Before QuEChERS born
In 1989, Barker et al. first proposed matrix solid-phase dispersion (MSPD technology) which can simultaneously disperse and extract solid and semi-solid samples. This method grinds the solid-phase extraction material coated with various polymers such as C18 with the sample and takes it as packing, and elute various analytes with different solvents.
This technology concentrates the process of sample homogenization, extraction, purification, etc. in traditional sample preparation; it reduces tissue homogenization, sedimentation, and centrifugation. , pH adjustment and sample transfer steps; avoid the loss of samples, and gradually become widely used in various fields.
QuEChERS method born
In 2003, the US Department of Agriculture Food and Drug Administration and the Slovenian Public Health Institute jointly developed a new sample pretreatment technology based on matrix solid-phase dispersion technology. A method based on solid-phase extraction and matrix solid-phase dispersion was proposed by Anastassiades and Lehotay.
The technical detection method is a sample pretreatment technology with the characteristics of quick, easy, cheap, effective, rugged and safe, etc., named the QuEChERS method. The method was announced and soon became widely used.
Principle of QuEChERS
QuEChERS method utilizes acetonitrile to extract pesticide residues in the sample, and the salt is separated by sodium chloride and anhydrous magnesium sulfate, and the extract is purified by anhydrous sodium sulfate and PSA (N-propyl ethylenediamine filler dispersed solid-phase extraction. The multi-residue analysis was performed using GC, GCIIMS, and the like.
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