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[Spectroscopic study on procaine hydrochloride and its cyclodextrins inclusion complexes]
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|April 12, 2005
Summary
This study identified two forms of procaine (molecular and ion) and their specific pH ranges. Their fluorescence varied with different cyclodextrin compounds, impacting drug interactions.
Area of Science:
- Analytical Chemistry
- Physical Chemistry
- Pharmaceutical Sciences
Context:
- Procaine, a local anesthetic, exhibits different forms based on pH.
- Understanding these forms is crucial for drug formulation and delivery.
- Cyclodextrins are often used to modify drug properties.
Purpose:
- To identify and characterize the molecular and ionic forms of procaine using ultraviolet spectroscopy.
- To determine the pH values at which these two forms exist.
- To investigate the effect of various cyclodextrins (beta-CD, HP-beta-CD, Methyl-beta-CD) on procaine's fluorescence intensity.
Summary:
- Ultraviolet spectroscopy revealed two distinct types of procaine: molecular and ionic.
- The specific pH values for each procaine type were determined.
- Fluorescence intensity variations were observed for both procaine types when interacting with beta-cyclodextrin, hydroxypropyl-beta-cyclodextrin, and methyl-beta-cyclodextrin.
Impact:
- Provides fundamental insights into procaine's behavior in solution.
- Informs the development of improved procaine formulations with enhanced stability or delivery.
- Highlights the potential of cyclodextrins for modulating procaine's physicochemical properties.