葡聚糖含量使糖度测定值虚假增加的影响研究

Study on the Falsifily Increasig of Pol Determination Result by Glucan

在制糖过程中,葡聚糖对用旋光法测定的蔗糖含量有影响,本研究探索了样品中的葡聚糖对蔗糖定量测定的影响情况。实验结果表明:一是样品的糖度测定值随葡聚糖含量增加而虚假增加,且各种样品增加数值不同,对于初压汁,葡聚糖含量每增加100mg/L,糖度测定值增加0.04;对于清汁,葡聚糖含量每增加100mg/L,糖度测定值增加0.09;对于糖浆,葡聚糖含量每增加100mg/L,糖度测定值增加0.10;对于白砂糖规定量测定,溶液中葡聚糖含量每增加100mg/L,糖度测定值增加0.12。二是样品的蔗糖分测定值随葡聚糖含量改变而基本不变,即用二次旋光法基本可以消除主要的非蔗糖旋光物质-葡聚糖的影响。

In the process of sugar production, glucan affect the determination result of sugar.The amount of glucan is menstruated in the sample of sugar-refinery which included first pressured juice, clear juice, Sirup and White granulated sugar. The result showed that： （1）The sugar degree of the sample increased when the amount of glucan increased, but the amount of increasing is different. When the amount of glucan increase every 100mg/L, the sugar degree of first pressured juice increase 0.04, clear juice0.09, Sirup0.10, White granulated sugar0.12; （2） Sucrose % barely change with the different quantity, which is also mean that we can eliminate the influence of the non-cane sugar but optical rotated subject -glucan through using Second Polarimetry.