Electrochemical study of blackberry berries, leaves and roots related to Tarom region of Zanjan-Iran

Oxidation is one of the most important chemical processes in food and chemicals. Free radicals can oxidize nucleic acids, proteins and lipids, initiating degenerative diseases ۱-۳. Cyclic voltammetry is a unique technique for the electrochemical characterization of compounds by providing data about their oxidation/reduction potentials. Beside simplicity and rapidness, this technique is based on the chemico-physical properties of the molecules and can be widely used in evaluating antioxidant in oil and food stuff ۴. The literature review shows that there is a good correlation between the oxidation potentials of various antioxidant and their antioxidant effiEnglish – detected. It is clear that the data obtained by different assays reflect only the specific antioxidant capacity in the corresponding system. But it should be noted that antioxidant capacity is not dependent on one simple specific reaction and different mechanisms could be involved in antioxidant activity. In order to evaluate the overall antioxidant capability present in food and medicinal plants, electrochemical approaches without use of a certain reactive species could be applied ۵. Different screening methods have been reported for the evaluation of antioxidant properties of plant extracts in the literature. In the present research a rapid screening method has been introduced based on cyclic voltammetry for antioxidant screening of some selected medicinal plant extracts. Cyclic Voltammetry of methanolic extracts of : blackberry berries, leaves and roots related was carried out at different scan rates. Based on the interpretation of voltammograms, blackberry berries contained the highest amount of antioxidants. Cyclic voltammetry is expected to be a simple method for screening antioxidants and estimating the antioxidant activity of foods and medicinal plants.

Keywords:

Cyclic voltammetry , Antioxidant , Plant extracts , Electrochemical