QuEChERS are widely used in sample handling before food safety inspection. And food safety inspection is vitally important to our life and health. Today, here we are going to talk about the QuEChERS rationale and some relating aspects.
Pesticide residue analysis
Pesticide residue analysis is a complex trace analysis technique. The traditional pretreatment methods mainly include soxhlet extraction, oscillatory extraction, liquid-liquid partitioning, column chromatography, and centrifugation. These methods have the disadvantages of single sample extraction, long purification time, the large amount of toxic organic solvent, low sample recovery rate, and large impact on human health and environment, which can not meet the needs of pesticide analysis in modern batch foods.
At the same time, the composition of various foods is complex, which increases the difficulty of analysis and puts forward more stringent requirements for pesticide residue detection technology.
New technologies
At present, new technologies that have been reported or have been widely used include solid-phase extraction SPE, solid-phase microextraction SPME, supercritical fluid extraction SFE, ultrasonic extraction USE, microwave-assisted extraction MAE, rapid solvent extraction ASE, matrix solid-phase dispersion extraction MSPD, gel permeation chromatography GPC, molecularly imprinted synthetic receptor technology MISR, and the like.
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