Gas chromatography procedures and equipment for the paints and inks industry: Part 2 Available to Purchase

In order to examine satisfactorily certain substances by gas chromatography they must first of all be converted into suitable derivatives with volatilities much greater than those of the parent compounds. In this class of materials are the fatty acids associated with the triglyceride oils used in alkyd resin manufacture, along with the polycarboxylic acids and polygols which are also used for this purpose. It can generally be expected that compounds containing polar functional groups that are capable of hydrogen‐bond formation will, when these are converted into suitable derivatives, be much more volatile than the parent compounds on account of the loss of these secondary bonds. It is this increased volatility which enables the substances to be successfully analysed by gas chromatography at temperatures which do not cause their thermal degradation.