Correlation between ic-ELISA and HPLC data for aflatoxin determination in naturally contaminated feed samples intended for broilers (A, n = 34) and for laying hens (B, n = 36). The linear regression equation y = −0.791 + 0.8827x was obtained with correlation of 0.97 (broiler feed) and y = −0.824 + 0.9892x with correlation of 0.98 (laying hen feed); x and y represent aflatoxin concentration determined independently by ic-ELISA and HPLC.