Determinação de agrotóxicos em alfaces (lactuca sativa l.) orgânicas comercializadas em feiras agroecológicas de João Pessoa-PB

Abstract

Every day the man is more concerned with his well being, the search for a better diet that not only satisfies him physiologically, but also is free of any contaminant. Organic products have become an outlet for those who want to consume a food free of chemical additives, and the famous agro-ecological fairs throughout the country are the main gateway to these foods, which are maintained mainly by family farming. In Brazil, producers of family farming are exempt from certification for the marketing of their products, so there must be some degree of trust between producer and consumer. There are several complaints in the organ responsible for fraud in the production and marketing of organic products, where pesticides could be used. Therefore, the present work was carried out in order to verify the presence of possible pesticides in the organic foods, lettuce (Lactuca sativa L.) is one of the most present vegetables in the table of the Brazilians, fact that made it the food of choice for the accomplishment of the present job. The lettuces were harvested from June to August 2016 and were used in all agro-ecological fairs in João Pessoa, and the Low-Temperature Partitioning Solid-Liquid Extraction (ESL-PBT) and Gas Chromatography coupled to Mass Spectrum were used to determine the residues of pesticides. The technique was efficient, but in none of the samples was detected residues of pesticides. The results were satisfactory for both the producer and the consumer, thus improving their trust.