We need to analyse the solids of a clear melamine formaldehyde resin and we need a quick method. I read that you can make a relation between the % of solids and the refraction index value, but i can not find more information. Thanks.
It is possible, because there is a law that states that the refractive index depends linearly on concentration like Beer's law and absorbance. For details (full text available): Article Beyond Beer's Law: Why the Index of Refraction Depends (Almo...