Solubility of Trehalose in Water + Ethanol Solvent System from (288.15 to 318.15) K
Solubility of Trehalose in Water + Ethanol Solvent System from (288.15 to 318.15) K
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DOI：
10.1021/je5000428
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发表时间：
2014-05
影响因子：
--
通讯作者：
Peng Wang;Jinxia Jiang;Xiao’an Jia;Linjie Jiang;Suye Li
中科院分区：
文献类型：
--
作者：
Peng Wang;Jinxia Jiang;Xiao’an Jia;Linjie Jiang;Suye Li
在288.15~318.15 K温度范围内，用重量法测定了海藻糖在水+乙醇溶剂体系中的溶解度，水的摩尔分数为0.000~1.000。在水的摩尔分数从0.040到0.050的范围内，每条溶解度曲线上都有一个极小值。差示扫描量热法测定结果表明，水分低于临界点时，悬浮液中出现白色絮状沉淀物--无水海藻糖。高于这一点时，浆料中的晶体仍然是有水的晶型，这与无水的晶体有明显的不同。采用Jouyban-Acree模型和van‘t Hoff模型相结合的三维模型分别对含水率低于和高于临界点的溶解度数据进行了非线性曲面拟合。在含水率低于和高于临界点时，海藻糖溶解度的平均相对偏差(ARD)值均小于或等于临界点。
The solubility of trehalose in a water + ethanol solvent system was measured with the mole fraction of water ranging from 0.000 to 1.000 at temperatures from (288.15 to 318.15) K using the gravimetric method. There was a minimum point on each solubility curve at the mole fraction of water ranging from 0.040 to 0.050. The differential scanning calorimetry measurement results show that anhydrous trehalose (a white flocculent precipitate) appeared in the suspension at water content lower than the critical point. While higher than that point, the crystals in the slurry were still hydrous polymorph which is apparently different from the anhydrous one. The solubility data at water content lower and higher than the critical points were nonlinear surface fitted separately using the combination version of the Jouyban-Acree and van’t Hoff models which is a three-dimensional (3D) model. The average relative deviation (ARD) values for trehalose solubility at water content lower and higher than the critical point were...