Regularities in the retention of isomeric aromatic hydrocarbons in liquid chromatography II. Analysis of polymethyl- and monoalkylbenzenes on silanized silica gel
The regularities of the retention of polymethyl- and monoalkylbenzenes on a nonpolar adsorbent (silanized silica gel) with a polar eluent (2∶3 isopropanol-water) have been studied. In contrast to the retention of the same compounds on a polar adsorbent (silica gel with hydroxylated surface) and with a nonpolar eluent (hexane) polymethylbenzenes are retained on silanized silica gel for a shorter time than the corresponding monoalkylbenzene isomers. The retention order of tert.-, sec.- and n-butylbenzenes is the reverse of that observed on silica gel having a hydroxylated surface. The retention order of xylenes, trimethyl- and tetramethylbenzenes is also the reverse of their retention order on silica gel having a hydroxylated surface. All the mixtures of the corresponding homologues and isomers have been separated.
Key WordsLiquid chromatography Aromatic hydrocarbons Molecular structure Influence on retention
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- A. N. Ageev, A. V. Kiselev andYa. I. Yashin, Doklady Akad. Nauk S.S.S.R.249, 337 (1979).Google Scholar
- A. N. Ageev, A. V. Kiselev andYa. I. Yashin, Chromatographia13, 669 (1980).Google Scholar
- T. I. Temnikova Kurs Teoretitcheskikh Osnov Organicheskoi Khimii (Theoretical Basis of Organic Chemistry) Khimiya Press, Leningrad 1968.Google Scholar