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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
29/11/1997 |
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Data da última atualização: |
05/11/2015 |
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Autoria: |
DREOSSI, S. A. C.; LANCHOTE, V. L.; SANTOS, N. A. G.; CERDEIRA, A. L.; GOMES, M. A. F.; CARVALHO, D.; BONATO, P. S. |
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Afiliação: |
USP; USP; USP; ANTONIO LUIZ CERDEIRA, CNPMA; MARCO ANTONIO FERREIRA GOMES, CNPMA; USP; USP. |
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Título: |
GC-MS method for the determination of tebuthiuron in water. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: CONGRESS OF PHARMACEUTICAL SCIENCES, 1., 1997, Ribeirao Preto, SP. Bollettino Chimico Farmaceutico,v. 136, p.132, 1997. Abstract. |
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Idioma: |
Inglês |
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Conteúdo: |
Substituted phenylureas are selective herbicides used extensively in agriculture and are fairly persistent in the aquatic environment. This has led to the development of many analytical procedures based on high performance liquid cromatography or gas chromatography for determining phenylurea residues in aqueous samples. Although HPLC methods have the advantage of requiring no derivatization, gas chromatography methods seem to be more convenient when coupled to the mass espectrometer detector by providing the reliable of the presence of the herbicide. This technique was employed in the present study to investigate the presence of tebuthiuron residues in 40 aqueous environmental samples collected over a period of ten months (10/95 to 07/96) from the Espraido watershed, Ribeirao Preto, SP, Brazil. The procedure was based on the extraction of water samples (100 ml) with 12 ml of the extraction mixture consisting of dichloromethane: iso propanol (9:1, v/v), after addition of 25 ul of the internal standard solution (caffeine, 5 ug/ml) and alkalinization with 25 ul of 4 M NaOH. After mechanic shaking for 1 hour, 6 ml of the organic phases were separeted and evaporated to dryness under an air flow, at ambient temperature. The residues obtained were dissolved in 1 ml toluene and than, 100 ul of acetic anhydride was added. The mixture was heated for 2 h at 170oC. After cooling, the mixture was again evaporated to dryness and the residue was dissolved in 25 ul of acetone for gas chromatography analysis using a GC-MS QP5000 Shimadzu apparatus. The derivatives of tebuthiuron and caffeine were separated on a DB-5 column (J&W Scientific, 0,25 mmx30m, film of 0,25 um) using the following oven temperature program: start at 60oC for 1 min, increase to 150oC with a rate of 20oC/min and then to 240oC with a rate of 10oC/min; helium was used as carrier gas. The mass spectrometry detector was operated in the single ion monitoring mode at the temperature of 230oC. The ions selected for specific detection were 171 and 156 for the tebuthiuron derivative and 194 and 109 for caffeine. Under the chromatographic conditions selected and by extracting 100 ml of water samples, the quantification limit was estimated to be 0.02 ug/l. Tebuthiuron was not detected in the samples analyzed using the procedure described above. MenosSubstituted phenylureas are selective herbicides used extensively in agriculture and are fairly persistent in the aquatic environment. This has led to the development of many analytical procedures based on high performance liquid cromatography or gas chromatography for determining phenylurea residues in aqueous samples. Although HPLC methods have the advantage of requiring no derivatization, gas chromatography methods seem to be more convenient when coupled to the mass espectrometer detector by providing the reliable of the presence of the herbicide. This technique was employed in the present study to investigate the presence of tebuthiuron residues in 40 aqueous environmental samples collected over a period of ten months (10/95 to 07/96) from the Espraido watershed, Ribeirao Preto, SP, Brazil. The procedure was based on the extraction of water samples (100 ml) with 12 ml of the extraction mixture consisting of dichloromethane: iso propanol (9:1, v/v), after addition of 25 ul of the internal standard solution (caffeine, 5 ug/ml) and alkalinization with 25 ul of 4 M NaOH. After mechanic shaking for 1 hour, 6 ml of the organic phases were separeted and evaporated to dryness under an air flow, at ambient temperature. The residues obtained were dissolved in 1 ml toluene and than, 100 ul of acetic anhydride was added. The mixture was heated for 2 h at 170oC. After cooling, the mixture was again evaporated to dryness and the residue was dissolved in 25 ul of acetone for gas chroma... Mostrar Tudo |
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Palavras-Chave: |
GC-MS. |
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Thesaurus Nal: |
tebuthiuron. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/87150/1/1997RAs-008.PDF
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Marc: |
LEADER 02995nam a2200205 a 4500
001 1012762
005 2015-11-05
008 1997 bl uuuu u00u1 u #d
100 1 $aDREOSSI, S. A. C.
245 $aGC-MS method for the determination of tebuthiuron in water.$h[electronic resource]
260 $aIn: CONGRESS OF PHARMACEUTICAL SCIENCES, 1., 1997, Ribeirao Preto, SP. Bollettino Chimico Farmaceutico,v. 136, p.132, 1997. Abstract.$c1997
520 $aSubstituted phenylureas are selective herbicides used extensively in agriculture and are fairly persistent in the aquatic environment. This has led to the development of many analytical procedures based on high performance liquid cromatography or gas chromatography for determining phenylurea residues in aqueous samples. Although HPLC methods have the advantage of requiring no derivatization, gas chromatography methods seem to be more convenient when coupled to the mass espectrometer detector by providing the reliable of the presence of the herbicide. This technique was employed in the present study to investigate the presence of tebuthiuron residues in 40 aqueous environmental samples collected over a period of ten months (10/95 to 07/96) from the Espraido watershed, Ribeirao Preto, SP, Brazil. The procedure was based on the extraction of water samples (100 ml) with 12 ml of the extraction mixture consisting of dichloromethane: iso propanol (9:1, v/v), after addition of 25 ul of the internal standard solution (caffeine, 5 ug/ml) and alkalinization with 25 ul of 4 M NaOH. After mechanic shaking for 1 hour, 6 ml of the organic phases were separeted and evaporated to dryness under an air flow, at ambient temperature. The residues obtained were dissolved in 1 ml toluene and than, 100 ul of acetic anhydride was added. The mixture was heated for 2 h at 170oC. After cooling, the mixture was again evaporated to dryness and the residue was dissolved in 25 ul of acetone for gas chromatography analysis using a GC-MS QP5000 Shimadzu apparatus. The derivatives of tebuthiuron and caffeine were separated on a DB-5 column (J&W Scientific, 0,25 mmx30m, film of 0,25 um) using the following oven temperature program: start at 60oC for 1 min, increase to 150oC with a rate of 20oC/min and then to 240oC with a rate of 10oC/min; helium was used as carrier gas. The mass spectrometry detector was operated in the single ion monitoring mode at the temperature of 230oC. The ions selected for specific detection were 171 and 156 for the tebuthiuron derivative and 194 and 109 for caffeine. Under the chromatographic conditions selected and by extracting 100 ml of water samples, the quantification limit was estimated to be 0.02 ug/l. Tebuthiuron was not detected in the samples analyzed using the procedure described above.
650 $atebuthiuron
653 $aGC-MS
700 1 $aLANCHOTE, V. L.
700 1 $aSANTOS, N. A. G.
700 1 $aCERDEIRA, A. L.
700 1 $aGOMES, M. A. F.
700 1 $aCARVALHO, D.
700 1 $aBONATO, P. S.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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| Registros recuperados : 13 | |
| 2. |  | CERDEIRA, A. L.; PESSOA, M. C. P. Y.; BONATO. P. S.; QUEIROZ, R. H. C.; LANCHOTE, V. L. Metodologia analítica de resíduo do herbicida 2,4-d (ácido 2,4-diclorofenoxiacético) em água em área de cana-de-açúcar. Pesticidas: Revista de Ecotoxicologia e Meio Ambiente, Curitiba, v. 12, p. 99-110, jan./dez. 2002.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 3. | | CERDEIRA, A. L.; GOMES, M. A. F.; QUEIROZ, R. C.; BONATO, P. S.; FERRACINI, V. L.; LANCHOTE, V. L. Herbicide and nitrate residues in surface and groundwater from sugarcane area in Brazil. Bolletino Chimico Farmaceutico, v.138, n.2, p.131, 1999.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 4. | | CERDEIRA, A. L.; PESSOA, M. C. P. Y.; BONATO, P. S.; QUEIROZ, R. H. C.; LANCHOTE, V. L. Resíduos e lixiviação do herbicida picloram em água, em área de cana-de-açúcar. Revista Brasileira de Herbicidas, Brasília, DF, v. 3, n. 1, p. 75-81, 2002.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - C |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 6. | | QUEIROZ, R. H. C.; LANCHOTE, V. L.; BONATO, P. S.; TOZZATO, E.; CARVALHO, D. de; GOMES, M. A.; CERDEIRA, A. L. Determination of ametryn herbicide by bioassay and gas chromatography-mass spectrometry in analysis of residues in drinking water. Bolletino Chimico Farmaceutico, v.138, n.5, p.251-254, 1999.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 7. | | SANTOS, N. A. G.; BONATO, P. S.; DREOSSI, S. A. C.; GOMES, M. A. F.; CERDEIRA, A. L.; CARVALHO, D.; LANCHOTE, V. L. Multiresidue method for the analysis of herbicides in surface and groundwater. In: CONGRESS OF PHARMACEUTICAL SCIENCES, 1., 1997, Ribeirao Preto, SP. Bolletino Chimico Farmaceutico, v.136, p.133, 1997. Abstract.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 8. | | TOZZATO, E.; BONATO, P. S.; CERDEIRA, A. L.; GOMES, M. A. F.; CARVALHO, D.; LANCHOTE, V. L.; QUEIROZ, R. H. C. Method for bioassaying ametryne in water. In: CONGRESS OF PHARMACEUTICAL SCIENCES, 1., 1997,Ribeirao Preto, SP. Bollettino Chimico Farmaceutico, v.136, p.49, 1997. Abstract.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 9. | | CERDEIRA, A. L.; LANCHOTE, V. L.; QUEIROZ, R. C.; BONATO, P. S.; GOMES, M. A. F.; PESSOA, M. C. P. Y.; UETA, J. Herbicides residues in soil and water from sugarcane area in Brazil. In: INTERNATIONAL CONFERENCE ON SUSTAINABLE AGRICULTURE IN TROPICAL AND SUBTROPICAL HIGHLANDS WITH SPECIAL REFERENCE TO LATIN AMERICA, 1998, Rio de Janeiro. Abstracts. Rio de Janeiro: INT / EMBRAPA-CNPS / University of Karlsruhe, 1998. 7 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 10. | | SANTOS, N. A. G.; LANCHOTE, V. L.; DREOSSI, S. A. C.; GOMES, M. A. F.; CERDEIRA, A. L.; CARVALHO, D.; BONATO, P. S. GC-MS determination of chlorotriazines in aqueous environmental samples. In: CONGRESS OF PHARMACEUTICAL SCIENCES, 1., 1997, Ribeirao Preto, SP. Bolletino Chimico Farmaceutico, v.136, p.131, 1997. Abstract.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 11. | | DREOSSI, S. A. C.; LANCHOTE, V. L.; SANTOS, N. A. G.; CERDEIRA, A. L.; GOMES, M. A. F.; CARVALHO, D.; BONATO, P. S. GC-MS method for the determination of tebuthiuron in water. In: CONGRESS OF PHARMACEUTICAL SCIENCES, 1., 1997, Ribeirao Preto, SP. Bollettino Chimico Farmaceutico,v. 136, p.132, 1997. Abstract.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 12. | | SANTOS, A. C.; LANCHOTE, V. L.; BONATO, P. S.; QUEIROZ, R. H. C.; SANTOS, N. A. G.; CERDEIRA, A. L.; CARVALHO, D. Quantificação de resíduos do 2,4 D em amostras de água por cromatografia a gás. Revista Brasileira de Toxicologia, v.6, 1993. Suplemento. n.p.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 13. | | SANTILI, M. B.; LANCHOTE, V. L.; BONATO, P. S.; SANTOS, A. C.; QUEIROZ, R. N. C.; CERDEIRA, A. L.; CARVALHO, D. Quantificação de resíduos de 2,4 D em amostras de água por cromatografia liquida de alta eficiencia. Revista Brasileira de Toxicologia, v.6, 1993. Suplemento. n.p.| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 13 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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