Antioxidants in Edible Oils Using Accucore Polar Premium

Significance of the Topic

Antioxidants are essential in edible oils and fats to prevent rancidity and maintain product quality. Cetylpyridinium salts serve as mild antibacterial agents and preservatives in mouthwash, cough drops and other pharmaceutical formulations. Rapid and accurate analysis of these compounds ensures product safety and compliance with regulatory standards.

Objectives and Study Overview

The study aims to develop and compare chromatographic methods for the separation and quantification of cetylpyridinium and twelve common antioxidants in edible oil based products and mouthwash. Two column chemistries were evaluated: a conventional C18 surfactant plus column and a core shell polar premium column. The goal was to resolve coeluting matrix interferences and provide a robust method for quality control laboratories.

Methodology and Instrumentation

Sample Preparation

• Liquid liquid extraction following AOAC method 983.15 to isolate antioxidants and cetylpyridinium from oil and mouthwash matrices

Chromatographic Conditions

• System: Dionex ICS 3000 ion chromatography
• Columns evaluated
  • Thermo Scientific Acclaim Surfactant Plus C18, 3.0 by 150 millimeter, 3 micrometer
  • Thermo Scientific Accucore Polar Premium core shell, 3.0 by 100 millimeter, 2.6 micrometer
• Mobile phase A: acetonitrile water acetic acid blend at 50 50 0.5 v v v
• Mobile phase B: 100 millimolar formic acid in water
• Gradient elution program optimized for complete separation within 20 minutes
• Flow rate: 0.8 milliliter per minute at 30 degrees Celsius
• Injection volume: 2 to 5 microliter

Detection

• UV diode array scanning from 250 to 400 nanometers with monitoring at 220 and 280 nanometers
• Conductivity detection with suppressor set to a water flow of 5.5 milliliter per minute and current of 8 milliampere

Main Results and Discussion

The Acclaim Surfactant Plus C18 column provided good retention and peak shape for the target compounds but exhibited coelution of propyl gallate with an unknown matrix component. The Accucore Polar Premium core shell column delivered higher efficiency and distinct selectivity, effectively resolving propyl gallate and other antioxidants from interferences. All twelve antioxidants and cetylpyridinium were baseline separated within a short run time under the optimized gradient.

Benefits and Practical Applications

The developed method offers a fast reliable approach for routine quality control of antioxidants in edible oils butter and margarine as well as cetylpyridinium in mouthwash formulations. The core shell column reduces analysis time and enhances resolution against complex sample matrices ensuring accurate quantitation and regulatory compliance.

Future Trends and Potential Applications

Advances in column technology and coupling with mass spectrometry may further improve sensitivity and identify trace level compounds. Miniaturization of sample preparation and on line extraction techniques could streamline workflows in industrial and academic laboratories. Green solvent systems and high pressure operation represent additional opportunities to reduce analysis time and environmental impact.

Conclusion

An optimized ion chromatography method using a core shell polar premium column with conductivity and UV detection enables efficient separation of antioxidants and cetylpyridinium in complex matrices. This approach supports robust quality monitoring in food and pharmaceutical applications.

References

AOAC method 983.15 standard for antioxidant determination