المجلة الدولية للعلوم والتقنية

Fruit juices are known to contain many organic acids, the most important of which is ascorbic acid (vitamin C), because of its nutritional values and benefits for human health and disease prevention. These acids are found in fresh fruits from which the juice is made or are added as a nutritional supplement during manufacturing. This study aims to evaluate the quality of some local packaged juices available in the Libyan market for 5 local companies: (Al-Rayhan, Al-Mazraa, Judy, Al-Morouj, and Zain), with the results of previous studies and Libyan standards. in terms of the total amount of vitamin C, due to the large use of these packaged juices in the diet of adults and children in particular, as samples of packaged juices of different types (pineapple, orange, pear, guava, peaches, grapes, and others) available in various commercial markets and in a random manner after a storage period ranging between 6-10 months from the date of production, at a rate of 3 samples for each. It was analyzed spectrophotometrically using a molecular absorption spectrometer for visible and ultraviolet radiation (JENWAY 6405 UV/Vis. Spectrophotometer). The resultes shown that the amount of vitamin C in all samples was with in the limit and conformed to Libyan standards, and the best in vitamin C content was at Al-Rayhan Company and the least was at Zain Company. Keywords: Ascorbic acid, Vitamin C, packaged juices, spectrophotometric method, standard curve, (UV/Vis. Spectrophotometer)