Real-time monitoring of emulsion polymerization by Raman spectroscopy has been performed. In order to extract information concerning the progress of the reaction, modelling under LabSpec was done. For this, .model. spectra were selected. The deconvolution operation of LabSpec provides a calculation of the contributions of each of these model spectra to the current spectrum. The concentration profiles of the constituents during the reaction are drawn from the quantitative values derived from the deconvolution.