Analysis of Nucleotides Using Core Enhanced Technology Accucore HPLC Columns

Significance of the Topic

Nucleotides play critical roles in biological processes including genetic information transfer and energy metabolism. Rapid and reliable quantification of nucleotide levels is essential across research, food analysis, clinical diagnostics and drug development. The ability to separate and measure key nucleotides such as ATP, ADP, AMP, GDP and CMP in complex matrices supports enzyme activity assays, nutritional assessments and metabolic profiling.

Objectives and Study Overview

This application note outlines the development of a fast, isocratic HPLC method for five nucleotides using a Thermo Scientific Accucore aQ superficially porous column. The study aims to demonstrate separation efficiency, reproducibility and compatibility with 100% aqueous mobile phases on conventional HPLC instrumentation.

Methodology and Instrumentation

• HPLC System: Thermo Scientific conventional HPLC configured with an Accucore aQ column (2.6 µm, 100 × 2.1 mm).
• Mobile Phase: 50 mM potassium phosphate buffer at pH 6 in 100% aqueous composition, flow rate 0.7 mL/min.
• Column Temperature: 30 °C; Injection Volume: 2.0 µL; Detection: UV at 260 nm.
• Pressure: Average 137 bar, enabling use on standard HPLC systems.
• Sample Preparation: Primary standards of CMP, GDP, AMP, ADP and ATP at 5 mg/mL in water; mixed working standard prepared by combining aliquots and diluting to 1 mL.

Key Results and Discussion

The method achieved baseline separation of five nucleotides in under five minutes. Retention times ranged from 1.79 min (CMP) to 3.70 min (AMP). Across six replicate injections, retention time RSD was below 0.1% and peak area RSD below 1.7%, demonstrating excellent method precision. Peak asymmetry values remained close to unity, indicating sharp, symmetrical peaks. The column maintained performance using a fully aqueous mobile phase without loss of efficiency.

Benefits and Practical Applications of the Method

• Rapid analysis enables high sample throughput in research and quality control laboratories.
• Low backpressure operation on conventional HPLC expands accessibility without specialized UHPLC equipment.
• Robust performance in 100% aqueous mobile phase simplifies sample preparation and reduces solvent costs.
• High reproducibility supports reliable monitoring of nucleotide levels in biological and food samples.

Future Trends and Potential Applications

Advances in superficially porous materials and phase chemistries may further reduce runtimes and enhance separations of polar analytes. Integration with mass spectrometry detection could enable more detailed metabolomic profiling. Automation of sample preparation and data processing will continue to streamline workflows in clinical diagnostics and industrial analytics.

Conclusion

The Accucore aQ column demonstrates a fast, efficient and reproducible method for the isocratic separation of key nucleotides under fully aqueous conditions. The approach is well suited for routine analysis on standard HPLC systems, offering robust performance and significant time savings.

Reference

Freeke J. Analysis of Nucleotides Using Core Enhanced Technology Accucore HPLC Columns. Thermo Fisher Scientific Application Note ANCCSCETNUCLEOT, 2011.