Amiloride: biological fluid analysis by reverse-phase HPLC

Area of Science:

• Pharmacology
• Analytical Chemistry
• Clinical Chemistry

Background:

• Amiloride, an anti-diuretic, has limited pharmacokinetic data due to insensitive analytical methods.
• Accurate quantification of amiloride is crucial for understanding its clinical use and efficacy.

Purpose of the Study:

• To develop and validate a sensitive, rapid, and reproducible analytical method for quantifying amiloride.
• To enable robust pharmacokinetic studies of amiloride in human serum and urine.

Main Methods:

• Reverse-phase High-Performance Liquid Chromatography (HPLC) with fluorescence detection.
• Sample preparation involving silica cartridge adsorption and perchloric acid elution.
• Analysis using a C-18 column with a methanol:sodium perchlorate mobile phase.

Main Results:

• Achieved a sensitive detection limit of 1 ng/ml for amiloride.
• Demonstrated method reproducibility and applicability to human serum and urine.
• Successfully resolved amiloride from endogenous interfering substances.

Conclusions:

• The developed HPLC method provides a sensitive and reliable tool for amiloride quantification.
• This technique facilitates improved pharmacokinetic analysis, supporting clinical applications of amiloride.
• The method is suitable for routine analysis in clinical and research settings.