Modified solution approach for the gas chromatographic determination of residual monomers by head-space analysis

Experimental procedure utilizing extraction and head-space analytical method for obtaining methanol/MTBE mixed-liquid sorption isotherms in a glassy polymer

“…7-10 The experimental procedure utilized for obtaining the mixed-liquid sorption isotherms is similar to that discussed by Steichen. 7 Steichen utilized the head-space analytical method to analyze the residual monomers in their perspective polymers. The polymers were dissolved in an appropriate solvent.…”

Determination of residual monomer in polymer emulsions by extractive distillation and gas chromatography

“…g of monomer in standard area ratio of standard factor = factor X area ratio of sample X 100 % monomer = sample wt (9) Alternatively, the amount of monomer can be obtained from a calibration curve of peak area ratio a The precision of the method was demonstrated with a series of 10 determinations on a polymer emulsion containing butyl acrylate, methyl methacrylate, and styrene. This sample was also analyzed using direct injection and the precision from 10 replicate analyses determined (butyl cellosolve was the internal standard in this case).…”

Mixed aqueous solutions as dilution media in the determination of residual solvents by static headspace gas chromatography

“…Such dilution media are used for three basic reasons: they have the capacity of dissolving many water‐insoluble chemicals, they have high boiling points and thus elute at the end of the chromatogram without interfering with the RS peaks and, finally, these dilution media may allow working at thermostatting temperatures higher than 80°C, which may be necessary to achieve enough sensitivity for the RS with high boiling points. Although the use of the above‐mentioned organic solvents has been vastly published 23–32, poor sensitivity for class 1 and many other RS remains an issue. This is due to the fact that most of these RS possess high K values when dissolved in organic solvents.…”