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Amrinone and N-acetylamrinone assay in human plasma using solid-phase extraction and reversed-phase chromatography
1Bureau of Drug Research, Health Protection Branch, Ottawa, Ontario, Canada.
Journal of Pharmaceutical and Biomedical Analysis
|March 1, 1994
Summary
A new liquid chromatography method accurately measures amrinone and N-acetylamrinone in human plasma. This sensitive assay is crucial for pharmacokinetic studies, offering reliable drug concentration analysis.
Area of Science:
- Analytical Chemistry
- Pharmacokinetics
- Biomedical Science
Background:
- Amrinone is a critical cardiotonic agent.
- Monitoring amrinone and its metabolite N-acetylamrinone is essential for therapeutic efficacy and safety.
- Existing analytical methods may lack the required sensitivity or throughput for comprehensive pharmacokinetic studies.
Purpose of the Study:
- To develop and validate a simple, sensitive, and simultaneous liquid chromatographic assay for amrinone and N-acetylamrinone in human plasma.
- To establish a robust method suitable for application in human pharmacokinetic studies.
Main Methods:
- Solid-phase extraction (SPE) using Bond Elut C18 columns for sample preparation.
- Reversed-phase phenyl column chromatography with isocratic elution.
- UV detection for quantitation of both analytes.
Main Results:
- The assay demonstrated high sensitivity, quantifying concentrations from 0.075 to 10 µg/mL.
- Excellent precision with inter-day relative standard deviation (RSD) below 10%.
- High accuracy, with recovery exceeding 94% across the standard curve range.
Conclusions:
- A validated, sensitive, and robust liquid chromatographic assay for simultaneous amrinone and N-acetylamrinone quantitation in human plasma has been successfully developed.
- The assay is suitable for application in human pharmacokinetic studies, providing reliable data for drug monitoring and research.