Cloud point preconcentration and liquid chromatographic determination of aromatic amines in dyestuffs Original Research Article

Aromatic amines at μg l−1 levels in water were determined with cloud point preconcentration followed by liquid chromatography (LC) with UV absorption detection. This method was applied to the determination of aromatic amines at 10 μg g−1 levels in commercial dyestuffs. The dyestuff was dissolved in water and precleaned with a SAX cartridge packed with an anion-exchange resin; the effluent was then analyzed using the proposed cloud point preconcentration, with subsequent determination by LC.