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Investigation of a liquid–liquid extraction system based on non-ionic surfactant–salt–H2O and mechanism of drug extraction
Abstract
Based on the investigation of a non-ionic surfactant–salt–H2O liquid–liquid extraction system, general rules concerning
salt selection are concluded and the mechanism of phase separation is explained. The extraction behavior of chlorpromazine
hydrochloride (CPZ) and procaine hydrochloride (PCN) in such a system is studied. Research shows that the extraction
efficiency of CPZ can amount to 96% by twice extraction, which means that quantitative extraction is realized, while that of
PCN is 77%. This system produces distribution coefficients (KD) of 12.3 and 2.6, respectively, for CPZ and PCN. Extraction
mechanism is deduced according to ultraviolet absorbance; and molecular fluorescence spectra change of the drugs in the
system studied. © 2002 Elsevier Science B.V. All rights reserved.
Keywords: Non-ionic surfactant–salt–H2O extraction system; Polyethylene glycol-1000; Chlorpromazine hydrochloride; Procaine
hydrochloride; Mechanism of extraction无忧论文 【http://www.uklunwen.com】 |
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