Occurrence of fumonisin B1 and hydrolyzed fumonisin B1 in Mexican nixtamalized cornmeal.

摘要

A total of 80 nixtamalized maize meal samples of 1 kg were collected during May and July 2002 from supermarkets, retail outlets and groceries in 4 geographical sections of Hermosillo, Sonora, Mexico. All samples were manufactured during 2002. Additionally, 71 samples were collected from all retail outlets in the city from May to July 2003. Levels of total fumonisins were screened using Fumonitest immunoaffinity column method, and HPLC was used to confirm fumonisin B1 (FB1) and hydrolysed FB1 (HFB1) levels on positive samples. In general, all FB1 and HFB1 levels detected were higher than those recommended by the FDA, suggesting that fumonisin contamination may pose a risk for human consumption.