Fruit Preservative Composed of Bamboo Vinegar, Polyvinyl Alcohol, and Citric Acid for Mulberry Preservation
Keywords:
Bamboo vinegar, Polyvinyl alcohol, Citric acid, Mulberry preservationAbstract
In order to solve the problem of spoilage of mulberry after harvest, this study discusses the effect of various concentrations of composite preservatives on the preservation effect of mulberry, so as to achieve the purpose of prolonging its shelf life. Taking mulberry as raw material, three preservatives of bamboo vinegar, polyvinyl alcohol, and citric acid were selected, and the physical and chemical indexes used were sensory evaluation, firmness, weight loss rate, decay percentage, soluble solid content, vitamin C content, and POD activity, and the optimal concentration of each preservative was determined to be 1.0% bamboo vinegar, 3.0% polyvinyl alcohol (PVOH), and 1.0 % citric acid by single factor test at room temperature. The orthogonal test screened 1.0% bamboo vinegar, 3.5% PVOH, and 0.8% citric acid as the optimal compound combination, which could effectively extend the shelf life of mulberry for at least 48 h compared to the blank control and commercial groups. This study provided a safe and efficient compound preservative solution for mulberry preservation.