Vitamin-C in commercial and fresh orange juice samples was investigated. The commercially available juices
included packed and powdered orange juices. Different brands of commercial liquid and powdered orange juices
were included in this study. The seasonal variation of vitamin-C in fresh oranges was also explored. Fresh
cultivar of oranges including Ambersweet, Tangarin and Mandrin were selected for vitamin-C content.
Furthermore the effect of storage, packing material lined and unlined with different fabrics and preservatives on
the stability of vitamin-C in orange juice samples were investigated. Redox titration was used for measurement
of vitamin-C content in all samples. Maximum vitamin-C content was observed in end of the season fresh juice
samples. Some of the commercially available orange juices (within expiry date) showed highest vitamin-C
content, while mostly showed loss of vitamin-C during preservation process.