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小型甜菜糖厂都用碘量法测定蔗糖的含量。不受氨基酸与还原糖的影响,是此法的特殊优点。因此,所得结果比旋光仪或双旋光仪法准确。但由于操作手续冗长,大量耗用昂贵的碘化钾和碘,故此法在时间和费用上均不经济。次甲基兰容量法与碘量法相比,可缩短一半时间,使用一般药品,价格较低。但该法滴定终点有时不够明显,操作条件较严,重现性欠佳。用铁氰化钾容量法比较满意,时间和用药更为经济,滴定终点很明显,操作极简便,误差不大。现介绍如下:
Small beet sugar factories are using iodine method to determine the content of sucrose. Not affected by amino acids and reducing sugars, this method is a special advantage. Therefore, the results obtained than the polarimeter or double polarimeter accurate. However, this method is not economical in terms of time and cost because of the lengthy operation and extensive use of expensive potassium iodide and iodine. Methylamine blue volume method compared with the iodometric method can be shortened by half the time, the use of generic drugs, the price is lower. However, the end of the titration method is sometimes not obvious enough, the operating conditions more stringent, poor reproducibility. With potassium ferricyanide capacity method is more satisfied with the time and medication more economical titration end point is obvious, the operation is very simple, the error is not. Now introduced as follows: