Frequently asked questions about QuEChERS products in experiments (part 1)

1. Is Hawach’s QueChers product mainly used in food?

A: Yes, the method is currently mainly used in the food field. QuEChERS was originally a method for extracting multiple pesticide residues in fruits and vegetables, but now it has been used in more and more fields (eg, veterinary drugs, polycyclic aromatic hydrocarbons and antibiotics, etc.) to detect more and more different samples. (such as plasma, meat, soil). However, compared with the pesticide detection methods in agricultural products, the latter methods have not been extensively verified.

2. Can you give us a rough comparison of the use of conventional SPE and QuEChERS products, the cost of each sample is listed, probably estimated on the line.

A: The cost of these two methods is relatively difficult. It is affected by factors such as the specific test items, whether the samples need to be concentrated, and whether you use QuEChERS products. There is a statistic that should explain this problem. Nearly 40% of the 130 to 150 participating laboratories in Europe in 2009 used the QuEChERS method to detect pesticide residues. For private laboratories, QuEChERS adoption rates are as high as nearly 70% due to their increased cost. The high throughput and organic solvent savings of the samples brought by the QuEChERS method are also the reason why this method has received wide attention in foreign laboratories. Lethony has done a statistic in Europe. The traditional purification method requires approximately 500 mL of organic solvent (Luke method), while the QuEChERS method requires only 10 mL or 15 mL.

3. The agricultural industry standard of the People’s Republic of China NY/T 1380-2007, our laboratory has used this method to detect pesticide residues, the method is roughly the same as QuEChERS, but in practice, there are many problems in sample processing, recovery rate, matrix benefit, pigment High, viscous …(mainly dry powder of plant extracts)