食品工业科技2017，Vol.38Issue(11)：189-194,6.DOI:10.13386/j.issn1002-0306.2017.11.027
干燥工艺对紫薯全粉理化性质及花色苷的影响
Effect of different drying methods on physico-functional properties and anthocyanins of purple-fleshed sweet potato flours
摘要
Abstract
In order to improve the quality of purple sweet potato flours and retain the nutritional value,effects of hot air drying,drum drying and vacuum freeze drying on physic-functional and anthocyanins of flours prepared from purple sweet potato variety Q-18 were evaluated.The color,granule structure,water absorbing capacity and freeze-thaw capacity,granule structure,content and components of total anthocyanins were measured.The results showed that different drying methods had effect on the physic-functional properties and content of anthocyanins of purple sweet potato flours (p ＜ 0.05).Flours prepared by vacuum freeze drying could keep the color and aroma better and the water absorbing capacity (6.900 g/g),freeze-thaw capacity (0.171 g/g) and anthocyanin content (5.030 mg/g DW)were better than the other two drying methods.Flours prepared by drum drying were also in good quality as the water absorption capacity,freeze-thaw capacity and anthocyanins content were 6.185,0.341 g/g DW and 4.047 mg/g DW respectively.Hot air drying had a significant effect on the content of anthocyanins (2.094 mg/g DW).It was nearly half of the drum drying.LC-MS showed that drying methods had little effect on the types of anthocyanins,while it could affect the total content and relative content of anthocyanins.Some organic acids tended to drop when heating.In a word,the quality of flours prepared by drum drying is good,second only to freeze drying,which is suitable for large -scale industrialization.As a result,drum drying is a good choice for the preparation of purple sweet potato flours.关键词
紫薯全粉/热风干燥/滚筒干燥/真空冷冻干燥/花色苷Key words
purple sweet potato flours/hot air drying/drum drying/vacuum freeze drying/anthocyanin分类
轻工纺织引用本文复制引用
钱丽,杨瑞金,赵伟,华霄,张文斌..干燥工艺对紫薯全粉理化性质及花色苷的影响[J].食品工业科技,2017,38(11):189-194,6.基金项目
国家自然科学基金(31230057/003 （）
31101376) （）
国家科技支撑计划(2014BAD04B01). （2014BAD04B01）
