简易浓度测定方法的研究

Studying of simple and easy method in measuring density

浓度是反映溶液性质的一个重要参数，现有的各种测量方法各有其特点。文献［１］是根据光学原理，运用显微镜调焦方法提出了测量透明材料厚度和折射率的方法；在此基础上，根据不少溶液的折射率和浓度均有定量对应关系的特点，提出测定浓度的简易方法。该测量方法有下列特点：非接触测量，采样液体少，对液体无特殊要求，适用面广，装置简单。实验结果得出，百分浓度的测量可精确到０１％。用该方法同一些常规方法相比，测量误差在１％左右，能满足有关生产和工作中的使用要求。

Density is an important parameter showing the nature of solution, and all kinds of available methods in measuring density have their respective features. In reference , based on optical principle, and using Microscope's focusing method, a method of measuring the thickness and refractive index of transparent material is presented; Besides, according to the quantitative correspondence relationship between the refractive index and the density of some solution, a method of measuring the density of solution is presented too. The method has some features as follows: non contact measurement, little sampling, no special requirement about fluid, wide using range and simple apparatus. The result of experiment is the percentage density measuring accuracy can reach 0.1%. Compared with other conventional methods, the percentage deviation of this method is about 1%, so this method can satisfy the demands in related production and work.