Sulfonamide Antibiotics on a Thermo Scientific™ Acclaim™ 120 C18 RSLC Column

Significance of Sulfonamide Analysis

Sulfonamide antibiotics are widely used in human and veterinary medicine, but their residues pose risks to human health and the environment. Sensitive and rapid analytical methods are essential for regulatory compliance, food safety monitoring, and pharmaceutical quality control.

Objectives and Study Overview

This study evaluates the performance of a Thermo Scientific Acclaim 120 C18 RSLC column for the fast and effective separation of eight common sulfonamides. The goal is to reduce analysis time while maintaining sufficient resolution for reliable quantification.

Methodology

A gradient elution was applied using mobile phase A (30 mM acetic acid, pH 4.2) and mobile phase B (methanol). The gradient program held 88% A from 0 to 0.4 minutes, decreased to 60% over the next 1.8 minutes, and maintained that composition until 3.1 minutes. Flow rate was 0.75 mL/min, column temperature 35 °C, and injection volume 15 µL.

Instrumentation

• Column: Thermo Scientific Acclaim 120 C18 RSLC, 2.1 × 100 mm, 2.2 µm particle size
• System: Thermo Scientific Dionex UltiMate 3000 RS
• Detector: UV absorbance at 265 nm

Main Findings and Discussion

All eight sulfonamide standards (1.0 µg/mL) were baseline separated within 3.1 minutes under the optimized gradient. Sharp peak shapes, consistent retention times, and resolution factors exceeded typical analytical requirements. The approach boosts throughput without compromising data quality.

Applications and Practical Benefits

The rapid RSLC method is well suited for high-throughput screening of sulfonamide residues in food products, environmental water samples, and pharmaceutical formulations. Reduced run times lower solvent use and instrument occupancy, improving lab efficiency and cost-effectiveness.

Future Trends and Applications

Emerging directions include coupling RSLC to mass spectrometry for enhanced selectivity and sensitivity, further miniaturization of columns to reduce sample and solvent volumes, and integration with automated sample preparation workflows to address growing analytical demands.

Conclusion

The Thermo Scientific Acclaim 120 C18 RSLC column delivers rapid, reliable separations of multiple sulfonamide antibiotics in under four minutes. This balance of speed and resolution supports regulatory compliance, routine quality control, and high-throughput screening across diverse analytical settings.

References

Thermo Fisher Scientific Inc. Application Note 25642 (2009) Sulfonamide Antibiotics on a Thermo Scientific Acclaim 120 C18 RSLC Column.