Development and Quality Evaluation of Mixed Fruit (Carrot and Kinnow) based RTS

摘要

Experimental studies were conducted for the production of kinnow and carrot based RTS beverage and its quality evaluation. The quality attributes comprised of acidity, pH, optical density, TSS, ascorbic acid, total plate count and sensory quality parameters on 9- point hedonic scale. Evaluation of quality parameters were done for fresh as well as stored RTS samples at 0, 15, 30, 45, 60, 75 and 90 days of storage under different storage conditions. RTS beverage kinnow and carrot samples were packed inglass bottles. The TSS and acidity of kinnow and carrot RTS beverage increased with increase in the level of kinnow juice ratio at different storage condition and the optical density increased with increase in the level of carrot juice ratio. The pH decreased with increase in the level of carrot juice and pH values of the samples composition 80:20,70:30 and 60:40 after 90 days of storage were observed as 1.88,1.95 and 2.00, respectively at refrigerated condition. The total plate count (TPC) of the RTSsamples of different kinnow and carrot juice ratio of 80:20, 70:30 and 60:40 were observed as 1.041x10~5cfu/ml, 1.043x10~5cfu/ml and 1.044x10~5cfu/ml at refrigerated temperature. The microbial growth increased during storage period irrespective of carrotjuice ratio at different storage conditions. The minimum ascorbic acid level of the sample of juice ratio (kinnow: carrot) 80:20, 70:30 and 60:40 after 90 days of storage were observed as 1.90,1.67 and 1.50, respectively at refrigerated condition. The higher score of overall acceptability was 7.92 for the fresh samples and the minimum score awarded for overall acceptability was 6.22 for the RTS sample, kinnow and carrot juice ratio 80:20 at refrigerated condition. However, the overall acceptability ofbeverage decreased with increase in storage period. It was concluded that refrigerated storage method was found to be superior over other methods of storage of kinnow and carrot based RTS beverage followed by BOD incubator and room temperature conditions.