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

doi:10.7506/spkx1002-6630-200910039

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

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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. 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

Abstract

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

CLC Number:

QIN Gong-wei1, 2，CAO Xiao-yong1, 2，WANG Jing1，LI Jing1. Determination of Lead and Cadmium in American Ginsengs (Panax quinquefolium L.) of Different Years[J]. FOOD SCIENCE, 2009, 30(10): 182-184.

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

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