فهرست نشریات علمی دسترسی آزاد ایران

Numerous Analytical methods applied to determine Vitamin C or ascorbic acid (AA), an important antioxidant, in foods and fruits of various matrixes have been reported in scientific books and papers. This study is based on an analysis of the I-E charts of ascorbic acid oxidation in samples of fruits in the city of Qom. The Peak height of the first wave of ascorbic acid oxidation is used to measure AA. Also, having used standard titration and optical spectroscopy, the amount of ascorbic acid was determined. To ensure optimal conditions and factors, the measurement was performed on 17 types of fruits. The results obtained by three methods: optical spectroscopy, voltammetry and titration for measuring the ascorbic acid of 17 types of fruit were compared. Statistical analysis of the results variance for all the three methods was done. The results showed that the accuracy of the methods increase from titration, voltammetry to optical spectroscopy. The amount of ascorbic acid in fruits is different. The results of all three methods were comparable with previous reports and were satisfactory. The results, in addition to being considered a field study, can be used to select the appropriate nutritional model and analytical methods for food quality control laboratories.