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Mar 15, 2007 - Bifenthrin. RSDr, %. 46. 12. 1. 0.012. RSDR, %. 33. 17. 11. Recovery,%. 125. 108. 94. Bitertanol. RSDr, %. 14. 24. 7. 0.006. RSDR, %. 22. 18.
CRL for Cereals and Feeding stuff National Food Institute Danish Technical University

Method validation report Determination of pesticides in cereals using the QuEChERS method and GC-ITD

Susan Strange Herrmann and Mette Erecius Poulsen March 15, 2007

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Appendix 6, Technical Report 2006

Contents 1. Introduction.....................................................................................................................................3 2. Principle of analysis........................................................................................................................3 3. Validation design.............................................................................................................................3 4. Calibration curves ...........................................................................................................................4 5. Precision - repeatability and reproducibility..................................................................................4 6. Accuracy - Recovery........................................................................................................................5 7. Criteria for the acceptance of validation results............................................................................5 8. Detection limit, LOD .......................................................................................................................5 9. Results..............................................................................................................................................6 10. Conclusion.....................................................................................................................................6 11. References .....................................................................................................................................6 Appendix 1 - Summary of statistical values….………………………………...…………………...9 Appendix 2 - Ions used for MS quantification……………………..………...…………...……….15 Appendix 3 - Chromatograms of rice and rye…………………………………………...…..…….19

National Food Institute, The Danish Technical University

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1. Introduction This report describes the validation of the QuEChERS method combined with GC-ITD for determination of pesticide residues in cereals. The QuEChERS method has an extraction and cleanup step, which has been developed to be Quick, Easy, Cheap, Efficient, Rugged and Safe. The method has already been validated on fruits and vegetables1, but the data available on cereals is limited. The method validated here was based on the procedure for dry matrixes (