食品科学 ›› 2011, Vol. 32 ›› Issue (10): 300-303.doi: 10.7506/spkx1002-6630-201110069

• 技术应用 • 上一篇    下一篇

青稞麦绿素粉冷冻干燥制备工艺优化

段黎昊,陈元涛,张炜,王晓兰,蔡林森,范燕青,哈文秀   

  1. 1.青海师范大学化学系 2.青海师范大学互助青稞研究与开发中心
  • 出版日期:2011-05-25 发布日期:2011-04-08
  • 基金资助:
    青海省重点科技攻关项目(2007-N-120);科技部科技人员服务企业行动项目(2009GJG20017);     教育部“新世纪优秀人才支持计划”项目(NCET-07-0476)

Optimization of Preparation Process for Vacuum Freeze-drying Highland Barley Green Powder

DUAN Li-hao1,2,CHEN Yuan-tao1,2,*,ZHANG Wei1,WANG Xiao-lan1,2,CAI Lin-sen1,2, FAN Yan-qing2,HA Wen-xiu1   

  1. 1. Department of Chemistry, Qinghai Normal University, Xining 810008, China; 2. Huzhu Highland Barley Research and Development Center, Qinghai Normal University, Xining 810008, China
  • Online:2011-05-25 Published:2011-04-08

摘要: 以干燥速率、总黄酮保留量和SOD保留量为指标,对真空冷冻干燥青稞麦绿素粉的影响因素进行分析,确定青稞麦绿素粉冷冻干燥的最佳工艺条件:预冻温度-40℃、预冻时间4h、装填厚度5mm、工作压力60Pa、升华温度40℃、解析温度50℃。在此最优工艺条件下制备的青稞麦绿素粉中总黄酮保留量69.3%、SOD保留量20.1%,且色泽鲜绿,气味保留了青草香味。结果表明,冷冻干燥法是制备高品质青稞麦绿素粉的有效方法。

关键词: 青稞, 麦绿素, 真空冷冻, 干燥, 工艺

Abstract: The effect of vacuum freeze-drying on highland barley green powder was investigated using freeze-drying velocity and retention rate of flavonoids and SOD as the indicators. The optimal process conditions were explored to be pre-freezing temperature of -40 ℃, pre-freezing time of 4 h, loading materiel thickness of 5 mm, working pressure of 60 Pa, sublimation temperature of 40 ℃ and resolution temperature of 50 ℃. Under the optimal conditions, the retention rates of flavonoids and SOD were 69.3% and 20.1%, respectively. The sample revealed bright green color and fresh grass smell. These results indicated that vacuum freeze-drying was a useful method to prepare highland barley green powder.

Key words: highland barley, barley green powder, vacuum freezing, drying

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