Aflatoxins were extracted from the sample by high-speed blending with aqueous acetone, purified with ammonium sulfate, re-extracted into benzene, evaporated to dryness, and redissolved in chloroform-acetone. The final solution was subjected to descending minicolumn chromatography through successive layers of alumina, silica gel, and Florisil, and the aflatoxin band was visualized by fluorescence. The method requires only 35—40 min, and results are semiquantitative.