Preparation and Characterization of Sodium Alginate/Chitosan Composite Nanoparticles Loaded with Chondroitin Sulfate

Figure 7

Relationship of the percent of cumulative release and time. (a) The weight ratio of SA and CS of 2 : 1 in the buffer solutions at a pH of 7.4; (b) the weight ratio of SA and CS of 5 : 1 in the buffer solutions at a pH of 7.4; (c) ghe weight ratio of SA and CS of 2 : 1 in the buffer solutions at a pH of 1.2.