各种物理-化学分析方法中,折射率分析法具有一系列的优点:测定混合剂组份含量的准确性高、经济、迅速,操作简便。库尔斯克的铬鞣革工厂里,拟定用折射率的方法测定固定剂的成份。首先,测定标准溶液的折射指数和密度。折射指数用ИРФ-22型折射计测定,密度用一套普通用途的液体比重计测定。测定的结果列在表1内。折射指数和密度的大小同固定剂成份的 Among various physico-chemical analysis methods, the refractive index analysis has a series of advantages: high accuracy, economy, speed and easy operation for determining the content of the mixture component. In Kursk’s chrome-tanned leather factory, the composition of the fixative is determined by the method of refractive index. First, the refractive index and density of the standard solution are measured. The refractive index was measured with a ИРФ-22 refractometer and the density was determined using a common set of hydrometer. The results of the measurement are shown in Table 1. Refractive index and density of the same size as the fixative ingredients