The rapid determination of cross-linking agents in dental monomer

Abstract

A rapid method, involving the use of infrared spectrophotometry, is described for the identification and determination of the usual cross-linking agents that are mixed with methyl methacrylate in dental monomers. At selected wavelengths of maximum absorption, the absorbance of the cross-linking agent is proportional to its concentration in the mixture. By comparing the absorbances of the unknown, and a mixture prepared with methyl methacrylate and the particular cross-linking agent, each diluted with carbon disulphide, the concentration of the cross-linking agent in the former can be readily calculated.