Impact and evaluation of different drying methods on the quality of Prunus mume flowers
[Objective]The impact of different drying methods on the quality of dried Prunus mume flowers is to be studied and evaluated,so as to provide reference for maintaining the quality of dried P.mume flowers in drying process.[Method]4 different drying methods(hot air drying,microwave drying,compound drying and vacuum freeze-drying)were used to treat 8 P.mume flower cultivars('Dongfang Zhusha''Guhong Zhusha''Xiaohong Gongfen''Fenpi Gongfen''Fentai Yudie''Yueguang Yudie''Jiuguang Lve'and'Suyu Lv').Color difference,antioxidant capacity,and total flavonoid content were used as evaluation indicators to compare the impact of different drying methods on the quality of P.mume flowers.The entropy weight-coefficient of variation method was used for combined weighting to calculate the comprehensive score.The evaluation model was verified by the weighted proximation ideal solution sorting method and the optimal drying method was obtained.[Result]The color difference and shrinkage rate treated with vacuum freeze-drying were the smallest,less than 33.09 and 28.7％,respectively,and the total flavonoids,anthocyanins,and total chlorogenic acid mass fractions of the samples were the highest.The soluble protein mass fraction and antioxidant capacity of the materials treated with vacuum freezing and composite drying methods were the highest.The retention rate of volatile substances was the highest after composite drying,exceeding 50％.The comprehensive scores ranking from high to low was vacuum freeze-drying group,composite drying group,hot air drying group,and microwave drying group.[Conclusion]The mass fraction of active ingredients is the highest after vacuum freeze-drying,followed by composite drying.The quality of P.mume flowers is the best after vacuum freeze-drying and composite drying,which can be used for high-quality processing and mass production.[Ch,8 fig.6 tab.29 ref.]
万方数据
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