溴化法测定毛竹中聚戊糖含量

Determination of Pentosan Content in Bamboo by Bromination Method

本文建立了用溴化法测定毛竹中聚戊糖的方法。探讨了试样尺寸、蒸馏速度和馏出液体积等对测定的影响。结果表明：当试样尺寸为１ｍｍ×２ｍｍ，蒸馏速度为３０ｍｌ／ｍｉｎ，馏出液体积为４００ｍｌ时，８次测定结果表明：毛竹中聚戊糖的平均含量为２１．９０％，标准偏差为０．２９，相对标准偏差为１．３０％。

It was established that the pentosan content in bamboo is determined by bromination method. The effect of sample size, distillation speed and distillate volume etc. on the determination is described. The results showed, when the sample size is 1×2mm, the distillation speed is 30ml/min, the distillate volume is 400ml, the average content of pentosan in bamboo is 21. 9% (n=8),the standard deviation and the cofficient of variation were 0 .29 and 1 .30%,respectively.