Analytical methodology. Fumonisin B1 was determined
by high performance liquid chromatography (HPLC) using
a modification of a previously described procedure.22 A 50-g
sample of ground culture material or ration was extracted
with 200 ml of acetonitrile : water (1: 1) on a wrist action
shakerd for 30 min. A 25-50 ml portion of the extract was
filtered through filter paper