Effects of Sodium Alginate and CMC-Na Coatings on the Storage Characteristics of Fresh-cut Cowpea
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Abstract:
In order to improve the quality of fresh-cut cowpea, the effects of two kinds of coating agents, sodium alginate (0.6%, m/m) and CMC-Na (0.8%, m/m), were studied. The results showed that compared with the control, both sodium alginate and CMC-Na coating could effectively lower the respiration intensity and maintain high soluble solid content, reduce the loss of vitamin C and chlorophyll, maintain a higher peroxidase activity and reduce the accumulation of malondialdehyde in fresh-cut cowpea. After the fresh-cut cowpea coated with sodium alginate was stored for 12 days, its respiration intensity was 237.67 mg/(kg·h). The contents of vitamin C, chlorophyll and soluble solids were respectively 13.06 mg/100 g, 0.62 mg/g and 0.49% higher, while malondialdehyde content was 11.36% lower than that of CMC-Na group. These results indicated that sodium alginate coating contributed to maintain the quality of the fresh-cut cowpea and prolong the storage time, which had the potential application in the storage of cowpea.
