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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
29/03/2017 |
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Data da última atualização: |
25/01/2018 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
QUEIROZ, S. C. do N. de; ASSALIN, M. R.; BRIGHENTI, A. M. |
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Afiliação: |
SONIA CLAUDIA DO N DE QUEIROZ, CNPMA; MARCIA REGINA ASSALIN, CNPMA; ALEXANDRE MAGNO B DOS SANTOS, CNPGL. |
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Título: |
Determination of metsulfuron-methyl residues in elephant grass by using (LC/ESI)-Q-ToF-MS/MS (813). |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: INTERNATIONAL WEED SCIENCE CONGRESS, 7., 2016, Prague. Weed science and managemente to feed the planet: proceedings. [Prague: Czech Weed Research Society: Czech University of Life Sciences Prague, 2016]. p. 421. |
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Idioma: |
Inglês |
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Conteúdo: |
Elephant grass has been used as animal feed and also in diff erent applications, such as, to protect arid land from soil erosion, to improve the fertility of soil, to use as fi rebreaks and windbreaks, and to produce bio-oil, alcohol and charcoal. However, one of the its limitation in fi eld implantation in large scale is the interference of weeds. In order to control the infestation of weeds the application of herbicides has been showed to be an eff ective method, but due to the toxicity of these substances for the environment and animals, the presence of the herbicides residues in plants must be evaluated. Thus, this work presents an analytical method, which was developed to determine the residues of metsulfuron-methyl in elephant grass by using Liquid chromatography coupled to a quadruplole time-of-fl ight tandem mass spectrometry (LC/ESI)- Q-ToF-MS/MS. The extraction of the analyte was made by using the QuEChERS method (quick, easy, cheap, eff ective, rugged and safe). In the clean-up step, besides PSA and MgSO4, florisil was also used to remove the interferents. The separation was carried out on an Acquity UPLC® BEH C18 column (1.7 ?m, 2.1mm ID, 100mm) using a gradient elution profi le and mobile phase consisting of 0.1 % formic acid in water and methanol (positive-ion mode). The method showed good linearity in the concentration range of 0.001?0.2 ?g/mL, (r2 ? 0.99); the limit of quantifi cation (LOQ) was 20 ?g/kg-1; the recoveries were in the range of 93?120% and the precision (RSD%) was 12.7 %. The method was applied to analyze samples collected after 45 d after treatment with metsulfuron-methyl (7.8 and 15.6 g ha-1) and an untreated check. None of the sample showed the presence of the herbicide residues above of the limit of quantifi cation (LOD). Acknowledgements: Financial support of CNPq and FAPEMIG is highly acknowledged. MenosElephant grass has been used as animal feed and also in diff erent applications, such as, to protect arid land from soil erosion, to improve the fertility of soil, to use as fi rebreaks and windbreaks, and to produce bio-oil, alcohol and charcoal. However, one of the its limitation in fi eld implantation in large scale is the interference of weeds. In order to control the infestation of weeds the application of herbicides has been showed to be an eff ective method, but due to the toxicity of these substances for the environment and animals, the presence of the herbicides residues in plants must be evaluated. Thus, this work presents an analytical method, which was developed to determine the residues of metsulfuron-methyl in elephant grass by using Liquid chromatography coupled to a quadruplole time-of-fl ight tandem mass spectrometry (LC/ESI)- Q-ToF-MS/MS. The extraction of the analyte was made by using the QuEChERS method (quick, easy, cheap, eff ective, rugged and safe). In the clean-up step, besides PSA and MgSO4, florisil was also used to remove the interferents. The separation was carried out on an Acquity UPLC® BEH C18 column (1.7 ?m, 2.1mm ID, 100mm) using a gradient elution profi le and mobile phase consisting of 0.1 % formic acid in water and methanol (positive-ion mode). The method showed good linearity in the concentration range of 0.001?0.2 ?g/mL, (r2 ? 0.99); the limit of quantifi cation (LOQ) was 20 ?g/kg-1; the recoveries were in the range of 93?120% and the p... Mostrar Tudo |
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Palavras-Chave: |
Forrageira. |
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Thesagro: |
Herbicida; Pennisetum purpureum. |
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Thesaurus Nal: |
Forage; Herbicides. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/161164/1/2016RA-002.pdf
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Marc: |
LEADER 02626nam a2200193 a 4500
001 2067795
005 2018-01-25
008 2016 bl uuuu u00u1 u #d
100 1 $aQUEIROZ, S. C. do N. de
245 $aDetermination of metsulfuron-methyl residues in elephant grass by using (LC/ESI)-Q-ToF-MS/MS (813).$h[electronic resource]
260 $aIn: INTERNATIONAL WEED SCIENCE CONGRESS, 7., 2016, Prague. Weed science and managemente to feed the planet: proceedings. [Prague: Czech Weed Research Society: Czech University of Life Sciences Prague, 2016]. p. 421.$c2016
520 $aElephant grass has been used as animal feed and also in diff erent applications, such as, to protect arid land from soil erosion, to improve the fertility of soil, to use as fi rebreaks and windbreaks, and to produce bio-oil, alcohol and charcoal. However, one of the its limitation in fi eld implantation in large scale is the interference of weeds. In order to control the infestation of weeds the application of herbicides has been showed to be an eff ective method, but due to the toxicity of these substances for the environment and animals, the presence of the herbicides residues in plants must be evaluated. Thus, this work presents an analytical method, which was developed to determine the residues of metsulfuron-methyl in elephant grass by using Liquid chromatography coupled to a quadruplole time-of-fl ight tandem mass spectrometry (LC/ESI)- Q-ToF-MS/MS. The extraction of the analyte was made by using the QuEChERS method (quick, easy, cheap, eff ective, rugged and safe). In the clean-up step, besides PSA and MgSO4, florisil was also used to remove the interferents. The separation was carried out on an Acquity UPLC® BEH C18 column (1.7 ?m, 2.1mm ID, 100mm) using a gradient elution profi le and mobile phase consisting of 0.1 % formic acid in water and methanol (positive-ion mode). The method showed good linearity in the concentration range of 0.001?0.2 ?g/mL, (r2 ? 0.99); the limit of quantifi cation (LOQ) was 20 ?g/kg-1; the recoveries were in the range of 93?120% and the precision (RSD%) was 12.7 %. The method was applied to analyze samples collected after 45 d after treatment with metsulfuron-methyl (7.8 and 15.6 g ha-1) and an untreated check. None of the sample showed the presence of the herbicide residues above of the limit of quantifi cation (LOD). Acknowledgements: Financial support of CNPq and FAPEMIG is highly acknowledged.
650 $aForage
650 $aHerbicides
650 $aHerbicida
650 $aPennisetum purpureum
653 $aForrageira
700 1 $aASSALIN, M. R.
700 1 $aBRIGHENTI, A. M.
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