Analysis of Nivalenol and Deoxynivalenol

Significance of the Topic

Mycotoxins nivalenol and deoxynivalenol pose significant risks to food safety and human health. Reliable analytical methods are essential for monitoring contaminated grain products and ensuring regulatory compliance.

Objectives and Study Overview

This study presents a rapid reversed-phase HPLC procedure for simultaneous determination of nivalenol and deoxynivalenol. The goal is to achieve clear separation in under 20 minutes using a Shimadzu Shim-pack GIS C18 column.

Methodology

The method utilizes a binary solvent system with mobile phase A composed of water, acetonitrile and methanol in a 90/5/5 ratio and mobile phase B of acetonitrile and methanol in equal proportions. The gradient holds B at 0% for the first 20 minutes, increases to 50% between 20.01 and 25 minutes, then returns to 0% by 25.01 minutes, with a total run time of 45 minutes. Operating conditions include a flow rate of 1.0 ml/min, column temperature of 40 °C, injection volume of 10 μl, and UV detection at 220 nm with a cell temperature of 45 °C.

Used Instrumentation

• HPLC system Prominence-i
• Shim-pack GIS C18 column, 250 mm × 4.6 mm I.D., 5 μm
• UV detector set at 220 nm

Key Results and Discussion

Baseline separation of nivalenol and deoxynivalenol was achieved within 20 minutes, demonstrating well resolved peaks and consistent retention times. The chromatographic profile showed reproducible peak shapes and retention behavior, confirming method robustness.

Benefits and Practical Applications

This HPLC method offers high selectivity and sensitivity for trichothecene mycotoxins, making it suitable for high-throughput analysis in quality control and research laboratories.

• Efficient separation under isocratic conditions
• Short analysis time compatible with routine screening
• Robust performance with minimal method development

Future Trends and Potential Applications

Further developments may include coupling with high-resolution mass spectrometry for enhanced detection limits and selectivity. Automated sample preparation techniques and ultra-high-performance LC could reduce analysis time and expand the method to multiresidue mycotoxin profiling.

Conclusion

The described reversed-phase HPLC approach using the Shim-pack GIS C18 column provides a rapid, reliable, and reproducible solution for quantifying nivalenol and deoxynivalenol in cereals, supporting food safety monitoring efforts.