Amylose tris(3,5-dimethylphenylcarbamate) (ADMPC) and tris(3,5-dichlorophenylcarbamate) (ADCPC) were supported on macroporous silica gel to use as chiral stationary phases for HPLC. ADMPC showed higher optical resolving power for some enantiomeric pairs than cellulose tris(3,5-dimethylphenylcarbamate), and gave a practically useful chiral HPLC column. ADCPC resolved a few racemic drugs efficiently.

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A variety of racemic carboxylic acids have been for the first time directly resolved by normal-phase, high-performance liquid chromatography using a hexane-2-propanol eluting system containing a small amount (≈1%) of a strong carboxylic acid, like formic acid, trichloroacetic acid, and trifluoroacetic acid.