摘要
采用响应面分析法优化紫玉米花色苷微胶囊化的配方及工艺,并对其微观特性进行表征。结果显示:喷雾干燥入口温度是影响紫玉米花色苷包埋率最主要因素;紫玉米花色苷最佳工艺为紫玉米花色苷占总固形物质量分数15%、麦芽糊精占总固形物质量分数45%、总固形物质量分数为25%和喷雾干燥入口温度140℃,在最佳工艺条件下,紫玉米花色苷包埋率为95.2%;扫描电镜和激光粒度仪分析进一步验证当喷雾干燥入口温度为140℃时,微胶囊化紫玉米花色苷的表面无明显裂痕和孔洞,粒径分布均比较集中(2～30μm),峰值出现在7.13μm。
The microencapsulation of purple corn anthocyanins by spray drying was optimized by response surface methodology.Air inlet temperature in spray drying was determined as the most important affecting factor of the percentage of embedded purple corn anthocyanins.The optimum microencapsulation conditions for purple corn anthocyanins were found to be：the content of total solids of 25%,consisting of 15%purple corn anthocyanins and 45%maltodextrin and air inlet temperature of 140℃.Under such conditions,95.2%of purple corn anthocyanins could be embedded.Scanning electron microscopic（SEM）observations and measurement in a laser particle size analyzer showed that the surface of microencapsulated purple corn anthocyanins at 140℃air inlet temperature was smooth and uniform,and the particle size distribution was concentrated,with a peak being observed at 7.13μm.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第8期61-64,共4页
Food Science
基金
北京市科学技术委员会项目(Z080005032508021)
关键词
紫玉米
花青素
喷雾干燥
响应面分析法
扫描电镜
purple corn
anthocyanins
spray drier
response surface analysis
scanning electron microscope
