A quantitative analysis of vitamin C in fruits, khat (Catha edulis), and pharmaceutical tablets using potassium iodate titration

Vitamin C, or ascorbic acid, is an essential antioxidant in various resources, such as pharmaceutical tablets, fruits, and vegetables. The human body cannot synthesize it by itself. This research aims to measure the vitamin C content in 29 commonly assessable compressed tablets, effervescent tablets, fruits, and khat (Catha edulis) leaves that are found in the Yemeni local markets. This study used a redox titration method with potassium iodate. These results reveal confirmed European and American standards and no significant difference between the measured vitamin C content in the commercial tablet (p <0.05) and the amount stated on the product label, as well as the highest amount of vitamin C content in fruits in guava (111.21 mg/100 g), while the lowest amount of vitamin C is in apple (8.72 mg/100 g).