Fast and Flexible Automated Sample extraction of PCDD/Fs and PCBs with X-TRACTION

Significance of the topic

Persistent organic pollutant analysis including dioxins and polychlorinated biphenyls is essential for monitoring environmental contamination and ensuring food and feed safety under international conventions and regulations

Objectives and overview

This study evaluates the performance of the x traction low pressure fluid extraction system for automated extraction of p cdd f and pcb in feed food and environmental matrices and compares its efficiency precision and accuracy to classical soxhlet methods

Methodology

Extraction was performed using low pressure fluid extraction at up to seventeen bar and elevated temperature in three cycles per sample Samples were prepared with a drying agent to ensure free flowing matrix Post extraction clean up was carried out on acidic silica gel alumina and carbon columns Concentrates were evaporated under controlled conditions and final analysis was conducted by high resolution gas chromatography mass spectrometry using split splitless and programmable temperature vaporizing injectors

Instrumentation

• x traction system for pressurized fluid extraction with magnetic locking extraction cells
• dextech cleanup instrument with acidic silica alumina and carbon columns
• d eva evaporation system with precise temperature control and centrifugal vials
• dfs hrms gc ms for high sensitivity detection of cdd f and pcb congeners

Main results and discussion

• feed samples showed comparable yield to soxhlet extraction with deviation below ten percent and rsd below six percent and extraction time reduced to forty five minutes
• food matrices fat extraction achieved accuracy within seven percent deviation of assigned values and rsd below seven percent cdd f and pcb toxic equivalency results matched proficiency test homogeneity values
• environmental certified reference materials for harbor sediment and sewage sludge delivered recoveries between seventy four and one hundred thirty one percent demonstrating robust performance

Benefits and practical applications

The x traction system reduces solvent consumption and extraction time while providing high throughput modular sample processing and eliminating cross contamination for routine monitoring in laboratories operating under strict regulatory requirements

Future trends and potential applications

• extension to additional persistent organic pollutants such as p bdes p cns and p fos
• integration with comprehensive two dimensional chromatography and mass spectrometry techniques for enhanced separation
• implementation of software driven automation and ai guided method optimization for quality assurance
• development of portable extraction and screening workflows for field applications

Conclusion

The x traction low pressure fluid extraction platform offers a fast flexible and reliable alternative to classical soxhlet for extraction of dioxins and pcb from diverse matrices delivering high precision accuracy and reduced operational costs

Reference

• Bernsmann T Albrecht M Furst P 2016 Organohalogen Compounds 78 797 799
• Calaprice C Calvano CD Zambonin C Focant JF 2015 Organohalogen Compounds 77 733 735
• Bernsmann T Albrecht M Furst P 2014 Organohalogen Compounds 76 1281 1284