A series of novel L-valine tert-butylamide bonded phases with different spacers was prepared for use in high-performance liquid chromatog. for the resoln. of derivatives fo some racemic a-aminoalkylphosphonic acids, a-amino acids, dipeptides, and ferrocenyl alanine. Generally, the more rigid the spacers in the phases, the smaller the separation factor. The phase with asym. carbon atoms in spacer shows slightly improved separation for some of the racemic compounds, but the racemic compounds separated on this phase are limited.

Key words: AMINO ACID, PHOSPHONIC ACID P, HIGH SPEED LIQUID CHROMATOGRAPHY, STATIONARY PHASE, ISOMER, VALINE, MESOTOMY, CHIRALITY, DIPEPTIDE, BUTANAMIDE P