Some polar ionic pesticides and their associated metabolites are not “amenable” to common multi residue methods, such as QuEChERS. These compounds need alternative extraction conditions for improved recovery and/or alternative separation conditions for improved retention and/or peak shape. Currently the polar pesticides tend to be treated as a series of selective single residue methods adding significant cost to the analysis and therefore, are often excluded from pesticide monitoring programs. At Fera we have coupled the QuPPe generic extraction conditions with determination by suppressed ion chromatography tandem quadrupole mass spectrometry. This presentation will describe our experiences and challenge faced in implementing this method, presenting validation data in a cereals matrix. View the presentation here.
Plagued by false or inaccurate results during pesticide analysis? To get to the bottom of the issue, it’s important to find any weaknesses in your pesticide residue workflow. In a recent blog on Analyte Guru, Richard Fussell of Thermo Scientific discusses areas in which pesticide testing labs can identify the weak links, including:
- Solvent extraction. QuEChERs (Quick, Easy, Cheap, Effective, Rugged and Safe) acetonitrile extraction method
- Sample processing
- Extraction efficiency
Get the details about how to find the weakest link in Fussell’s blog here.
More on pesticide analysis:
- New technology a step forward for pesticide analysis
- Need a faster sample prep method for pesticide residue analysis? Try accelerated solvent extraction