QuEChERS e MEFS: Técnicas de preparo de amostras para análise cromatográfica de resíduos de pesticidas em água e alimento

Abstract

Water and food are two of the main and most essential requirements for sustaining life. Both of these two types of matrices are subject to contamination by pesticides, which have increased in use since the mid-twentieth century, being used in vegetable crops as a means of helping to combat pests. However, these substances are harmful to the health of humans and animals that come into contact with them. Food is a type of extremely complex matrix, composed of fatty acids, proteins, fats, carbohydrates, pigments and other compounds, therefore, for the specific analysis of compounds such as pesticides, it is necessary to prepare the sample that can rid us of interferences and ensure the reliability of the analyses. The same goes for The QuEChERS method and MEFS are both extraction techniques that have their foundation in techniques prior to them, such as liquid-liquid extraction and solid-phase extraction. Both have distinct and often opposite characteristics, but either one or the other can be applied to food and aqueous samples for the determination of pesticides in such matrices. The purpose of this work was to carry out a bibliographical review of the QuEChERS method with citrate buffer and MEFS and to apply them in a practical way in samples of fruits and water for human consumption, respectively.