For the first time, the possibility of using stripping voltammetry for the simultaneous determination of aflatoxins B1 and M1 on a glassy-carbon electrode has been shown. The influence of various factors (Ie, τe, w, and the nature of the background electrolyte) on the potential and magnitude of the oxidation current of mycotoxins has been estimated. Working conditions for voltammetric determination and reproducibility of analytical signals for two mycotoxins have been selected. The mutual influence of aflatoxins B1 and M1 on the value of analytical signals in their simultaneous presence has been studied. It has been found that, in the range of their detectable contents, the presence of aflatoxin B1 reduces the analytical signal of aflatoxin M1 by 45-50%, but the linearity of the calibration dependence is preserved. The content of aflatoxin M1 in determination of aflatoxin B1 does not exert a significant effect in the range of 10-15%. Based on the results obtained, a procedure has been proposed for determining the content of aflatoxins B1 and M1 in their joint presence in milk by voltammetry in the concentration ranges 2 × 10-3 ÷ 2 × 10-1 mg/dm3 and 2 × 10-4 ÷ 2 × 10-2 mg/dm3, respectively (Sr not more than 18%).
ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)
- Computer Science Applications