Preparation of Sour Grape (Vitis Vinifera) Beverages and Evaluation of their Storage Stability
Karakala Balaswamy, Pamidighantam Prabhakara Rao, Allani Nagender and Akula Satyanarayana*
Central Food Technological Research Institute (Council of Scientific and Industrial Research), Resource Centre, Habshiguda, Uppal Road, Hyderabad-500 007, India
- *Corresponding Author:
- Dr. Akula Satyanarayana
Central Food Technological Research Institute (Council of Scientific and Industrial Research)
Resource Centre, Habshiguda
Uppal Road, Hyderabad-500 007, India
E-mail: [email protected]
Received Date: April 23, 2011; Accepted Date: June 10, 2011; Published Date: July 12, 2011
Citation: Balaswamy K, Rao PP, Nagender A, Satyanarayana A (2011) Preparation of Sour Grape (Vitis Vinifera) Beverages and Evaluation of their Storage Stability. J Food Process Technol 2:116. doi: 10.4172/2157-7110.1000116
Copyright: © 2011 Balaswamy K, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
‘Thompson seedless’ grapes ( Vitis vinifera ) possessing < 13° brix and > 1.0% acidity were used in the preparation of beverages with and without carbonation. Sour grape juice was extracted, bottled and clarified by racking for three months. Palatable blended grape beverages were also prepared using sour grape juice with phalsa / purple grape juice. Process parameters such as quantity of juice, blending proportions and brix / acid ratio for different beverages were optimized. Squashes were prepared by maintaining brix at 45° and acidity 0.75%. Ready- to-serve (RTS) beverages were standardized with brix 15° and acidity 0.14%. The appearance, color and flavor characteristics of sour grape beverages were improved by blending with purple grape juice and phalsa juice at 2:1 and 1:1 ratios respectively. A set of carbonated beverages in the above combinations were also prepared to check their compatibility and acceptability. A marginal rise in total sugars and decrease in acidity were observed in all beverages after 6 months of storage. Sensory evaluation indicated that carbonated beverages were highly acceptable than plain beverages throughout the storage period. Highest scores of 7.4 and 7.5 were recorded for blended grape beverages with purple grape and phalsa juice respectively even after a storage period of 6 months.