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使用Duboscq此色计时,若按常规操作,则在比色前应先调节光源(如移动比色计的方向或反光镜的角度),使视野两半影的光度相同。可是由于比色计使用时间长久后,其光学系统发生改变,或比色杯及镜柱被污损,往往很不易调节到使视野两半影的光度达到理想那样。为了改进这种情况,我在实际工作中曾注意寻求改进的办法,结果认为用下述方法进行调节光度是简便而又较精确。今介结如下,供使用比色计的同志们参考。使用比色计时,一般是将左侧杯子注入被测液,右侧杯子注入标准液,然后把右侧固定在20.0刻度进行比色,并调节左侧螺旋使视野两半影的光度相同,读取刻度数。改进后的方法
With the Duboscq colorimeter, adjust the light source (such as the direction of the moving colorimeter or the angle of the reflector) before the colorimetric to make the same half-field of light in the field of view, as usual. However, due to the use of colorimeters for a long time, the optical system changes, or cuvettes and columns were fouled, often difficult to adjust the two halves of the field of vision to achieve the desired brightness. In order to improve the situation, I paid attention to the improvement measures in practical work. As a result, I found it convenient and accurate to adjust the brightness by the following method. This referral as follows, for the use of colorimeter comrades reference. The use of colorimetric timing, the general is the left cup into the test solution, the right cup into the standard solution, and then fixed to the right side of the 20.0 scale for colorimetric, and adjust the left side of the spiral so that the brightness of the two halves of the same brightness, read Take the scale. Improved method