Analysis of ATP-Related Compounds, Histamine and Amino Acids

Importance of the Topic

Determination of adenosine triphosphate (ATP) and its degradation products is critical in fields ranging from biochemistry and clinical diagnostics to food quality control and pharmaceutical research. Accurate profiling of ATP-related metabolites provides insight into cellular energy status, spoilage processes in food, and enzymatic activities in complex matrices.

Objectives and Study Overview

This application note examines a reversed-phase liquid chromatography method using a Shim-pack GIST C18-AQ column to separate and quantify six ATP-related compounds: hypoxanthine, inosine 5′-monophosphate, inosine, adenosine 5′-monophosphate, adenosine 5′-diphosphate, and adenosine 5′-triphosphate. The study aims to demonstrate rapid, reproducible separation suitable for routine laboratory use.

Methodology and Instrumentation

Instrument and Conditions:

• System: Nexera dual injection UHPLC
• Column: Shim-pack GIST C18-AQ, 100 mm × 3.0 mm I.D., 3 µm
• Mobile phase A: Water/Acetonitrile 100:1 (v/v) with 0.15 M phosphoric acid and 0.225 M triethylamine
• Mobile phase B: Water/Acetonitrile 80:20 (v/v) with 0.15 M phosphoric acid and 0.225 M triethylamine
• Gradient: 0% B (0–4 min) → 12% B (11.5 min) → 100% B (11.51–18.5 min) → 0% B (18.51–32 min)
• Flow rate: 0.8 mL/min
• Column temperature: 30 °C
• Injection volume: 10 µL
• Detection: Photodiode array at 260 nm

Key Results and Discussion

The optimized gradient achieved baseline separation of all six analytes within 12 minutes, with sharp peak shapes and minimal tailing. Hypoxanthine eluted earliest, followed by progressively more polar monophosphates and diphosphates, with ATP displaying the longest retention. Retention time precision was better than 0.5% RSD, and peak area repeatability was within 2% RSD in triplicate injections.

Benefits and Practical Applications of the Method

• High throughput: complete separation in under 15 minutes supports rapid screening.
• Robustness: stable retention and reproducibility facilitate routine QC.
• Sensitivity: UV detection at 260 nm provides adequate limits for millimolar to micromolar concentrations.
• Versatility: applicable to biological fluids, cell extracts, and fermentation broths.

Future Trends and Potential Applications

Integration with mass spectrometric detection could extend sensitivity into the nanomolar range and offer structural confirmation. Miniaturized UHPLC systems and multiplexed injection designs promise even greater throughput. Additionally, coupling with automated sample preparation and data analysis pipelines will enhance applicability in high-content screening and quality assurance environments.

Conclusion

The described reversed-phase UHPLC method on a Shim-pack GIST C18-AQ column delivers a rapid, reliable, and reproducible approach for quantifying key ATP-related metabolites. Its straightforward setup and robust performance make it suitable for diverse analytical laboratories focused on energy metabolism, food safety, and bioprocess monitoring.

References

1. Shimadzu Corporation. Application News L554A: Analysis of ATP-Related Compounds, Histamine and Amino Acids. First Edition December 2021.