Ion exchange porous resins for solid phase extraction and chromatography

A solid phase extraction cartridge comprising a porous resin packed inside an open-ended container, said porous resin comprising at least one ion-exchange functional group, at least on hydrophilic polar component and at least on hydrophobic component, wherein said porous resin is a compound of formula 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, CH2CI, CH2NH2,
• CH2N[(CH2)yCH3]2 wherein y is any integer from 0 to 18, CH2N+[(CH2)y′CH3]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.