ascorbic acid content was retained at 50 °C and 70 °C, respectively, for a
treatment time of 15 min. This clearly indicates the temperature sensitivity of ascorbic acid. The maximum loss of 27% was observed at 600 MPa/
70 °C/20 min. Overall, data for ascorbic acid in the litchi based beverage
was in line with expectations, as significant losses (p N 0.05) in ascorbic
acid in processed foods are also associated with chemical degradation,
in particular, aerobic degradation, which produces L-dehydroascorbic
acid, a compound with no vitamin activity (Coultate, 1996; Barba,
Esteve & Frigola, 2010). The ascorbic acid stability is also largely dependent on the oxygen concentration incorporated during the homogenization of the beverage before packing
ascorbic acid content was retained at 50 °C and 70 °C, respectively, for atreatment time of 15 min. This clearly indicates the temperature sensitivity of ascorbic acid. The maximum loss of 27% was observed at 600 MPa/70 °C/20 min. Overall, data for ascorbic acid in the litchi based beveragewas in line with expectations, as significant losses (p N 0.05) in ascorbicacid in processed foods are also associated with chemical degradation,in particular, aerobic degradation, which produces L-dehydroascorbicacid, a compound with no vitamin activity (Coultate, 1996; Barba,Esteve & Frigola, 2010). The ascorbic acid stability is also largely dependent on the oxygen concentration incorporated during the homogenization of the beverage before packing
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