Pullulan-based coatings for preservation of razor clam Sinonovacula constricta

Glutathione has antioxidant activity, and citric acid exhibits acidity. Potassium sorbate displays antibacterial activity. Effects of pullulan-based coatings with 0.05% glutathione, 0.5% citric acid and 0.2% potassium sorbate on the preservation of razor clam Sinonovacula constricta meats (SCMs) during refrigerated storage (∼2 °C) were investigated. The glutathione-, citric acid- and potassium sorbate-incorporated pullulan-based coatings inhibited bacterial growth. Moreover, results showed reduced increase in pH, decreased total volatile basic nitrogen and enhanced overall acceptability score of SCMs during refrigerated storage (∼2 °C). These results indicated that treatment with pullulan-based coatings with glutathione, citric acid and potassium sorbate could prolong the shelf life of SCM for up to 10 days.