Bifunctional crown ether-based cation-exchange stationary phase for liquid chromatography
First Claim
1. A bifunctional cation-exchange composition for use in cation-exchange chromatography comprising:
- (a) synthetic resin support particles;
(b) crown ether functional groups attached to said synthetic resin support particles, wherein said crown ether functional groups are capable of forming complexes with at least one cation present in an eluent in contact therewith, thereby delaying the elution of said at least one cation from said bifunctional cation-exchange composition, and(c) non-crown ether cation-exchange functional groups attached to said synthetic resin support particles, wherein said non-crown ether cation-exchange functional groups are capable of interacting with cations present in said eluent.
1 Assignment
0 Petitions
Accused Products
Abstract
In accordance with the present invention, an improved bifunctional cation-exchange composition has been formed which comprises synthetic resin support particles and both crown ether and non-crown ether functional groups attached thereto. The compositions of the present invention provide for novel, enhanced cation separation capabilities and, depending upon the type of functional groups employed, permit effective separation of cations which elute at approximately the same time off standard and commonly used cation-exchange columns. The presently described bifunctional cation-exchange compositions also permit the effective separation of one cation from a mixture comprising another cation that is present at a significantly greater concentration. Formed articles and methods employing the bifunctional cation-exchange composition are also provided.
37 Citations
21 Claims
-
1. A bifunctional cation-exchange composition for use in cation-exchange chromatography comprising:
-
(a) synthetic resin support particles; (b) crown ether functional groups attached to said synthetic resin support particles, wherein said crown ether functional groups are capable of forming complexes with at least one cation present in an eluent in contact therewith, thereby delaying the elution of said at least one cation from said bifunctional cation-exchange composition, and (c) non-crown ether cation-exchange functional groups attached to said synthetic resin support particles, wherein said non-crown ether cation-exchange functional groups are capable of interacting with cations present in said eluent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification