Stability of fumonisins in thermally processed corn products.
Little is known about the stability of fumonisins in corn-based foods during heating. This study investigated the effects of canning, baking, and roasting (dry heating) processes on the stability of fumonisins in artificially contaminated and naturally contaminated corn-based foods. All samples were analyzed for fumonisin levels by both a commercial enzyme-linked immunosorbent assay (ELISA) and a high-performance liquid chromatographic (HPLC) method. Canned whole-kernel corn showed a significant (P < or = 0.05) decrease in fumonisins by both ELISA (15%) and HPLC (11%) analyses. Canned cream-style corn and baked corn bread showed significant (P < or = 0.05) decreases in fumonisin levels at an average rate of 9% and 48%, respectively, as analyzed by ELISA. Corn-muffin mix artificially contaminated with 5 micrograms of fumonisin B1 (FB1) per g and naturally contaminated corn-muffin mix showed no significant (P < or = 0.05) losses of fumonisins upon baking. Roasting cornmeal samples artificially contaminated with 5 micrograms of FB1 per g and naturally contaminated cornmeal samples at 218 degrees C for 15 min resulted in almost complete loss of fumonisins.
Castelo
M M
MM
Department of Food Science and Technology, University of Nebraska-Lincoln 68583-0919, USA.
Sumner
S S
SS
Bullerman
L B
LB
D002264:Carboxylic Acids / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D004797:Enzyme-Linked Immunosorbent Assay; D037341:Fumonisins; D006358:Hot Temperature; D009183:Mycotoxins / Q000737:chemistry*; D003313:Zea mays / Q000382:microbiology*
D002264:Carboxylic Acids; D037341:Fumonisins; D009183:Mycotoxins; C056933:fumonisin B1