Biochemical Studies of Annatto Coloured Guava Beverages on Storage

A study was carried out on biochemical studies of guava beverages during storage in Laboratory of the Department of Post-harvest Technology, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya during 2018-19. Pink or red guava is generally used in processing industry due to its attractive pulp colour, making a significant contribution to food industry. Colour is an integral part of any processed food product since colour makes the processed food product attractive. In the present experiment, different amounts of annatto seed were used for adding color to white fleshed guava beverages, i.e., RTS and Squash. The results reveal that 0.8 g annatto seeds were found the most appropriate quantity for colouring one-litre RTS and 2 g annatto seeds for coloring one litre squash. It was also observed that the guava RTS and squash retained normal annatto color for eight months, thereafter, both the beverages started showing non-enzymatic browning during storage. The extract of annatto seeds was also found to act as preservative for both the processed products of guava.