Chromatographic behaviour of alkylbenzenes and alkyl benzoates on porous micro-spherical poly(styrene-divinylbenzene) gel
✍ Scribed by Atsuo Nakae; Giichi Muto
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 479 KB
- Volume
- 120
- Category
- Article
- ISSN
- 1873-3778
No coin nor oath required. For personal study only.
✦ Synopsis
jrfomologous series of alkylbenzenes and alkyl benzoates were analyzed by high-performance liqlrid chromatography employing a porous micro-spherical poly-(styrene-divinylbenne) gel as the stationary phase wizh various proportions of methanol_and water as the mobile phase. In each series of alkylbenzenes and alkyl benzoates, the elution order followed the order of increasing alkyl chain length. The capacity factors increased with increasin, = water content in the eluent, but decreased as the column temperature increased. The logarithm of the capacity factor for each homologous series was directly proportional to the carbon number. The reciprocal of the column temperature was also directly proportional to the logarithm of the capacity factor. The results might be explainable in terms of the theory of liquidliquid partition chromatography.
ENJXODUCDON Recently, high-efhciency separations by liquid chromatography have been studied extensively by many investigators, because liquid chromato_mphy is now comparable to gas chromatography in terms of convenience, speed Andy efiiciency. Liquid chromatography is a useful means for the direct analysis of high-molecularweight; thermally unstable, inorganic and non-volatile compounds.
' The EipOphilic groups of surface-active agents are usually determined by gas chromatography. This method, however, requires their conversion into volatile derivatives before analysis. In a previous paper', we reported the separations of : homologous series of .alkylbenzyldimethylammonium chIorides and alkylpyridinium haliksby high~performance liquid chromatography without pre-treatment, empIoying a porous &icro-spherical polyfbenzene~ gel as a stationary phase with .