Chromatographic material having the general formula S-B-X-Y-L where S is a solid support, B is a binding group, X is a substantially non-ionic hydrophilic organic spacer, Y is a coupling group and L is an affinity ligand. The chromatographic material is substantially free of non-specific adsorption and...http://www.google.com.hk/patents/US5240602?utm_source=gb-gplus-share專利 US5240602 - Chromatographic material
