QuEChERS is a special SPE phase for quick and cheap determination of pesticides in strong matrix-contaminated samples by GC or HPLC ( QuChERS method = Quick Easy Cheap Effective Rugged Safe)
For extraction, the European standard EN 15662 recommends a citrate extraction mix (Mix I), while AOAC standard 2007.1 uses an acetate extraction mix (Mix II)
For clean-up, the Diamino phase (psa) removes sugars and organic acids. MgSO4 removes water, C18 and nonpolar interferences such as fats. The carbon phase removes pigments, sterols and nonpolar interferences.