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Three simultaneous dissolution profiles on a solid pharmaceutical formulation by a FIA manifold provided with a
E Vranic1, M Catalá Icardo, J Martínez Calatayud
1Department of Analytical Chemistry, University of Valencia, Moliner 50, 46100 Burjassot, Valencia, Spain.
Journal of Pharmaceutical and Biomedical Analysis
|December 6, 2003
Summary
This study presents a new method for simultaneously determining dissolution profiles of multiple drugs in a single pharmaceutical formulation using Flow Injection Analysis (FIA). The approach accurately quanties individual drug dissolution rates and the overall formulation profile, even with overlapping spectra.
Area of Science:
- Pharmaceutical analysis
- Analytical chemistry
- Drug dissolution testing
Background:
- Simultaneous dissolution profiling of multiple active principles in a single formulation presents analytical challenges, particularly when spectral data overlap.
- Existing pharmacopoeial methods may not be optimized for simultaneous analysis of multiple components with overlapping spectra.
Purpose of the Study:
- To develop and validate a Flow Injection Analysis (FIA) methodology for the simultaneous determination of three dissolution profiles within one pharmaceutical formulation.
- To adapt official pharmacopoeial procedures for FIA to obtain both a global dissolution profile and individual profiles for two active principles with overlapping UV-vis spectra.
Main Methods:
- Adaptation of official pharmacopoeial dissolution procedures to FIA methodology.
- Utilizing derivative spectroscopy and zero-crossing mathematical procedures for the simultaneous determination of individual drug profiles.
- Obtaining the global dissolution profile from the zero-order derivative.
- Regression analysis using the three-parameter Higuchi equation for empirical profile adjustment.
Main Results:
- Successful simultaneous determination of three dissolution profiles (one global, two individual) was achieved.
- The derivative spectra and zero-crossing method effectively resolved overlapped UV-vis spectra for individual active principles.
- The Higuchi equation provided a suitable model for adjusting empirical dissolution profiles.
- Analytical errors associated with varying drug concentrations were evaluated.
Conclusions:
- The developed FIA method, incorporating derivative spectroscopy and zero-crossing analysis, enables accurate simultaneous dissolution profiling of multi-component pharmaceutical formulations.
- This methodology offers a robust alternative for characterizing complex drug release kinetics, even in the presence of spectral interferences.