Quechers


About

   

 

QuEChERS – a Simplified Method of Sample Preparation for Pesticide Analysis In 2003, M Anastassisdes developed a simple way to prepare food samples for pesticide analysis. It's called QuEChERS (pronounced as "Catchers"), an acronym for Quick, Easy, Cheap, Effective, Rugged and Safe. With QuEChERS, you could prepare your samples in multi-class, multi-residue pesticide analysis while saving time and money.

How QuEChERS works?

QuEChERS extraction method is designed for multi-residue pesticide analysis of fruits and  vegetables with high water content (80%-95%). Some compounds will interfere the detection  of target pesticide, such as chlorophyll, fatty acid, pigment, which could be removed by  QuEChERS.

Some QuEChERS methods add buffers during the extraction step. Two most common  methods are the European Committee for Standardization (EN 15662) method which  applies citrate buffer for extraction and the Association of Analytical Communities (AOAC  2007.01) method using acetic acid buffer.

For low-water content fruits and vegetables, additional water needs to be added to optimize  the extraction. For high-fatty content fruits and vegetables, C18E should be added to remove  it. For high-pigment content fruits and vegetables, graphicarb should be added.

Description Qty Size Tube Content Cat. Number
AOAC Method 2007.01, 25 50ml 6 g MgSO4, 1.5 g NaAcetate QE0520
EN Method 15662 25 50ml 4 g MgSO4, 1 g NaCl, 1 g NaCitrate, 0.5 g disodium citrate sesquihydrate QE0510
Original Quechers Method 25 50 ml 4 g MgSO4, 1 g NaCl QP4300
Original QuEChERS Method 25 50 ml 6 g MgSO4, 1.5 g NaCl QEMSCO50