Fluorometric screening method for citrinin in corn, barley, and peanuts

A fluorometric method is described for rapid screening of citrinin in corn, barley, and peanuts. The initial extraction uses an aqueous acidified acetonitrile solution, and the resulting extract is partially purified by several acid-base partition steps. Citrinin is determined by using a fluorometer. Mean recoveries of added citrinin from corn, barley, and peanuts were 56.4, 66.6, and 40.0%, respectively, at levels of 100-8000 ng/g.