三元系溶液浓度对折射率的影响

Effect of ternary mixture solution concentration on the refractive index

通过对不同浓度碳酸钠和葡萄糖混合溶液折射率的测定,验证当组分单一或组分结构相似时,溶液的折射率和溶液的浓度呈线性关系。发现当两种单一溶液混合在一起,溶质粒子之间相互作用对折射率大小有一定的影响。并对溶质离子之间的交互作用进行了进一步分析。通过二元方程分析,得到三元系溶液折射率与浓度的函数关系n(x1,x2)=n0+Ax1+Bx2+Cx1x2,并求得影响系数C的大小。

The refractive index of three solutions with different concentration was measured in this study. The solutions were consisted of pure sodium carbonate solution, glucose solution and mixed solution. The linear relationship between the concentration and refractive index was validated, when components were single or the structures were similar. It was found that when two different singlesolutions were mixed together, the interaction between them had a certain effect on the refractive index of the solutions. According to the statistical analysis, the equation n（ x1 ,x2） = n0＋ Ax1 ＋ Bx2 ＋ Cx1x2 with coefficient C were obtained.