| 摘要 |
The surfaces of porous silicon dioxide chromatographic adsorption means are altered by chemical reaction of silanol groups with primary or secondary aliphatic or araliphatic amines having at least two carbon atoms and containing no functional groups as substituents that might competitively react with respect to the amino groups. The amines are preferably substituted in the omega-position with at least one non-competitive functional group. Such terminal functional groups may subsequently be reacted with compounds which further alter the surface to provide optimal surface groups in the stationary phase for given separation and chromatographic problems. |
