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最精密法比色要使用两个比色皿分别装入参比溶液,浓度低的作全刻度参比即调透光率100％,浓度高的作零刻度参比即调透光率为0,如果这两个参比液的浓度在较大的范围内变化,国产的几种比色计或分光光度计很难或根本不能作最精密法比色。为了减少读数误差,一般采用控制比色液的浓度和选用不同光径的比色皿,使吸光度在0.2—0.7范围内,但对于大批含量未知的样品,很不方便。我们在综合几种比色计优点的基础上,组装和改装成了一种比色计,利用加入
The most accurate method to use two colorimetric cuvettes were loaded into the reference solution, the concentration of low for the full scale reference that is, the transmittance of 100%, the high concentration of zero-scale reference to the transfer rate of 0 , If the concentration of these two reference liquids in a larger range of changes, several domestic colorimeter or spectrophotometer is difficult or impossible for the most sophisticated method colorimetric. In order to reduce the reading error, it is generally inconvenient to control the concentration of the colorimetric solution and use cuvettes with different optical paths to make the absorbance within the range of 0.2-0.7. However, it is inconvenient for a large number of unknown samples. Based on the merits of several colorimeters, we assembled and retrofitted a colorimeter. By adding