A method for determining the size and count of particles dispersed in a light-transmissive medium , comprising: a) directing an excitation light into the medium , wherein the excitation light is monochromatic; b) collecting from the medium a first Raman spectrum using a Raman spectrometer; c) analyzing the first Raman spectrum to determine a composition of the medium ; d) computing a first ratio of a band of red light in the first Raman spectrum to a band of blue light in the first Raman spectrum, wherein the band of red light and the band of blue light are selected based on the maximum difference in band position and on the intensity of each band; e) waiting a pre-determined period of time, during which particles may form within the medium ; f) after the pre-determined period, directing the excitation light into the medium and collecting from the medium a second Raman spectrum using the Raman spectrometer; g) computing a second ratio of a band of red light in the second Raman spectrum to a band of blue light in the second Raman spectrum; wherein the band of red light in the first Raman spectrum and the band of red light in the second Raman spectrum are the same, and wherein the band of blue light in the first Raman spectrum and the band of blue light in the second Raman spectrum are the same; h) comparing the second ratio to the first ratio; and i) determining the size and the count of particles dispersed in the medium based on the comparison of the second ratio to the first ratio, wherein particle size and count information is obtained from an analysis of the Tyndall scattering of the first and second Raman spectra caused by particles within the medium . a) directing an excitation light into the medium , wherein the excitation light is monochromatic; b) collecting from the medium a first Raman spectrum using a Raman spectrometer; c) analyzing the first Raman spectrum to determine a composition of the medium ; d) computing a first ratio of a band of red light in the first Raman spectrum to a band of blue light in the first Raman spectrum, wherein the band of red light and the band of blue light are selected based on the maximum difference in band position and on the intensity of each band; e) waiting a pre-determined period of time, during which particles may form within the medium ; f) after the pre-determined period, directing the excitation light into the medium and collecting from the medium a second Raman spectrum using the Raman spectrometer; g) computing a second ratio of a band of red light in the second Raman spectrum to a band of blue light in the second Raman spectrum; wherein the band of red light in the first Raman spectrum and the band of red light in the second Raman spectrum are the same, and wherein the band of blue light in the first Raman spectrum and the band of blue light in the second Raman spectrum are the same; h) comparing the second ratio to the first ratio; and i) determining the size and the count of particles dispersed in the medium based on the comparison of the second ratio to the first ratio, wherein particle size and count information is obtained from an analysis of the Tyndall scattering of the first and second Raman spectra caused by particles within the medium . <EOS>