Determinação eletroanalítica de pesticidas carbamatos e ditiocarbamatos

Abstract

The use of pesticides, compounds that fight pests in agricultural practices, has increased added growth. Some pesticides are toxic chemical compounds, the number of cases of contamination of natural waters, soils and food by pesticide residues has also increased. The class of carbamates and the subclass of dithiocarbamates are used as pesticides, however indiscriminate use and above maximum limits can cause toxicity in humans and animals. The present work aimed to carry out a bibliographical survey showing analytical methodologies for the identification and quantification of pesticides of the carbamates class and the dithiocarbamates subclass, to identify as main electroanalytical techniques, to identify different types of materials used in the preparation of working electrodes and to discuss some applications specific, considering the identification of carbamates and dithiocarbamates in natural waters, soils, food and beverages. The study was developed through a literature review based on a systematic search in the scientific database "Science Direct" online. The perspective for an analytical determination of carbamates and dithiocarbamates pesticides when it comes to spectroscopic techniques is of little applicability due to the low selectivity of the technique. Referring to chromatographic techniques, good advantages due to the development of microcolumns, which allowed the use of modern chromatographic techniques. The use of electroanalytical techniques for the determination of carbamates and dithiocarbamate pesticides has positive perspectives and involves a variety of working electrode materials, which contribute to increased selectivity in the determination. Added to this is the favorable applicability of an association of separation techniques and detection techniques through an electrochemical detector for the determination of pesticides in general, an association in which solid amalgam electrodes show more promise.