| Abstract: | This paper reports an evaluation of the retention characteristics of polyethylene glycols used as liquid phases in gas chromatography.Eight different grades of polyethylene glycol were tested (Carbowax 300, 400, 600, 1000, 1540, 4000, 6000 and 20M) and their retention volumes for various homologous series were measured (n-alkanes, l-alcohols, methyl alkyl ketones and linear chloro-, bromo- and iodoalkanes).Effects of the molecular weight, of temperature, and of the position of the hydroxyl group were examined, and the activity coefficients calculated. |
