Paper chromatography of anionic disazo dyes, especially trypan blue and its red impurity.
D000838:Anions; D002854:Chromatography, Paper; D004396:Coloring Agents / Q000032:analysis*; D006801:Humans; D014343:Trypan Blue
D000838:Anions; D004396:Coloring Agents; D014343:Trypan Blue
DYES/determination