Related Experiment Videos
Development and validation of capillary electrophoresis methods for pharmaceutical dissolution assays
S E Lucangioli1, V G Rodríguez, G C Fernández Otero
1Department of Analytical Chemistry and Physicochemistry, Faculty of Pharmacy and Biochemistry, University of Buenos Aires, Argentina.
Journal of Capillary Electrophoresis
|January 1, 1997
Summary
Solid-phase extraction coupled with capillary electrophoresis (CE) effectively determines drugs in dissolution tests. This method achieved high enrichment factors for accurate quantification of betamethasone and ergotamine tartrate.
Area of Science:
- Analytical Chemistry
- Pharmaceutical Analysis
Background:
- Dissolution testing is crucial for evaluating oral solid dosage forms.
- Accurate determination of active pharmaceutical ingredients (APIs) requires sensitive analytical methods.
- Traditional methods may lack the sensitivity for trace-level drug quantification.
Purpose of the Study:
- To develop and validate a capillary electrophoresis (CE) method for determining active compounds in dissolution tests.
- To enhance drug preconcentration using solid-phase extraction (SPE) disks.
- To quantify betamethasone and ergotamine tartrate in oral solid dosage forms.
Main Methods:
- Solid-phase extraction (SPE) disks were used for drug preconcentration.
- Capillary electrophoresis (CE) with UV detection at 254 nm was employed for separation.
- Optimized background electrolytes (BGEs) were used: 20-mM phosphate borate buffer (pH 9.0) with sodium cholate for betamethasone, and 25-mM phosphate buffer (pH 3.0) for ergotamine tartrate.
- Fused-silica capillaries of 35 or 60 cm length and 75 μm i.d. were utilized with 15 kV applied voltage.
Main Results:
- An enrichment factor of 20:1 was achieved.
- The method allowed determination of betamethasone at 0.33 μg/mL and ergotamine tartrate at 1.0 μg/mL.
- Method validation demonstrated comparable accuracy and precision to High-Performance Liquid Chromatography (HPLC).
Conclusions:
- SPE-CE is a sensitive and reliable technique for analyzing APIs in dissolution media.
- The developed method offers an efficient alternative to HPLC for pharmaceutical quality control.
- This approach facilitates accurate assessment of drug release from oral solid dosage forms.