Data/hora: 17/06/2024 03:51:08

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	14/03/2023	
Data da última atualização: 	20/03/2023	
Autoria: 	PIRES, N. L.; ARAÚJO, A. P. de; OLIVEIRA FILHO, E. C. de; CALDAS, E. D.	
Afiliação: 	NAYARA LUIZ PIRES, INSTITUTO FEDERAL DE GOIÁS; ESMERALDA PEREIRA DE ARAÚJO, UNIVERSIDADE DE BRASÍLIA; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC; ELOISA DUTRA CALDAS, UNIVERSIDADE DE BRASÍLIA.	
Título: 	An ultrasensitive LC-MS/MS method for the determination of glyphosate, AMPA and glufosinate in water - analysis of surface and groundwater from a hydrographic basin in the Midwestern region of Brazil.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Science of The Total Environment, v. 875, n. 1624991, June 2023.	
DOI: 	https://doi.org/10.1016/j.scitotenv.2023.162499	
Idioma: 	Inglês	
Conteúdo: 	Abstract: The intensive use of glyphosate around the world in the last few decades demands constant monitoring of this compound and its metabolite in aquatic compartments. This work aimed to develop a sensitive method for the analysis of glyphosate, AMPA and glufosinate in water by liquid chromatography/tandem mass spectrometry (LC-MS/MS). The method involves analyte concentration by lyophilization (20×) and direct injection on the LC-MS/MS, and was satisfactorily validated at a LOQ of 0.0025&#8239;&#956;g&#8239;L&#8722;1. A total of 142 samples of surface and groundwater collected during the 2021/2022 dry and rainy seasons in the Rio Preto Hydrographic Basin were analyzed. All the 52 groundwater samples were positive for glyphosate (up to 1.5868&#8239;&#956;g&#8239;L&#8722;1, dry season) and AMPA (up to 0.2751&#8239;&#956;g&#8239;L&#8722;1, dry season). A total of 27 of the 90 surface water samples were positive for glyphosate (up to 0.0236&#8239;&#956;g&#8239;L&#8722;1), and 31 samples for AMPA (up to 0.0086&#8239;&#956;g&#8239;L&#8722;1), over 70&#8239;% collected during the dry season. Glufosinate was detected in only five samples, four in groundwater (up to 0.0256&#8239;&#956;g&#8239;L&#8722;1). The levels found in the samples are much lower than the maximum levels established by the Brazilian legislation for glyphosate and/or AMPA and lower than the most critical toxicological endpoints for aquatic organisms. However, constant monitoring is necessary, demanding sensitive methods to allow the detection of the very low levels of these pesticides in water.	
Palavras-Chave: 	Glifosato; LC-MS/MS.	
Thesagro: 	Bacia Hidrográfica; Contaminação; Cromatografia; Ecologia Aquatica; Herbicida; Toxicologia.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/247989/1/1-s2.0-S0048969723011154-main.pdf	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (37530-1) - UPC - AP - DD -  -  -  - DIS