Gas chromatography in qualitative analysis : XV. Deactivation of diatomaceous supports by amine antioxidants

Abstract

Errors in qualitative gas chromatographic analysis due to the oxidation of apolar stationay phases and the adsorption of polar solutes are reduced by pre- treatment of diatomaaceous supports with amine antioxidants. Addition of small quantities of N,N′-disubstituted p-phenylenediamines to column packings is shown to prevent peak tailing, due to the adsorption of polar solute molecules at the liquid—solid interface, and solute decomposition. The protective film is shown to have a slightly superior thermal stability to that provided by diglycerol but to have a greater influence upon retention data.