New Developments in QuEChERS methodology

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EPRW 2006, Corfu Slide 18 Weigh 10 g of Frozen Sample Add 10 mL Acetonitrile Add ISTD-Solution Shake Add 4 g MgSO 4 / 1 g NaCl / Buffered to pH 5-5.5 with Citrate Buffer Shake & Centrifuge Mix an Aliquot with MgSO4 & PSA/(GCB) Shake & Centrifuge Acidify extract to pH ~5 to protect base-sensitive pesticides Optionally: Add other “Analyte Protectants” Optionally: Acidic Pesticides LC-MS Optionally: SUs LC-MS <strong>QuEChERS</strong> Multiresidue Analysis by GC-MS, LC-MS ...
EPRW 2006, Corfu Slide 19 Broaden matrix spectrum Dry commodities (cereals, dried fruits) Fatty Commodities
Page 1 and 2: New Developments in QuEChERS method
Page 3 and 4: QuEChERS: •Quick •Easy •Cheap
Page 5 and 6: EPRW 2006, Corfu Slide 5 Analyte an
Page 7 and 8: Ionizable Compounds - Basic Pestici
Page 9 and 10: pH-Labile Compounds EPRW 2006, Corf
Page 11 and 12: Optimal pH for QuEChERS ? pH adjust
Page 13 and 14: Optimal pH for QuEChERS ? pH adjust
Page 15 and 16: Alox N Supelco, C18 C8-Varian, C8-A
Page 17: EPRW 2006, Corfu Slide 17 Improved
Page 21 and 22: Sample type Cereals Dried fruits Fr
Page 23 and 24: Removal of co-extracted lipids Extr
Page 25 and 26: 100 75 50 25 0 EPRW 2006, Corfu Sli
Page 27 and 28: GC-MS and LC-MS/MS Inter-Laboratory
Page 29 and 30: LC-MS/MS Inter-Laboratory Validatio
Page 31 and 32: EU - Proficiency Test 6 and 7 EU-PT
Page 33: Thank you for your attention! ....a

New Developments in QuEChERS methodology

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