Cationic amine-bridged periodic mesoporous organosilica materials for off-line solid-phase extraction of phenoxy acid herbicides from water samples prior to their simultaneous enantiomeric determination by capillary electrophoresis

1. Valimaña-Traverso, J.
2. Morante-Zarcero, S.
3. Pérez-Quintanilla, D.
4. García, M.Á.
5. Sierra, I.
6. Marina, M.L.