食品科学 ›› 2011, Vol. 32 ›› Issue (10): 92-96.doi: 10.7506/spkx1002-6630-201110021

• 工艺技术 • 上一篇    下一篇

提高冻干山药片品质的工艺优化

孙 慧,江 敏,朱兆娜,杨 毅,潘 见   

  1. 合肥工业大学 农产品生物化工教育部工程研究中心
  • 出版日期:2011-05-25 发布日期:2011-04-08

Optimal Process for Quality Improvement of Freeze-dried Yam Slices

SUN Hui,JIANG Min,ZHU Zhao-na,YANG Yi,PAN Jian   

  1. Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230009, China
  • Online:2011-05-25 Published:2011-04-08

摘要: 为改善冻干山药片的复原率、质构、色泽以及口感,对加工过程中的烫漂、浸泡液处理方案和冻干工艺进行研究。结果表明:山药片在95℃条件下烫漂60s可防褐变,并有利于后续的浸泡和冻干;用含有5% NaCl、10%葡萄糖和10%麦芽糊精的浸泡液,在30℃条件下浸泡30min,可提高复原率;较优的冻干工艺为使用带有强对流鼓风的速冻生产线在-30℃条件下对山药片冻结,采用5℃保持7h,35℃保持2h程序冻干。该工艺生产出的山药片具有较好的复原率和感官品质。

关键词: 山药片, 烫漂, 麦芽糊精, 冻干

Abstract: In order to improve recovery rate, texture, color and taste of freeze-dried yam slices, crucial steps in the preparation process of yam slices such as blanching, soaking treatment and freeze-drying were investigated. The results indicated that the optimal blanching of yam slices at 95 ℃ for 60 s could prevent browning and consequently was beneficial to soaking and freeze-drying. The optimal soaking process at 30 ℃ for 30 min using soaking solution composed of 5% NaCl, 10% glucose and 10% maltodextrin could improve recovery rate. The optimal freeze-dried process was quick-freezing at -30 ℃, and then sequential freeze-drying at 5 ℃ for 7 h and 35 ℃ for 2 h. Freeze-dried yam slices obtained using the optimized process displayed better recovery and sensory quality.

Key words: yam slices, blanching, maltodextrin, freeze-drying

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