Conclusion
Frozen strawberry suffers from color bleaching and texture loss. Ca lactate treatment presumably stabilizes the original structure of the strawberries and delays the changes of physico-chemical properties while citric acid inhabits the browning reaction and maintains anthocyanin content during freezing. The precooling treatment did not appear any enhancer affect in the quality indices of frozen berries. The pretreatment with combination of 0.4% citric acid – 1% Ca lactate dip achieved the highest quality attributes, including reduction in drip loss and enhancement of firmness and the retention of ascorbic acid and anthocyanin content as well as color attributes.