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Stability study of piroxicam and cinnoxicam in solid pharmaceuticals
R Ficarra1, A Villari, N Micali
1Dipartimento Farmaco-Chimico, Università di Messina, Facoltà di Farmacia, Italy. pficarra@pharma.unime.it
Journal of Pharmaceutical and Biomedical Analysis
|March 7, 2000
Summary
This study introduces a faster, more efficient method for determining the hydrolysis rate constants of cinnoxicam using non-isothermal kinetic analysis. This approach significantly reduces time and chemical waste in mechanistic studies.
Area of Science:
- Chemical Kinetics
- Analytical Chemistry
- Physical Chemistry
Background:
- Understanding the hydrolysis kinetics of pharmaceuticals like cinnoxicam is crucial for drug stability and formulation.
- Traditional kinetic studies often require significant time and resources.
- Advancements in data processing enable novel analytical approaches.
Purpose of the Study:
- To determine the pseudo-first order rate constant for cinnoxicam hydrolysis across various temperatures.
- To validate a generalized non-isothermal analysis method for kinetic studies.
- To assess the efficiency of this new method compared to traditional approaches.
Main Methods:
- Variable-temperature kinetic experiments were conducted.
- A spectrophotometric method was employed under non-isothermal conditions.
- Data analysis utilized a generalization of non-isothermal analysis.
Main Results:
- The pseudo-first order rate constant for cinnoxicam hydrolysis was successfully determined.
- Results from the non-isothermal method were identical to traditional constant-temperature runs.
- The novel method demonstrated an order of magnitude reduction in time and chemical usage.
Conclusions:
- The generalized non-isothermal analysis is a valid and efficient method for kinetic studies.
- This approach offers significant advantages in terms of speed and resource conservation for mechanistic studies.
- The findings pave the way for more streamlined pharmaceutical kinetic analysis.