›› 2009, Vol. 30 ›› Issue (10): 182-184.doi: 10.7506/spkx1002-6630-200910039

• 分析检测 • 上一篇    下一篇

不同年生西洋参中铅、镉含量分析

秦公伟1,2,曹小勇1,2,王 晶1,李 静1   

  1. 1.陕西理工学院生物科学与工程学院 2.陕西省资源生物重点实验室
  • 收稿日期:2008-07-10 修回日期:2009-01-08 出版日期:2009-05-15 发布日期:2010-12-29
  • 通讯作者: 秦公伟 E-mail:qgwei2008@yahoo.com.cn

Determination of Lead and Cadmium in American Ginsengs (Panax quinquefolium L.) of Different Years

QIN Gong-wei1, 2,CAO Xiao-yong1, 2,WANG Jing1,LI Jing1   

  1. (1. School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China;
    2. Bioresources Key Laboratory of Shaanxi Province, Hanzhong 723000, China)
  • Received:2008-07-10 Revised:2009-01-08 Online:2009-05-15 Published:2010-12-29
  • Contact: QIN Gong-wei1, 2, E-mail:qgwei2008@yahoo.com.cn

摘要:

采用微波消解- 石墨炉原子吸收法对不同年生、不同地块西洋参中的毒害元素铅(Pb)、镉(Cd)进行检测分析。结果表明,同一地块西洋参随着生长年份的增加,Cd、Pb 元素的含量有所提高,呈现随年份增加在根内积累的规律;不同地块,相同生长年份西洋参Cd、Pb 元素含量存在差异。方法检出限分别为Pb 3.545ng/ml,Cd0.225ng/ml;测定精密度的RSD 分别为Pb 1.5%,Cd 1.0%;回收率分别为Pb 113.57%,Cd 94.28%。

关键词: 西洋参, 微波消解, 石墨炉原子吸收光谱法, 铅,

Abstract:

The contents of toxic and harmful elements lead (Pb) and cadmium (Cd) were detected by microwave digestiongraphite furnace atomic absorption spectrometry (GFAAS) in American ginsengs of different years or from different plots. The results showed that the contents of cadmium and lead in American ginseng increased year by year in the same plot, while the contents in American ginseng of the same age had a certain difference among different plots. The limits of detection of Pb and Cd were 3.545 ng/ml and 0.225 ng/ml, respectively. The relative standard deviations of precision for Pb and Cd were 1.5% and 1.0%, respectively. The spike recoveries of Pb and Cd were 113.57% and 94.28%, respectively.

Key words: American ginseng (Panax quinquefolium L.), microwave digestion, graphite furnace atomic absorption spectrometry, lead, cadmium

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