QuEChERS for Agricultural Residue Pretreatment
The average sample addition recovery rate of QuEChERS method is higher than 85%, with fewer impurities interfering with the detection of the target substance, a small amount of solvent, simple and fast operation, which will be the preferred pretreatment method for routine detection of pesticide residues in small laboratories around the world.
In addition to the QuEChERS method, currently commonly used methods for the pretreatment of agricultural residues in food include:
1. Solid phase extraction (SPE)；
2. Solid phase microextraction (SPME)；
3. Gel permeation chromatography (GPC)；
4. Supercritical fluid extraction (SFE)；
5. Matrix solid-phase dispersion extraction (MSPDE)；
6. Accelerate solvent extraction (ASE).
Some improvements to the QuEChERS method are intended to ensure the effective extraction of ph-sensitive compounds (such as phenoxycarboxylic acids), minimize the degradation of unstable compounds (such as alkaline or acidic unstable pesticides), and expand the range of food substrate types that can be used with QuEChERS method.
The application prospect
Hawach QuEChERS method can be applied to the extraction and purification of various molecular structures and polar pesticide residues. The method is simple, rapid, accurate and sensitive.