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
FOOD SCIENCE . 2009, (10): 182 -184 .  DOI: 10.7506/spkx1002-6630-200910039