Natural occurrence of fumonisin B_1 and B_2 in corns imported from U.S.A.

摘要

Eighty corn samples, which imported from U.S.A between 1995 and 1996, were analyzed for fumonisin B_1 (FB_l) and B_2 (FB_2) contamination. The total fumonisin level and mean from 80 imported samples showed 0 (limited detection level)-65.9 #mu#g/g mgand 6.9 #mu#g/g, respectively. FB_1 was detected in 57 (71.3%) from 80 samples at the concentrations ranging from 0 to 48.8 #mu#g/g, while FB_2 was detected in 49(61.3%) at concentrations ranging from 0 to 17.1 #mu#g/g. The total fumonisin incidence analyzed from 80 samples were 37.5%, 42.6 and 19.9% for concentrations ranging from below 1 #mu#g/g, between 1.1 and 10#mu#g/g and above 30 #mu#g/g, respectively. The total fumonisin level containing below 1 #mu#g/g from samples imported in 1995 and 1996 was 47.7% (21/ 44) #alpha#nd 29.4 (10/34), while total fumonisin level containing above 10 #mu#g/g was 47.7% (21144) and 29.4 (10/ 34), respectively. In the meanwhile, the fumonisin B_1 and B_2 containing below 1 #mu#g/g from 80 samples imported between 1995 and 1996 was 38.8% and 67.5%, while fumonisin B_1 and B_2 containing above 10#mu#/g was 12.5% and 5%, respectively.