Development and validation of a hydrophilic interaction liquid chromatographic method for determination of aromatic amines in environmental water

A simple, precise, and accurate hydrophilic interaction liquid chromatographic (HILIC) method has been developed for the determination of five aromatic amines in environmental water samples Chromatography was carried out on a bare silica column, using a mixture of acetonitrile and a buffer of NaH2PO4-H3PO4 (pH 1 5, containing 10 mM NaH2PO4) (85.15. v/v) as a mobile phase at a flow rate of 1 mL mm(-1). Aromatic amines were detected by UV absorbance at 254 nm. The linear range of amines was good (r(2) > 0 998) and limit of detection (LOD) within 0.02-0.2 mg L-1 (S/N = 3). The retention mechanism for the analytes under the optimum conditions was determined to be a combination of adsorption. partition and ionic interactions The proposed method was applied to the environmental water samples Aromatic amines were Isolated aqueous samples using solid-phase extraction (SPE) with Oasis HLB cartridges Recoveries of greater than 75% with precision (IRSID) less than 12% were obtained at amine concentrations of 5-50 mu g L-1 ;from 100 mL river water and influents from a wastewater treatment plant (WWTP). The present HILIC technique proved to be a viable method for the analysis of aromatic amines in the environmental water