超声波对糖溶液物化特性的研究

研究了果糖、葡萄糖、蔗糖、麦芽糖、乳糖五种糖溶液的声速-浓度关系,结果表明:糖溶液中声速与浓度呈极显著正相关,得到的二次回归方程的回归系数大于0.9970。同时比较了声参量和密度对糖类型的辨别性,结果表明:超声检测方法对糖的种类具有更好的辨别性。探讨了声特性与糖分子结构以及糖分子与水分子的水合作用与超声参量之间的关系,表明超声参量可用于对糖溶液物化特性的研究。

Studies on the Physicochemical Properties of Sugar Solutions by Ultasonic Wave

The relation between ultrasonic velocity and sugar concentrations of fructose, glucose, sucrose, maltose and lactose were measured. Results showed that there was a significant positive correlation between ultrasonic velocity and the concentration ( M/M%) of sugar solutions, the corresponding regression equations were obtained with R2>0.997. The discrimination of sugar type through acoustic parameter and density was also compared, and it was found that ultrasonic measurement was better for sugar type discrimination. The relations between acoustic property and sugar molecular struc- ture, solute solvent interactions between water molecule and sugar molecule and ultrasonic parameters were discussed, and showed that the ultrasonic parameters can be used for physicochemical properties study of sugar solutions.