Avaliação da remoção de pesticidas em vinho branco por membranas de microfiltração

Abstract

The use of pesticides in agriculture is the subject of discussions due to the dangers generated for the environment and for human health. However, crop protection with chemical methods is a common practice in viticulture, due to the specificities of the grape culture, its diseases and pests. The number of pesticides, type and quantity applied to the vines varies significantly each year, depending on climatic conditions, growth of pests, incorrect application of the producer, etc. Therefore, pesticide residues are often detected in grapes and wine. In order to develop an alternative for the removal of pesticides in wines, this work evaluated the retention of the pesticide carbendazim and indoxacarb by microfiltration (MF) with polymeric membranes in white wine. The quality of the final product after MF was also evaluated through physical-chemical analyzes. The tested

membranes were 0.45 μm cellulose acetate (CA). The modified QuEChERS (Quick Easy Cheap Effective Rugged Safe) extraction method followed by direct infusion in high resolution mass spectrometry (DI-HRMS) and liquid chromatography coupled with high resolution mass spectrometry (HPLC-HRMS) were performed for analysis of pesticide residues from microfiltered fortified wine. The spectra obtained showed that the membrane showed a potential for pesticide retention after microfiltration, regardless of the concentration used in the fortification. The use of MF also preserved the quality of the wine, as it showed no changes in its physical and chemical characteristics after the process. Therefore, the use of MF polymeric membranes presents itself as a promising alternative in the removal of carbendazim and indoxacarb residues that may be present in wines. [resumo fornecido pelo autor]