Abstract: In this study, solution enhanced dispersion by supercritical fluids (SEDS) technique was applied for the preparation of 5-aminosalicylic acid (5-ASA) loaded Eudragit S100 (EU S100) nanoparticles. The effects of various process variables including pressure, temperature, 5-ASA concentration and solution flow rate on morphology, particle size, 5-ASA loading and entrapment efficiency of nanoparticles were investigated. Under the appropriate conditions, drug-loaded nanoparticles exhibited a spherical shape and small particle size with narrow particle size distribution. In addition, the nanoparticles prepared were characterized by X-ray diffraction, Differential scanning calorimetry and Fourier transform infrared spectroscopy analyses. The results showed that 5-ASA was imbedded into EU S100 in an amorphous state after SEDS processing and the SEDS process did not induce degradation of 5-ASA.
Keywords: supercritical antisolvent; solution enhanced dispersion by supercritical fluids; Eudragit S100; 5-ASA; nanoparticles; colon-specific
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Hu, D.; Liu, L.; Chen, W.; Li, S.; Zhao, Y. A Novel Preparation Method for 5-Aminosalicylic Acid Loaded Eudragit S100 Nanoparticles. Int. J. Mol. Sci. 2012, 13, 6454-6468.
Hu D, Liu L, Chen W, Li S, Zhao Y. A Novel Preparation Method for 5-Aminosalicylic Acid Loaded Eudragit S100 Nanoparticles. International Journal of Molecular Sciences. 2012; 13(5):6454-6468.
Hu, Daode; Liu, Liang; Chen, Wenjuan; Li, Sining; Zhao, Yaping. 2012. "A Novel Preparation Method for 5-Aminosalicylic Acid Loaded Eudragit S100 Nanoparticles." Int. J. Mol. Sci. 13, no. 5: 6454-6468.