摘要
采用电阻法测量了红枣的共晶点温度,其值为-32℃。在实验室冻干机上分别进行了单因素和正交实验,研究了冻结速度、枣片厚度、冻结温度和冻结时间对红枣预冻结的影响情况,得到了红枣冻干过程的冻结工艺最优参数为:冻结速度-1.0℃/min,枣片厚度8 mm,冻结温度-38℃,冻结时间210 min。
A set of experiments designed by the single factor test and the orthogonal test were carried out on a lab scale vacuum-freeze dryer.Effects of freezing rate,thickness of jujube tablets,freezing temperature and freezing time on pre-freezing of Zizyphus jujube were discussed,the best process conditions were gained as follows：freez-ing rate-1.0 ℃/min,sample thickness 8 mm,pre-freezing temperature-38 ℃,freezing time 210 min.
出处
《当代化工》
CAS
2010年第3期233-236,共4页
Contemporary Chemical Industry
基金
榆林市科技攻关项目(0599-08)
关键词
红枣
冷冻干燥
共晶点温度
Jujube Dates
freeze-drying
eutectic temperature
