Famotidine and Related Substances on a Thermo Scientific™ Acclaim™ 120 C18 Column

Significance of the topic

Famotidine is commonly prescribed to manage acid reflux conditions. Its chemical instability leads to the formation of multiple degradation products, making reliable analytical methods essential for ensuring drug safety, efficacy, and regulatory compliance.

Objectives and study overview

This study demonstrates an isocratic HPLC method using a Thermo Scientific Acclaim 120 C18 column to separate famotidine from its related impurities under pharmacopeial conditions.

Methods and instrumentation

Chromatographic conditions were optimized as follows:

• Stationary phase: Acclaim 120 C18, 5 μm, 4.6 × 150 mm
• Mobile phase composition: 7% acetonitrile and 93% aqueous 100 mM sodium acetate with 7.2 mM triethylamine adjusted to pH 6.0
• Flow rate: 1.4 mL/min
• Column temperature: 40 °C
• Injection volume: 50 μL
• Detection wavelength: 275 nm (UV)

Instrumentation used

• Pump: Dionex Summit P680A DGP
• Autosampler: ASI-100
• Column thermostat: TCC-100
• Detector: UVD-340U UV detector

Key results and discussion

The isocratic method achieved baseline resolution of famotidine and four impurities (A, B, C, and D) in a single run. Peak separation met acceptance criteria defined by the United States Pharmacopeia, demonstrating method robustness and reproducibility.

Benefits and practical applications

• Simple isocratic operation reduces run time and solvent usage
• High resolution supports accurate impurity profiling in quality control laboratories
• Compliance with USP guidelines ensures regulatory acceptance

Future trends and opportunities

Emerging column chemistries and novel mobile phase additives may further enhance resolution and reduce analysis time. Coupling this method with mass spectrometry and automated data processing could streamline impurity identification and quantification in pharmaceutical development and stability testing.

Conclusion

The Acclaim 120 C18 column provides an efficient, reproducible, and pharmacopeia-compliant approach for separating famotidine and its degradation products. Its straightforward isocratic protocol is well suited for routine analysis in pharmaceutical quality control.

References

• United States Pharmacopeia 29th Edition, page 883 (2006)