Figure 5-21. Separation of leucine enkephalin, gly-tyr, val-tyr-val, and oxytocin on plates consisting of poly(glycidyl methacrylate-ethylene dimethacrylate) monolith (A), poly(glycidyl methacrylate-ethylene dimethacrylate) monolith with hydrolyzed epoxy groups (B), monolithic layer with poly(lauryl methacrylate) homogeneously photografted on the entire surface (C), and monolithic layer with hydrophilized surface photografted with a diagonal gradient of poly(lauryl methacrylate) (D) using mobile phase 0.1% trifluoroacetic acid in 30% acetonitrile-water in the first dimension and 0.1% trifluoroacetic acid in 50% methanol-water in the second dimension.

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