Synthesis and Characterization of Chemically Cross-Linked Acrylic Acid/Gelatin Hydrogels: Effect of pH and Composition on Swelling and Drug Release

Figure 8

Cumulative % release of pheniramine maleate from AA/Gelatin hydrogels after 12 h using different concentrations of EGDMA as cross-linking agent (0.65%, 0.75%, and 0.85%) at various pH values in 0.05 M USP phosphate buffer solutions.