Ion exchange porous resins for solid phase extraction and chromatography

A porous resin for solid phase extraction or chromatography, wherein said porous resin is a compound of formula I:

• -(A)n-(B)m—(C)p— (I)
• and salts thereof,
• wherein the order of A, B and C may be random, block, or a combination of random and block;
• wherein
• 1
• 100
• <
• (
• p
• +
• n
• )
• m
• <
• 100
• 1
• and
• 1
• 500
• <
• p
• n
• <
• 100
• 1
• ;
• wherein A is selected from the group consisting of
• wherein B is selected from the group consisting of
• wherein C is A or modified A, wherein modified A is selected from the group consisting of
• and
• wherein X is selected from the group consisting of SO3H, CH2CO2H, CH2CH(CO2H)2, CO2H, PO3H2, PO2H2, CH2PO3H2, CH2Cl, CH2NH2,
• CH2N[(CH2)yCH3]2 wherein y is any integer from 0 to 18, CH2N+[(CH2)yCH3]3D− wherein y′ is any integer from 0 to 18 and D− is an anion, SO2NHR wherein R is polyethylenimine, and CH2NHR wherein R is polyethylenimine;
• and wherein X is present at a concentration of about 0.6 to about 3.2 milliequivalents per gram of resin.