Abstract
A non-intrusive concentration measurement technique was developed to investigate the ion motion in mixed electrolyte solutions using coherent anti-Stokes Raman Scattering (CARS) microscopy. With this technique, several information of chemical specificity of molecular can be obtained from molecular vibrations with high sensitivity. In this paper, experiments were conducted with ammonium chloride and sodium sulfate solution, whose characteristic Raman signal were observed at 3400 cm^<-1> and 982 cm^<-1>, respectively. In order to obtain the relationships between ion concentration and CARS intensity, CARS spectra were measured at each characteristic Raman shift by adjusting excitation wavelengths. Moreover, ion concentration distributions were measured at the junction area of Y-shaped channel by applying the relationships.
