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Extraction of Pesticides from Difficult Food Matrices

October 11, 2017
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Abstract


The QuEChERS method has been shown to be practical for pesticide analysis on a number of different sample types and is increasingly being employed on more difficult matrices.  Unfortunately, this process is a manual multi-step process that can be time consuming. With so many different types of food matrices and pesticide residues to be analyzed there is a need for a faster simplified extraction method. Furthermore, some matrices either by their nature or their economic value, can be difficult to analyze with just the QuEChERS method alone. In this application note we propose the EDGE™ as an alternative to the QuEChERS method for the extraction of pesticides from food matrices including known difficult matrices. With its patent pending Q-Cup Technology™ the EDGE can extract a difficult food sample, including the dispersive solid phase cleanup, in less than 5 minutes in one automated step.

 

Introduction


More and more consumers want to know what is in their food, particularly anything that could be harmful, such as pesticides. There is a driving need for pesticide analysis and the list of pesticides regulated throughout the world continues to increase. The QuEChERS method has become a widely accepted method to extract pesticides from food matrices.  Due to the large number of pesticides to monitor and the low method detection limits, pesticide analysis can be a big challenge. Alternative methods can help aid in this challenge giving improved recoveries for difficult matrices with a faster and simplified method.

 

The manual multi-step process of the QuEChERS method requires multiple sample transfers and generates a lot of consumable waste. With the EDGE the sample and sorbents are together in one sample cell leading to extraction and cleanup in one step. In under 5 min the food sample is
extracted using Q-Cup Technology which performs both extraction and cleanup of the sample. The collected extract is filtered, cooled and ready for analysis. Included in the run time is both the rinsing of the sample and washing of the system ensuring no carryover. EDGE offers the fastest pesticide extraction possible in one simple method.

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