QuEChERS

A simplified method of sample preparation for pesticide analysis. QuEChERS extraction method is designed for multi-residue pesticide analysis of fruits and vegetables coupled with a clean-up method that removes sugars, lipids, organic acids, sterols, proteins, pigments, and excess water. This technique offers a user-friendly alternative to traditional liquid-liquid and solid-phase extractions. Compared to sample preparation traditional techniques, CHM® solutions offer: · Saving time for sample preparation. · Economic and effective sample preparation · Reliability and easy usage. The process involves two simple steps; Firstly, the homogenized samples are extracted and partitioned using an organic solvent and salt solution. Then, the supernatant is further extracted and cleaned using a dispersive solid- phase extraction technique. Currently, there are four QuEChERS method variants: · Original method: Introduced in 2003, it uses NaCl to improve the extraction. · Dispersive method AOAC 2007.01 according to the Association of Analytical Communities (AOAC), it uses Sodium Acetate as a buffer instead of NaCl. · Double phase variant: It uses PSA and GBC (Graphitized Carbon Black) to remove high levels of pigments, such as chlorophyll or carotenoid and sterols in the final extract without the loss of planar pesticides using a mixture of Acetone: Toluene (3:1). · European method EN15662:2008: Similar method to AOAC except for the use of NaCl, Sodium Citrate Dihydrate and Sodium Citrate Sesquihydrate instead of Sodium Acetate.