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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
19/06/2007 |
Data da última atualização: |
19/06/2007 |
Autoria: |
FIGUEIREDO, F. A. M. de; CRUZ, L. C. G. da; OLIVEIRA, A. N. de; SACCHETTI, H. P.; LAGE, G. R. H.; PASSOS, A. H. |
Título: |
Língua azul: presença de ssintomas clínicos nos animais reagentes positivos em foco no município de Duque de Caxias, estado do Rio de Janeiro, Brasil. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Revista Brasileira de Medicina Veterinária, Rio de Janeiro, v. 29, n. 1, p. 20-23, jan./mar. 2007. |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Rio de Janeiro. |
Thesagro: |
Caprino; Diagnostico; Doença Animal; Língua Azul; Ovino; Sintoma; Vírus. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00868naa a2200277 a 4500 001 1533179 005 2007-06-19 008 2007 bl uuuu u00u1 u #d 100 1 $aFIGUEIREDO, F. A. M. de 245 $aLíngua azul$bpresença de ssintomas clínicos nos animais reagentes positivos em foco no município de Duque de Caxias, estado do Rio de Janeiro, Brasil. 260 $c2007 650 $aCaprino 650 $aDiagnostico 650 $aDoença Animal 650 $aLíngua Azul 650 $aOvino 650 $aSintoma 650 $aVírus 653 $aBrasil 653 $aRio de Janeiro 700 1 $aCRUZ, L. C. G. da 700 1 $aOLIVEIRA, A. N. de 700 1 $aSACCHETTI, H. P. 700 1 $aLAGE, G. R. H. 700 1 $aPASSOS, A. H. 773 $tRevista Brasileira de Medicina Veterinária, Rio de Janeiro$gv. 29, n. 1, p. 20-23, jan./mar. 2007.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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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
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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.
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Embrapa Meio Ambiente (CNPMA) |
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