Abstract
Separation and determination of products formed by sulphonation of alkylphenols were accomplished by reversed-phase ion-pair liquid chromatography and UV detection. The chromatographic system consisted of aqueous eluents with methanol as organic modifier, tetraethylammonium as ion-pairing agent and LiChrosorb RP-8 as stationary phase. The presence of less than 0.1% of a compound could be determined with acceptable precision and accuracy. A comparison was made between various chromatographic systems containing methanol or acetonitrile as organic modifiers and tetraethyl-, tetrapropyl- or tetrabutylammonium as ion-pairing agents. Separation factors were determined between compounds differing in the nature and positions of alkyl and polar substituents.
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