Clorpirifós em cenoura: otimização, validação e análises de amostras reais

Abstract

Due to the growth of agricultural production, there was a need to increase the use of pesticides to control pests. In this scenario, Brazil occupies the first place in the world ranking since 2008, being a worrying factor due to the problems caused to human health and the environment by this exorbitant use. Carrot is a vegetable widely consumed by Brazilians, whether fresh or processed, and according to the National Health Surveillance Agency (ANVISA), in the last Pesticide Residue Analysis Program cycle 2017-2018, irregular detections of the pesticide were found chlorpyrifos in carrots, which is prohibited for carrot cultivation. In this sense, to analyze carrots from the city of Itumbiara-Go, the optimization and validation of the liquid solid extraction method with low temperature partition (SLE-LTP) was carried out. The method proved to be effective, since all parameters analyzed, such as selectivity, linearity, precision, accuracy, limit of detection and quantification, were within the limits allowed for validation of analytical methods. After optimization and validation, carrots were collected from four different points and submitted to the optimized method. After the analyses, it was found that the carrot samples at the four points were contaminated with the pesticide chlorpyrifos, at different concentrations, which is a worrying factor due to its consequences for human health and the environment.