喷雾干燥入口温度对草莓粉品质的影响
Effect of inlet temperature of spray drying on qualities of strawberry powder
-
摘要: 研究喷雾干燥入口温度对草莓粉品质的影响。当喷雾干燥入口温度由160℃升高到180℃时,草莓粉在水中溶解时间延长,草莓粉的晶型转变温度由41.8℃提高至47.3℃,水分活度由0.108下降到0.0887,花青素含量下降20.3%;草莓粉的粒径分布峰值由9.21μm下降到8.00μm,粒径分布宽度由11.39μm下降到10.85μm;同时,草莓粉的包埋率下降、颜色变浅、表面形态发生变化。在喷雾干燥入口温度为170℃时,草莓粉的包埋率最高达94.1%,粒径分布最均匀,稳定性较高。Abstract: The effect of inlet temperature of spray drying on qualities of strawberry powder was evaluated. When the inlet temperature raised from 160℃ to 180℃ , the dissolution time increased, the transform temperature increased from 41.8℃ to 47.3℃, the water activity decreased from 0.108 to 0.0887, the anthocyanin content lost 20.3%. The particle size distribution of the strawberry powder decreased from 9.21μm to 8.00μm, their particle size distribution width decreased from 11.39μm to 10.85μm. Moreover, the embedding rate, color and microstructure of strawberry powder were all influenced by the inlet temperature. The inlet temperature of 170℃ was the best choice with the highest embedding rate and high stability.