Wide Range and Improvements of QuEChERS
QuEChERS is a streamlined technique that makes it easier and cheaper for analytical chemists to examine the pesticide residues in agricultural products. It is exploited by many professors of the American Ministry of Agriculture in 2003, especially Anastassiades. This technique shares the same principle with high-performance liquid chromatography and solid-phase extraction. That is the interaction between the impurities in the sample and the adsorbent.
The basic steps of QuEChERS can be included in several points.
1. Thoroughly grind the sample
2. Acetonitrile single solvent extraction and separation
3. Add salts to dehydrate, such as MgSO4
4. Add adsorbent to remove impurities
5. Detect by GC-MS、LC-MS
1. High recovery
2. High accuracy and precision
3. Wide applicability
4. High efficiency with 6 samples in 30 minutes
5. Less solvent and less pollution
6. Easy to operate
Generally, QuEChERS is used for recovering pesticide residues from agricultural products, for example, fruits and vegetables. However, it got popularity in the comprehensive isolation of analytes from different matrices. As time goes by, improvements and changes to the original technique are discussed.
Wide Range of Applications
Currently, QuEChERS is ordinary sample preparation and purification technology used for the analysis of multi-pesticide residues in high-humidity food. Hawach Scientific constantly endeavors to improve the performance of QuEChERS, aims at enlarging the application areas, and adapting to different circumstances with lower costs.
Such improvements of Hawach obviously enhance the recovery rate of certain kinds of pesticides. Hawach’s QuEChERS not only fits the analysis of fruits and vegetables but also can be used as a preparation method for many food samples, such as meat, soybean, animal food, and other foods.