HPLC Analysis of Polar Basic and Acetic Compounds on Primesep AB Column

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Chromatogram

Description

Mixture of polar acidic and basic compounds is separated on a Primesep AB mixed-mode HPLC column. Dopamine and tyrosine are retained by combination of reversed-phase and cation-exchange mechanisms. Maleic acid is retained by anion-exchange mechanism, and benzoic acid is retained by reversed-phase mechanism. Primesep AB is a trimodal column with a C12 hydrophobic chain and cation-exchange and anion exchange groups on the surface. Method utilizes UV detection but can be used with other detection techniques (ELSD, LC/MS, Corona).

Method Parameters

Mobile PhaseMeCN/H2O
BufferTFA – 0.1%
Flow Rate1.0 ml/min
DetectionUV, 210 nm
Class of CompoundsDrug, Acid, Monocarboxylic acid,  Hydrophilic, Ionizable, Hormone
Analyzing CompoundsTyrosine, Dopamine, Maleic Acid, Benzoic Acid

HPLC Column Used

Primesep AB, 4.6×150 mm, 5 µm, 100A