Data/hora: 10/06/2024 02:08:08

Biblioteca(s): 	Embrapa Uva e Vinho.	
Data corrente: 	27/12/2019	
Data da última atualização: 	27/12/2019	
Autoria: 	VARELI, C. S.; PEZZUTTI, I. R.; GEBLER, L.; CARDOSO, C. D.; FONTANA, M. E. Z.; REICHERT, B.; JÂNICH, B. D.	
Afiliação: 	Catiucia S. Vareli, UFSM ionara.pezzutti@ceparc.com.br; Ionara R. Pezzutti, UFSM; LUCIANO GEBLER, CNPUV; Carmem D. Cardoso, UFSM; Marlos E. Z. Fontana, UFSM; Barbara Reichert, UFSM; Barbara D. Jânich, UFSM – Federal University of Santa Maria, Chemistry Department, Center of Research and Analysis of Residues and Contaminants (CEPARC), Campus, Santa Maria, RS, 97105-900, Brazil. E-mail: ionara.pizzutti@ceparc.com.br; Fax: +55 55 3220 9458; Tel: +55 55 32.	
Título: 	Evaluation of two extraction approaches for pesticide residue determination in biobeds using GC-MS/MS.	
Ano de publicação: 	2019	
Fonte/Imprenta: 	Analytical Methods, n. 11, p. 5455-5463, 2019	
Idioma: 	Inglês	
Conteúdo: 	The development of reliable and accurate analytical methods is a requirement to ensure biobed bioremediation capacity. In this study two extraction approaches were evaluated for the determination of captan (and its degradation product, tetrahydrophthalimide), chlorothalonil, chlorpyrifos-ethyl, fenitrothion, methidathion, phosmet and tebuconazole in biobeds. These pesticides were selected because of their importance for apple plantations and the biobeds were used for bioremediation of pesticide wastes sprayed on plantations. After some preliminary experiments, the best extraction approach was selected and subjected to a complete validation study as advised by the SANTE Guidance Document. The validated approach consists of an optimized version of the Dutch mini-Luke method and is performed in only 4 steps (extraction, phase partitioning, centrifugation and filtration), which makes it very convenient and attractive. Linearity of analytical curves (r 2 ), residuals, limits of detection (LODs) and quantification (LOQs), matrix effects (%), accuracy (in recovery%) and precision (as repeatability and reproducibility ? relative standard deviation, RSDr and RSDwR, respectively) were assessed. Two internal standards were used for quality control. Validation studies were performed by analyzing blank biobed samples spiked at 50, 100 and 200 mg kg1 (n ¼ 7) which yielded average recoveries from 75 to 117% and RSDr # 14%. The analytical curves obtained from matrix-matched standards were linear (r 2 $ 0.987) in the concentration range of 10 (or 20) to 300 mg L1 for all compounds, except for captan which was not detected in the validation study. LOQs were equal to 50 mg kg1 . The calculated matrix effects were $20%.	
Palavras-Chave: 	Biobed; Pesticide residue.	
Thesaurus Nal: 	Apples.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Uva e Vinho (CNPUV)	
Exemplares: 	CNPUV - (18387-1) - UPC - AP - DD -  -  -  - DIS