砷钼酸比色法※,可分别测定植株样品中还原糖和非还原糖的含量。测定非还原糖(蔗糖)时,先要用稀酸水解成为还原糖,以稀碱中和以后,再行测定。在大批样品的测定中,我们发现用甲基红变色(变色的PH值范围为4.4～6.2)来控制中和时的PH值,往往不能准确测定蔗糖的含量,而必须把溶液PH值调到6.4～8.0之间。本文就蔗 Arsenic molybdate colorimetric method ※, respectively, the determination of plant samples of reducing sugar and non-reducing sugar content. Determination of non-reducing sugar (sucrose), the first to use dilute acid hydrolysis as reducing sugar to dilute alkali and later measured again. In a large number of samples, we found that using methyl red discoloration (discoloring pH range 4.4 ~ 6.2) to control the PH value of neutralization, often can not accurately determine the content of sucrose, and the pH value of the solution must be transferred 6.4 ~ 8.0 between. This article on sugarcane