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Extraction of Pesticides from Difficult Matrices

October 29, 2018
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Summary

 

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. The EDGE® provides a valuable alternative to the QuEChERS method for the extraction of pesticides from food matrices, including matrices known to be difficult. With its patent pending Q-Cup Technology™, the EDGE can extract a difficult food sample, including the dispersive solid phase cleanup, in less than 7 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. This creates a driving need for pesticide analysis; this need for testing is further bolstered with an ever-increasing list of regulated pesticides. The QuEChERS method has become a widely accepted method to meet some of these challenges; however, due to the large number of pesticides to monitor and the low method detection limits, 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 a single sample cell, meaning extraction and cleanup is performed in one step. The collected extract is automatically 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 automated pesticide extraction possible in one simple method.