| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
20/07/1999 |
|
Data da última atualização: |
12/12/2019 |
|
Autoria: |
BONATO, P. S.; LANCHOTE, V. L.; DREOSSI, A. de C. |
|
Afiliação: |
EMBRAPA-CNPMA. |
|
Título: |
High performance liquid chromatographic screening and gas chromatography-nass spectrometry confirmation of tebuthiuron residues in drinking water. |
|
Ano de publicação: |
1999 |
|
Fonte/Imprenta: |
Journal of High Resolution Cromatography, v.22, n.4, p.239-241, 1999. |
|
Páginas: |
p. 239-241 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Tebuthiuron (N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N-dimethylurea) is a phenylurea herbicide used in sugar cane culture for the pre- and post-emergence control of weeds [1,2]. Analysis of tebuthiuron (Figure 1) and of other phenylurea herbicides in environmental samples can be performed by HPLC [3-10], or by gas chromatography using selective detectors such as nitrogen-prosphorus detector (NPD), eletron-capture detector (ECD), or a mass spectrometer (MS) [11-16]. Although Loh et al [17] reported that the use of temperatures above 280oC permits quantitative tebuthiuron breakdown, thus permitting the analysis of the products of decomposition formed, methods based on gas chromatography usually involve a derivatization step to permit analysis of this thermal unstable herbicide in its unchanged form [11,12,18]. These methods have been applied to the determination of tebuthiuron residues in soil, foods, and plant material but none of them has been reported for the evaluation of this compound in water. In the present study we describe two methods for tebuthiuron analysis in water samples. The samples were first analyzed by HPLC and the results were confirmed by GC-MS after acetic anhydride derivatization. The methods were applied to the analysis of this herbicide in surface and ground water samples colected from the Espraiado Stream watershed (Ribeirao Preto region, state of Sao Paulo, Brazil). This watershed represents one of the reloading points of the Botucatu ground water table, the largest and most important one in the center-south region of Brasil, including eight Brazilian states and parts of Argentina, Uruguay, and Paraguay, and covering an area of approximately 1.200.000 km2 [19]. MenosTebuthiuron (N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N-dimethylurea) is a phenylurea herbicide used in sugar cane culture for the pre- and post-emergence control of weeds [1,2]. Analysis of tebuthiuron (Figure 1) and of other phenylurea herbicides in environmental samples can be performed by HPLC [3-10], or by gas chromatography using selective detectors such as nitrogen-prosphorus detector (NPD), eletron-capture detector (ECD), or a mass spectrometer (MS) [11-16]. Although Loh et al [17] reported that the use of temperatures above 280oC permits quantitative tebuthiuron breakdown, thus permitting the analysis of the products of decomposition formed, methods based on gas chromatography usually involve a derivatization step to permit analysis of this thermal unstable herbicide in its unchanged form [11,12,18]. These methods have been applied to the determination of tebuthiuron residues in soil, foods, and plant material but none of them has been reported for the evaluation of this compound in water. In the present study we describe two methods for tebuthiuron analysis in water samples. The samples were first analyzed by HPLC and the results were confirmed by GC-MS after acetic anhydride derivatization. The methods were applied to the analysis of this herbicide in surface and ground water samples colected from the Espraiado Stream watershed (Ribeirao Preto region, state of Sao Paulo, Brazil). This watershed represents one of the reloading points of the Botucatu ground... Mostrar Tudo |
|
Palavras-Chave: |
Analysis; Contamination; Residues. |
|
Thesaurus Nal: |
calibration; environmental impact; groundwater; herbicides; quality control. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/199598/1/Bonato-High.pdf
|
|
Marc: |
LEADER 02510naa a2200253 a 4500
001 1013136
005 2019-12-12
008 1999 bl uuuu u00u1 u #d
100 1 $aBONATO, P. S.
245 $aHigh performance liquid chromatographic screening and gas chromatography-nass spectrometry confirmation of tebuthiuron residues in drinking water.$h[electronic resource]
260 $c1999
300 $ap. 239-241
520 $aTebuthiuron (N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N-dimethylurea) is a phenylurea herbicide used in sugar cane culture for the pre- and post-emergence control of weeds [1,2]. Analysis of tebuthiuron (Figure 1) and of other phenylurea herbicides in environmental samples can be performed by HPLC [3-10], or by gas chromatography using selective detectors such as nitrogen-prosphorus detector (NPD), eletron-capture detector (ECD), or a mass spectrometer (MS) [11-16]. Although Loh et al [17] reported that the use of temperatures above 280oC permits quantitative tebuthiuron breakdown, thus permitting the analysis of the products of decomposition formed, methods based on gas chromatography usually involve a derivatization step to permit analysis of this thermal unstable herbicide in its unchanged form [11,12,18]. These methods have been applied to the determination of tebuthiuron residues in soil, foods, and plant material but none of them has been reported for the evaluation of this compound in water. In the present study we describe two methods for tebuthiuron analysis in water samples. The samples were first analyzed by HPLC and the results were confirmed by GC-MS after acetic anhydride derivatization. The methods were applied to the analysis of this herbicide in surface and ground water samples colected from the Espraiado Stream watershed (Ribeirao Preto region, state of Sao Paulo, Brazil). This watershed represents one of the reloading points of the Botucatu ground water table, the largest and most important one in the center-south region of Brasil, including eight Brazilian states and parts of Argentina, Uruguay, and Paraguay, and covering an area of approximately 1.200.000 km2 [19].
650 $acalibration
650 $aenvironmental impact
650 $agroundwater
650 $aherbicides
650 $aquality control
653 $aAnalysis
653 $aContamination
653 $aResidues
700 1 $aLANCHOTE, V. L.
700 1 $aDREOSSI, A. de C.
773 $tJournal of High Resolution Cromatography$gv.22, n.4, p.239-241, 1999.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 409 | |
| 10. |  | ANDRADE, E. B. de. Indução de mutação. Belém, PA: IPEAN, 1973. 10 p. Apresentado no Seminário Técnico realizado em marco de 1973. Publicação não convencional. Mimeografado.| Biblioteca(s): Embrapa Amazônia Oriental. |
|    |
| 20. | | DALTRO, C. B.; ANDRADE, E. C. de. Estudo da similaridade existente entre a rdrp do vírus da meleira do mamoeiro ("PAPAYA MELEIRA VIRUS") e a rdrp de diferentes micovírus. In: REUNIÃO ANUAL DE CIÊNCIA, TECNOLOGIA, INOVAÇÃO E CULTURA NO RECÔNCAVO DA BAHIA - RECONCITEC, 2., 2012, Cruz das Almas. Energias Renováveis, Educação, Tecnologia e Sociedade. Cruz das Almas, BA: UFRB, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
|  |
| Registros recuperados : 409 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
