Glycolic and Related Acids on a Thermo Scientific™ Acclaim™ Organic Acid (OA) Column

Significance of the Topic

Hydrophilic organic acids such as glycolic, formic, lactic and acetic acids play critical roles in pharmaceuticals, food quality control and environmental monitoring. Reliable quantification of these low-molecular-weight acids requires chromatographic methods that deliver high resolution, reproducibility and throughput.

Objectives and Study Overview

This application note demonstrates the separation and detection of four common organic acids using a Thermo Scientific™ Acclaim™ Organic Acid (OA) column under reversed-phase conditions. The primary goals are to achieve baseline separation, assess run-to-run consistency and outline a straightforward workflow for routine analysis.

Methodology and Instrumentation

The separation was performed on an Acclaim OA column (5 µm, 4.6 × 250 mm) maintained at 30 °C. A Thermo Scientific™ Dionex™ Summit P680A pump delivered the mobile phase at 0.70 mL/min, consisting of 100 mM Na2SO4 and 4.5 mM H3PO4 adjusted to pH 2.9. Samples (20 µL) were introduced via an ASI-100 autosampler, and detection was carried out at 210 nm using a UVD 340U UV detector. Standards were prepared at 100 µg/mL in water.

Main Results and Discussion

The method achieved clear baseline separation of glycolic, formic, lactic and acetic acids within 8 minutes. Chromatographic peaks exhibited sharp profiles and consistent retention times, indicating robust column performance. The acidic mobile phase suppressed ionization of analytes, enhancing retention and peak shape under reversed-phase conditions.

Benefits and Practical Applications

• Rapid analysis with total run time under 10 minutes supports high sample throughput.
• Simple mobile phase preparation enhances day-to-day reproducibility.
• Method adaptability allows integration into QA/QC workflows in pharmaceutical, food and environmental laboratories.

Future Trends and Opportunities

Ongoing developments in column chemistries and detector sensitivity may further reduce analysis time and detection limits. Coupling this method with mass spectrometry could expand its applicability to trace-level monitoring and complex matrices. Automated sample preparation and data processing tools will enhance workflow efficiency in high-throughput environments.

Conclusion

This study confirms that the Thermo Scientific Acclaim OA column under simple reversed-phase conditions offers a fast, reproducible and robust solution for separating key hydrophilic acids. The method’s ease of use and reliable performance make it well suited for routine analytical tasks across multiple industries.

Instrumentation Used

• Column: Thermo Scientific Acclaim OA, 5 µm, 4.6 × 250 mm
• Pump: Thermo Scientific Dionex Summit P680A DGP
• Autosampler: ASI-100, injection volume 20 µL
• Detector: UVD 340U at 210 nm
• Column Compartment: TCC-100 at 30 °C
• Mobile Phase: 100 mM Na₂SO₄ + 4.5 mM H₃PO₄, pH 2.9

Reference

Thermo Fisher Scientific Inc. Application Note: Separation of Glycolic and Related Acids on an Acclaim OA Column, 2009.