QuEChERS Validation Method for Acidic Pesticides - EURL ...

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Acidic pesticides – cleanup issue Example: Extract of red currant Losses of acidic components after cleanup Acidic compounds interact with PSA CRL-SRM CRL Workshop Valencia Spain 26. – 29. September 2007 12 mg/mL 10 8 6 4 2 0 Citrate-Buffered Sample pH 5.1 2,4 pH=3.5 pH=7.8 pH=8.3 1,0 Raw Extract PSA 25 mg/mL 0,5 PSA 50 mg/mL mg co-extractives/mL Extract pH Community Reference Laboratory for Pesticide Residues using Single Residue Methods 9 8 7 6 5 4 3 2 1 0 pH
Acidic pesticides – including into QuEChERS QuEChERS has to be modified, to include acidic pesticides CRL-SRM CRL Workshop Valencia Spain 26. – 29. September 2007 Avoid special cleanup procedures Special conditions during extraction and chromatography Community Reference Laboratory for Pesticide Residues using Single Residue Methods
Page 1 and 2: QuEChERS Validation Method for acid
Page 3 and 4: Acidic pesticides pH-issue: Ionizat
Page 5: Acidic pesticides - influence of pH
Page 9 and 10: Acidic pesticides - pesticide list
Page 11 and 12: Method Validation Experiment 2006 -
Page 13 and 14: Interlab. Method Validation Experim
Page 15 and 16: ILMV 2006 Acids - Results Cucumber
Page 17 and 18: ILMV 2006 Acids - Results Lemon Lem
Page 19 and 20: ILMV 2006 Acids - Results Raisins R
Page 21 and 22: ILMV 2006 Acids - Results Wheat Flo
Page 23 and 24: QuEChERS - schematic description wi
Page 25 and 26: Alkaline Hydrolysis - Level of MCPA
Page 27 and 28: Conclusion Modified QuEChERS metho
Page 29 and 30: www.QuEChERS.com CRL-SRM CRL Worksh
Page 31 and 32: Acids validation - Matrices Cucumbe
Page 33 and 34: Acids validation - Matrices Raisins

QuEChERS Validation Method for Acidic Pesticides - EURL ...

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