Data/hora: 04/05/2024 02:06:15

Biblioteca(s): 	Embrapa Clima Temperado; Embrapa Meio Ambiente.	
Data corrente: 	16/07/2014	
Data da última atualização: 	19/12/2014	
Autoria: 	ASSALIN, M. R.; QUEIROZ, S. C. do N. de; FERRACINI, V. L.; OLIVEIRA, T.; VILHENA, E.; MATTOS, M. L. T.	
Afiliação: 	MARCIA REGINA ASSALIN, CNPMA; SONIA CLAUDIA DO N DE QUEIROZ, CNPMA; VERA LUCIA FERRACINI, CNPMA; TACIANA OLIVEIRA, CNPQ; EDER VILHENA, FAJ; MARIA LAURA TURINO MATTOS, CPACT.	
Título: 	A method for determination of imazapic and imazethapyr residues in soil using an ultrasonic assisted extraction and LC-MS/MS.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Bulletin of Environmental Contamination and Toxicology, California, v. 93, n. 3, p. 362-364, 2014.	
DOI: 	10.1007/s00128-014-1330-6	
Idioma: 	Inglês	
Conteúdo: 	Abstract At least 52 % of the planted rice area in Rio Grande do Sul, a major rice producing state in Brazil, employs Clearfield Ò production system, corresponding to 580,000 ha of cultivated area. To grow rice with Clear- field Ò technology, producers combine imazethapyr and imazapic herbicides. However, these herbicides leave residual activity in soil; consequently, the repeated appli- cation of imazethapyr and imazapic on Brazilian Clear- field Ò rice fields has increased these herbicides persistence in treated soils. In this study, a method has been developed for removal and quantification of imazethapyr and imaza- pic residues in soil through ultrasonic assisted extraction using methanol?phosphoric acid aqueous solution (pH 2.0). The detected response was linear for both herbicides within the range of 0.25?5 ng mL -1 with correlations coefficients [0.99. The quantification limit was limit of quantification 0.2 lg Kg -1 for both pesticides. The good recovery rate from all pesticides, which ranges between 70 % and 120 %, demonstrates the method?s validity.	
Palavras-Chave: 	Clearfield production system; Imidazolinone; Residue analysis.	
Thesagro: 	Análise química; Cromatografia; Herbicida; Poluição ambiental; Resíduo químico; Solo.	
Thesaurus Nal: 	Chemical analysis; Imidazolinone herbicides; Liquid chromatography; Mass spectrometry; Multiresidue analysis; soil; Soil pollution.	
Categoria do assunto: 	--
P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Meio Ambiente (CNPMA)	
Exemplares: 	CPACT - (17645-1) - UPC - AP - DD - 00062 -  - 2014.00062 - DIS
CNPMA - (13285-1) - UPC - AP - DD -  -  -  - DIS