Checkout using your account
Checkout as a new customer
Creating an account has many benefits:
- See order and shipping status
- Track order history
- Check out faster
Quechers
QuEChERS is a sample preparation method developed for the fast and efficient extraction of pesticides and other residues from food samples. It stands for"Quick, Easy, Cheap, Effective, Rugged, and Safe" and describes the main advantages of this technique. QuEChERS simplifies the analysis process by using a combination of acetonitrile extraction and salt purification to ensure high purity of the extracted samples. This method has become widely used in food analysis due to its simplicity, cost-effectiveness and reliability.
Our MZ range includes manufacturers such as GL Sciences, UCT, Welch or Thermo Scientific with their QuEChERS product portfolio. We carry more than 11 manufacturers with more than 842 QuEChERS products in our online shop. We are happy to help you find the right QuEChERS product!
Technical Data
What different methods are there?
This special method for sample preparation was first published in 2003 by M. Anastassiades et al. in the"Journal of AOAC International"[1]. Since then, QuEChERS has become the most widely used method for sample preparation in pesticide analysis worldwide. To date, two methods for QuEChERS analysis have become established and are officially recognised: the European EN 15662 Method[2] and the AOAC Official 2007.01 Method[3]. The main difference between these two QuEChERS methods is the type of buffer salt used. The method according to EN 15662:2008[2] uses a citrate buffer, the method according to AOAC 2007. 01[3] uses an acetate buffer. The original published method does not require buffer salts[1].
What is the general procedure for QuEChERS analysis?
The procedure of this method is quite simple and the susceptibility to errors is very low. In addition, QuEChERS shows high recovery rates and can be applied to many analytes to be analysed.
First, the crude sample is mixed with a water-soluble solvent (e.g. acetonitrile) and an internal standard in a centrifuge tube and shaken well. Buffer salts are then added for better phase separation and stabilisation of acid- and base-labile pesticides. After thorough shaking and centrifugation, the crude extract is obtained. After the phases have separated, part of the upper phase is removed and further purified using dispersive solid phase extraction. Dispersive because, in contrast to normal solid phase extraction, the solid sorbent is now added directly to the sample. It is then shaken thoroughly and centrifuged again. This is how the final extract is obtained. The supernatant can then be analysed using liquid or gas chromatography in conjunction with other analytical methods (e.g. mass spectroscopy).
Downloads
Brochures
- Thermo Quechers Sample Preparation Brochure
- Macherey-Nagel CHROMABOND QuEChERS Brochure
- Restek Q-sep QuEChERS Products Catalogue
- Restek Q-sep QuEChERS NEw Product Supplement Brochure
- Restek Q-sep QuEChERS Extraction and Cleanup of Pesticide Residue Samples Applications
- Restek QuEChERS Developing New Methods for Pesticides in Dietary Supplements Applications
- UCT Chlorofiltr QuEChERS SPE Brochure
- UCT ENVIRO-CLEAN Quick QuEChERS Brochure
- UCT QuEChERS SPE Brochure 2016
The right column for you - we will be happy to support you individually
Competent consultants are always at your side. Write a message to our consultants, we will get back to you and give you individual support.
You will find:
Application support
Availability and delivery times
Price information with individual conditions
Certificates of analysis, MSDS, data sheets