Data/hora: 29/05/2024 05:43:31

Provedor de dados: | Acta Agronómica
País: | Colombia
Título: | Electrochemical quantification of chlorpyrifos in white (Allium cepa L.) and green (Allium fistulosum L.) onions
Autores: | García Colmenares,José Mauricio; Páez Cepeda,Leidy Paola; Chaparro Acuña,Sandra Patricia.
Data: | 2019-09-01
Ano: | 2019
Palavras-chave: | Chlorpyrifos; Linear Sweep Polarography; Onion; Organophosphates.
Resumo: | Abstract The Linear sweep voltammetry method (LSP) of a common pesticide such as chlorpyrifos (CP) an organophosphate pesticide (OPP) in white (Allium cepa L.) and green onions (Allium fistulosum L.) was investigated. A hanging mercury drop electrode (HMDE) Ag/AgCl was used as reference electrode and platinum as a counter electrode. The OPP was extracted from the onion through liquid-liquid partition using acetone/dichloromethane as the solvent. Validated method was compared with GC/ECD as a reference method. CP concentration was not different between the two analytical techniques; the analysis was performed with a confidence level of 90%, corresponding to the polarographic method. CP concentration was 0.8400 ± 0.062 ppm in Allium cepa and 0.062 ± 0.300 ppm in Allium fistulosum L. These values exceed the ADI and ARD values for chlorpyrifos established by current regulations.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000300237
Editor: | Universidad Nacional de Colombia
Relação: | 10.15446/acag.v68n3.75456
Formato: | text/html
Fonte: | Acta Agronómica  v.68 n.3 2019
Fonte: | info:eu-repo/semantics/openAccess