SELECTIVE SEPARATION OF P-DIMETHYLAMINOBENZALDEHYDE FROM SOME SECONDARY AND TERTIARY-AMINES

The chromatographic behavior of aromatic amines has been studied on pl ain and mixed adsorbent layers, e.g. silica gel, alumina, cellulose, a nd a 4:1 mixture of cellulose and silica gel, using various aqueous an d nonaqueous mobile phases. The proposed method is simple, rapid, repr oducible, and applicable to the identification and separation of aroma tic amines over a wide range of concentration. It is specially suitabl e for selective separation of p- dimethylaminobenzaldehyde from p- dim ethylaminocinnamaldehyde, diphenylamine, and carbazole.