Thermo QuEChERS solutions in all your favorite flavors

Importance of the Topic

The QuEChERS sample preparation technique has become a standard approach for the extraction and cleanup of trace contaminants in complex matrices. Its simplicity, cost-effectiveness and compatibility with GC-MS and LC-MS make it indispensable in food safety, environmental monitoring and forensic analysis.

Objectives and Study Overview

This application note aims to present the key features of Thermo Scientific QuEChERS kits, their workflow variations, and integration with advanced analytical platforms. It reviews the evolution of the QuEChERS methodology since its inception in 2003, and highlights tailored workflows for pesticide, veterinary drug and other residue analyses.

Methodology and Instrumentation

The QuEChERS protocol consists of four fundamental steps: sample homogenization, extraction with salt-induced phase separation, dispersive SPE cleanup, and instrumental analysis by GC-MS or LC-MS.

• Extraction salts: MgSO₄, NaCl or citrate buffers to remove water and adjust pH
• Cleanup sorbents: PSA, C18, GCB to remove fatty acids, non-polar interferents and pigments
• Kit formats: Original, AOAC and EN methods adapted to various sample types
• Instrumentation: Thermo Scientific Vanquish UHPLC, TSQ Quantis and Altis triple quadrupole MS, Orbitrap Exploris for high-resolution screening, TriPlus RSH SMART autosampler with μSPE cleanup

Main Results and Discussion

Thermo Scientific QuEChERS kits deliver reproducible recoveries across a wide range of analytes including pesticides, veterinary drugs, mycotoxins and environmental contaminants. The three method flavors (Original, AOAC, EN) allow optimization for base-sensitive compounds, pH buffering and minimization of matrix interferences. Integration with Pesticide Explorer and VetDrugs Explorer workflows demonstrates high throughput, regulatory compliance and low detection limits (e.g., 10 ng/g in baby food, 0.04 ng/g steroid hormones in milk).

Benefits and Practical Applications

• Streamlined sample preparation reduces hands-on time and error
• Pre-weighed kit components ensure consistency and reproducibility
• Compatibility with automated autosampler μSPE cleanup enhances throughput
• Validated workflows support multi-residue analysis in food safety, environmental testing and forensic labs

Future Trends and Opportunities

Advances in sorbent chemistry, miniaturized extraction formats and improved software automation will further increase throughput and reduce solvent use. Coupling with high-resolution mass spectrometry and AI-driven data processing can expand multi-residue screening to unknown contaminants and support real-time decision-making in quality control laboratories.

Conclusion

QuEChERS remains a versatile and robust sample preparation platform. Thermo Scientific’s preconfigured kits, combined with modern instrumentation and software, enable reliable, high-throughput analysis of trace residues across diverse matrices, meeting stringent regulatory requirements.

Reference

• Anastassiades et al. J. AOAC Int. 2003;86(2):412–431.
• AOAC Official Method 2007.01.
• EN 15662:2018 standard for pesticides multi-residue analysis.