Effects of sodium alginate film on quality of postharvest storage in Passion fruit

To study the effect of sodium alginate film on the storage quality of passion fruit,Passion fruit was coated by sodium alginate solution with the different concentration of 1%,2% and 3%,contrasting with Passion fruits soaked in distilled water. The shrinkage index,weight- loss ratio,TSS,vitamin C,titrable acidity and total sugars were determined.The results showed that the sodium alginate solution with the concentration of 2% treatment could decrease the shrinkage index and weight- loss ratio of passion fruit,it also could delay the loss of TSS,vitamin C,titrable acidity and total sugars content obviously in passion fruit.