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Study of the best conditions to determine pesticides in waters and sediments of the Cauca-Colombia River

Conditions to determine pesticides in water and sediments

10.24050/reia.v20i39.1608
Published 2022-12-20
Articles

Abstract

The different agricultural, industrial and economic activities generate pesticide residues that are reaching the different bodies of water, contaminating lakes, rivers, soils, biota, among others. In order to monitor these types of substances in the environment, it is necessary to adjust the analysis procedure in the best possible way. This work allowed to establish the best extraction and determination conditions of the pesticides simazina, atrazina, diuron, carbaril, propanil and metomil in river waters and sediments. Solid phase extraction (SPE) and ultrasound methods were used for the extraction of pesticides present in water and sediments respectively. The determination of the compounds was carried out by high performance liquid chromatography (HPLC-UV). The method was tested on water and sediment samples from the Cauca River as it passed through the Department of Valle del Cauca-Colombia-South America. Recovery percentages above 87% were obtained for five of the six pesticides extracted by SPE and above 80% for all pesticides extracted by ultrasound. The pesticides with the highest frequency found in the waters and sediments of the Cauca River were simazine, atrazine and diuron.

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