High-Speed Analysis of Itraconazole in Plasma Using Triple Quadrupole LC/MS/MS (LCMS-8050)

Significance of the Topic

Itraconazole is a widely used triazole antifungal for fungal infections in dermatology and systemic mycoses. Rapid quantification in plasma supports drug monitoring, pharmacokinetic studies, and therapeutic optimization. The development of high speed LC MS MS assays enhances throughput and data quality in clinical and research settings.

Objectives and Overview of the Article

This article demonstrates a streamlined protocol for quantifying itraconazole and its active metabolite hydroxy itraconazole in human plasma using the Shimadzu LCMS 8050 triple quadrupole mass spectrometer. Emphasis is placed on simple sample pretreatment, reliable calibration, and validation metrics suitable for bioanalytical applications.

Methodology and Instrumentation

Sample pretreatment relied on protein precipitation with acetonitrile containing deuterated internal standard itraconazole d3, followed by centrifugation and dilution in aqueous acetic acid. Chromatographic separation was performed in reversed phase mode on a Shim pack GIS column using ammonium acetate and acetonitrile gradient at 0.4 mL per minute. Electrospray ionization in positive mode and multiple reaction monitoring transitions were applied for selective quantification.

Used Instrumentation

• Shimadzu LCMS 8050 triple quadrupole mass spectrometer
• Shim pack GIS column 75 by 2.1 mm, 3 micron

Main Results and Discussion

Calibration curves for both compounds exhibited strong linearity with correlation coefficients greater or equal to 0.999 across 10 to 1000 ng per mL. Accuracy ranged between 93 and 107 percent for standards and 81 to 103 percent for quality controls. Precision expressed as relative standard deviation remained below 15 percent for calibration points and below 5 percent for QC samples, demonstrating assay robustness.

Benefits and Practical Applications

• High throughput analysis with a total runtime of 4.5 minutes per injection
• Minimal sample processing cost and time
• Suitable for pharmacokinetic profiling and therapeutic drug monitoring

Future Trends and Opportunities

Further integration of automation in sample pretreatment could accelerate workflow. Extending the method to other antifungals and metabolites may broaden clinical applications. Adoption in routine laboratories can support personalized dosing and safety evaluations.

Conclusion

The presented LC MS MS method enables fast, precise, and accurate quantification of itraconazole and hydroxy itraconazole in plasma. Its simple sample preparation and validated performance make it an attractive option for clinical and research bioanalysis.

Reference

Shimadzu Application News No C127 Edition June 2016.