基于掠入射法溶液浓度测量系统研究

根据溶液浓度与其折射率的关系，提出用掠入射法测量溶液浓度的方法.利用其临界光线的折射角进行透明介质溶液浓度的精确测量，研发出测量实验系统.分析了临界光线的折射角与其浓度的关系，给出溶液浓度与折射角之间的简单数学解析式.用该系统对5%-80%的甘油溶液进行测量，结果最大绝对偏差小于0.003%.

Study of Solution Concentration Measurement System Based on a Method of Glancing Incidence

To essentially eliminate the measuremental errors arisen from light source power and wavelength fluctuation, a measurement method of solution concentration by means of glancing incidence was proposed. The method is based on the relationship between solution concentration and the refraction angle of the medium transparent. Such a measurement system was developed. The relationship between critical light of refraction angle and the concentration was analyzed, introducing the structure of measurement system, and the researching of measured precision and practical. The system to measuring solution concentration of standard, the test data go to regression and demarcate. A mathematical formula is based on the relationship between solution concentration and refraction angle. Different concentrations of a set of sucrose solution, with the concentration being from 5% to 80%, were measured experimentally. The maximum absolute measurement bias is no more than 0.003%. Tests show this system prospectively with practical applications of engineering.