Evaluation of different column chemistries for fast urinary metabolic profiling

Area of Science:

• Analytical Chemistry
• Metabolomics
• Biochemistry

Background:

• Metabolic profiling requires fast and efficient analytical methods.
• Liquid chromatography-mass spectrometry (LC-MS) is a key technique for analyzing biological samples like urine.
• Optimizing column chemistry is crucial for enhancing the speed and accuracy of LC-MS metabolic profiling.

Purpose of the Study:

• To evaluate different column chemistries and mobile phases for fast LC-MS urinary metabolic profiling.
• To compare the performance of hydrophilic interaction liquid chromatography (HILIC) and reversed-phase liquid chromatography (RPLC) columns.
• To identify the most suitable column for comprehensive and rapid analysis of urinary metabolites.

Main Methods:

• Investigated three porous HILIC materials and core-shell C18, XB-C18, and PFP-RPLC materials.
• Performed non-targeted profiling with pooled urine samples and targeted analysis of 54 common urinary metabolites.
• Utilized a peak scoring algorithm considering retention time, dead time, peak height, and peak shape for performance evaluation.

Main Results:

• HILIC columns generally provide better retention for polar metabolites.
• The diol-HILIC column outperformed RPLC columns in urinary metabolic profiling.
• Comprehensive metabolic profiling was achieved, revealing gender-specific differences in a small sample set.
• All tested column chemistries achieved adequate peak capacity within short gradient times.

Conclusions:

• The diol-HILIC column is highly effective for fast LC-MS urinary metabolic profiling, particularly for polar compounds.
• A combination of different column chemistries can provide comprehensive metabolic coverage.
• Fast LC-MS methods with optimized columns are suitable for large-scale metabolic profiling and biomarker discovery.