Polymer analysis by column liquid chromatography coupled semi-on-line with Fourier transform infrared spectrometry

Publisher Website
Google Scholar
Abstract
Additives in polymers were identified by solvent-elimination based coupling of reversed-phase column LC and FTIR spectrometry. A spray-jet interface was used to deposit the effluent from a narrow-bore LC column on a zinc selenide window. The deposited additives were analysed by FTIR transmission microscopy, yielding identification limits in the low-nanogram range. Good-quality IR spectra were obtained for components present in PVC and polypropylene samples. These spectra allowed the characterization of the additives by spectral library search and/or spectral interpretation. The usefulness of the spray-jet interface system for the coupling of size-exclusion chromatography (SEC) and FTIR spectrometry was examined on the basis of the analysis of a polystyrene standard mixture. Representative IR spectra of the SEC effluent indicate that the SEC–FTIR system can be used for the determination of compositional changes across the polymer molecular mass distribution.

This publication has 0 references indexed in Scilit: