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Pb3.545ng/ml,Cd0.225ng/ml;测定精密度的RSD分别为Pb1.5%,Cd1.0%;回收率分别为Pb113.57%,Cd94.28%。
The contents of toxic and harmful elements lead （Pb） and cadmium （Cd） were detected by microwave digestion- graphite 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.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第10期182-184,共3页
Food Science
关键词
西洋参
微波消解
石墨炉原子吸收光谱法
铅
镉
American ginseng （Panax quinquefolium L.）
microwave digestion
graphite furnace atomic absorption spectrometry
lead
cadmium
