In the present study, the influence of disperse systems on Raman scattering was investigated. How an increasing particle concentration weakens the quantitative signal of the Raman spectrum is shown. Furthermore, the change in the position of the optimal measurement point in the fluid was considered in detail. Additional transmission measurements can be used to derive a simple and robust correction method that allows the actual concentration of the continuous phase to be determined with a standard deviation of 2.6%.
Keywords: UV/VIS-spectroscopy; continuous phase; disperse phase; optical spectroscopy; particle measurement; process control; process engineering; raman-spectroscopy; suspension measurement.