Abstract
For the investigation of ion motion in mixed electrolyte solutions, a non-intrusive sensing technique was developed using coherent anti-Stokes Raman scattering (CARS) generated by a femtosecond pulsed laser. This technique, CARS microscopy, provides rapid quantitative information from molecular vibrations with high spatial and temporal resolution. Two experiments were conducted, with pure electrolyte solutions of sodium sulfate and ammonium chloride used for the first experiment and mixed solutions with both substances used for the second experiment. In each experiment, the relationship between the ion concentration and the CARS intensity was investigated. A reference value was obtained and the CARS intensity ratio was calculated to eliminate the influence of fluctuations in the CARS intensity.
