Fully automated method implementation for compliant analysis of polychlorinated dibenzodioxins/furans by GC-MS/MS

Significance of the Topic

Polychlorinated dibenzodioxins and furans known as dioxins are persistent organic pollutants with high toxicity and bioaccumulation potential. Regulatory bodies such as the European Union have established stringent limits on dioxin levels in food and feed to protect public health. Reliable and efficient analytical workflows are essential for routine monitoring and compliance reporting.

Objectives and Study Overview

This work presents a fully automated method implementation for compliant analysis of polychlorinated dibenzodioxins and furans by GC MS MS. The aim is to streamline adoption of the EU performance based methodology for dioxin testing by leveraging a dedicated eWorkflow template in the Chromeleon Chromatography Data System, compatible with the Thermo Scientific TSQ 9610 triple quadrupole GC MS MS system.

Methodology and Instrumentation

Sample preparation combines extraction and cleanup steps followed by either splitless or programmable temperature vaporization injection. Chromatographic separation uses a predefined oven temperature program. Detection relies on triple quadrupole MS MS with selected precursor to product ion transitions. Quantitation is based on isotopic dilution allowing real time calculation within the data system. The eWorkflow includes predefined sequence templates for calibration standards, quality control samples, blanks, and unknowns, with adjustable spike levels for syringe and internal standards.

Results and Discussion

Interactive tables and charts within the data system provide real time feedback on internal standard recovery, observed versus theoretical ion ratios, and limits of quantification for each analyte. Sample results tables display lower middle and upper bound values for WHO PCDD F TEQ along with percent deviation between bounds. Visual alerts highlight ion ratios falling outside regulated tolerance and corrected peak integration updates results automatically, reducing manual review time and ensuring compliance.

Benefits and Practical Applications

• Rapid deployment of a validated compliant method without extensive method development effort
• Integrated isotopic dilution quantitation eliminates external calculations
• Customizable sequence and reporting templates adapt to laboratory needs
• Interactive QC tools accelerate data evaluation and decision making

Future Trends and Applications

Advances may include expansion of automated workflows to additional persistent organic pollutants and emerging contaminants integration of machine learning for peak detection and anomaly recognition and cloud based data sharing for collaborative compliance monitoring. Further developments could enhance remote operation and continuous monitoring capabilities.

Conclusion

The Chromeleon eWorkflow template for dioxin analysis on the TSQ 9610 GC MS MS platform offers a fully automated compliant solution that reduces time to implementation and improves data quality assurance. Its interactive tools and customizable templates support routine high throughput testing in food and feed laboratories.

References

• Commission Regulation EU 2017 644 Laying down methods of sampling and analysis for the control of levels of dioxins dioxin like PCBs and non dioxin like PCBs in certain foodstuffs
• Commission Regulation EU 2017 771 Amending Regulation EC 152 2009 as regards methods for determination of levels of dioxins and polychlorinated biphenyls