کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
232288 | 1427479 | 2006 | 9 صفحه PDF | دانلود رایگان |
In the pharmaceutical area, fine particles with a narrow particle size distribution are required to obtain a high surface area. In addition, particle size is one of the critical factors for the determination of appropriate routes of drug administration. In this work, we have used dense-gas anti-solvent crystallization techniques for the straightforward production of micron-sized powders of the chitosan derivatives d-Glucosamine Hydrochloride and d-Glucosamine Sulphate salts, which have increasing interest at present in medicinal research. The use of these crystallization methods permit to avoid the problematic communition and homogenization down-stream processes steps required after conventional crystallization methods. Semi-continuous ASES and batch GAS procedures, which are the two extremes of dense gas anti-solvent precipitation techniques, were successfully used for the micronization of these salts, and the results obtained with both procedures are compared and analysed.
Journal: The Journal of Supercritical Fluids - Volume 38, Issue 1, August 2006, Pages 94–102