Pesticide Standards - For Food & Environmental Analysis

Significance of the topic

The accurate analysis of pesticide residues in food, water, soil and feed is critical for public health, environmental protection and regulatory compliance. Certified reference materials and reliable extraction/cleanup methods enable laboratories to generate traceable, reproducible data that meet national and international standards for monitoring persistent organic pollutants, neonicotinoids and emerging contaminants.

Goals and study overview

This whitepaper introduces a comprehensive portfolio of pesticide standards, certified reference materials (CRMs) and analytical reagents designed to support ISO/IEC 17025-accredited laboratories. It outlines methods for sample preparation, cleanup, calibration and quality assurance in the analysis of a wide range of pesticide active ingredients and metabolites.

Methodology and Instrumentation

Sample preparation is based on the QuEChERS approach, combining acetonitrile extraction with dispersive SPE. Key features include:

• Use of isotopically labeled internal standards (13C, 15N, D) to correct for analyte loss,
• ENVI QuE SPE products and QuEChERS extraction tubes for robust sample cleanup,
• Z-Sep and Z-Sep+ sorbents to remove fats, phospholipids and sterols from high-fat matrices,
• Solid-phase microextraction (SPME) fibers for solvent-free extraction,
• GC–MS/MS and LC–MS/MS platforms with method-specified columns (e.g., SLB®-PAHms) for sensitive quantification.

Main results and discussion

Recovery studies for fipronil in egg samples spiked at 5 ng/g demonstrate:

• Average recovery of 94% with RSD of 8%, within acceptable validation ranges,
• Z-Sep+ cleanup reduced co-extracted fatty acids and matrix interferences,
• MRM detection ensured low-level quantification in compliance with EU maximum residue limits.

Broad product offerings include over 1 000 neat standards, more than 110 single-component solutions, and 120+ pesticide metabolites, all traceable to NIST SRMs or certified by quantitative NMR and gravimetric methods.

Benefits and practical applications of the method

These solutions enable laboratories to:

• Establish traceable calibration curves with full uncertainty budgets,
• Validate and control method performance using matrix CRMs spiked with target analytes,
• Participate in proficiency testing schemes to demonstrate method competency,
• Stay aligned with Basel/Rotterdam/Stockholm Conventions and regional regulations (EU, EPA, FAO/WHO).

Future trends and applications

Ongoing developments include expanding the isotopically labeled standards portfolio, introducing CRMs for cannabis pesticide analysis, and supporting global proficiency testing programs. Emerging needs for per- and polyfluorinated substances (PFAS) and new neonicotinoid metabolites will drive further method improvements and certified material releases.

Conclusion

This integrated suite of certified materials, extraction/cleanup tools and analytical reagents provides a turnkey solution for labs conducting routine and research-based pesticide residue analysis. It ensures data integrity, compliance with international norms and the flexibility to address evolving analytical challenges.

References

• Fipronil Egg Scandal: What We Know. BBC News (2017).
• WHO Recommended Classification of Pesticides by Hazard and Guidelines (2010).
• 6 Countries Warned of Eggs Contaminated with Pesticide Fipronil. CBS News (2017).