Determination of the Antioxidant Capacity of Pharmaceuticals by Potentiometry: Indicators of Measurement Accuracy

The antioxidant capacity (AOC) of water–alcohol tinctures of medicinal plant materials, vitamins, and vitamin complexes was investigated. The accuracy indicators for determining the antioxidant capacity of these samples are found; the accuracy of the measurement results is examined using a sample of ascorbic acid with a known concentration of the main component. The relative measurement error of the antioxidant capacity of herbal and synthetic medications does not exceed 10%.