Liquid-chromatographic analysis for urinary porphyrins

Area of Science:

• Analytical Chemistry
• Biochemistry
• Clinical Diagnostics

Background:

• Porphyrins are crucial biomarkers for various metabolic disorders.
• Accurate and efficient separation of urinary porphyrins is essential for diagnosis.
• Existing methods may be time-consuming or require complex sample preparation.

Purpose of the Study:

• To develop a fast and reliable chromatographic method for urinary porphyrin analysis.
• To separate porphyrins based on their carboxyl group number.
• To enable fluorometric quantification of separated porphyrins.

Main Methods:

• Utilized a mu-Bondapak C18 stationary phase with a methanol/aqueous sodium phosphate mobile phase.
• Employed a linear gradient elution system at pH 3.5.
• Sample preparation involved pH adjustment and centrifugation, followed by fluorometric detection.

Main Results:

• Successfully separated urinary porphyrins according to the number of carboxyl groups.
• Non-porphyrin fluorescent substances eluted prior to porphyrins.
• Chromatography and system re-equilibration completed within approximately 35 minutes.

Conclusions:

• The developed method offers a simple and efficient approach for urinary porphyrin separation.
• This technique facilitates rapid fluorometric analysis of porphyrins.
• The method holds potential for improved clinical diagnostics related to porphyrin metabolism.