Combination of the QuEChERS with the Dispersive Liquid-liquid Microextraction and Derivatisation in the Determination Diethylstilbestrol and Bisphenol A in Products by Gas-liquid Chromatography

A simple and rapid procedure of simultaneous determination of diethylstilbestrol and bisphenol A in canned foods (1–250 and 0.5–125 µg kg-1, respectively), drinking water, alcoholic and no alcoholic beverages (0.25-50 µg L-1 and 0.1–25 µg L-1, respectively) by gas-liquid chromatography with a detector to capture electrons developed. Diethylstilbestrol and bisphenol A from food was extracted with acetonitrile by the method of QuEChERS. Further purification and concentration of the extract was carried dispersive liquid-liquid microextraction carbon tetrachloride. The duration of the analysis was 1–1.5 h, the relative standard deviation of the results of analysis does not exceed 0.1.