Fig. (9) Sensitivity, linear range and detection limits for AFB1 in cases of direct and indirect ELISA, where: A-concentration of AFB1 in the range 1 - 7.6 mg/L; B-concentration of AFB1 in the range 80 - 275 mg/L; C-concentration of AFB1 in the range 400 - 3000 mg/L;