Aromatic Amine Impurities in Yellow AB and Yellow OB Food Dyes

Chromatography

“…Aromatic amines have been chromatographed on reversed-phase partition columns (224), and, in the form of their azo derivatives, on adsorption columns (804). Paper chromatography has been used for aminoanthraquinones (364), isomers of phenylenediamine (345),…”

Food

“…has been developed (126). A device for continuous measurement of ultraviolet light absorption of eluent from columns used to chromatograph a commercial food dye permits the determination of residual 2-naphthylamine (79). A measurement of absorbance at 500 µ has been proposed as a more reliable index of the color of edible oils (279).…”