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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
22/12/1999 |
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Autoria: |
VAZ, C. M. P.; MACHADO, S. A. S.; MAZO, L. H.; AVACA, L. A.; TRAGHETTA, D. G.; MARTIN NETO, L.; VIEIRA, E. M.; CRESTANA, S. |
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Afiliação: |
EMBRAPA-CNPDIA; USP-IQSC. |
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Título: |
Adsorption studies of atrazine on soils using differential pulse polarography. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: ANNUAL MEETING OF THE INTERNATIONAL SOCIETY OF ELECTROCHEMISTRY, 47., Sept. 1996, Veszprem, Hungria. Abstracts... Veszprem: International Society of Electrochemistry, 1996. |
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Páginas: |
p. P3a-1. |
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Idioma: |
Inglês |
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Conteúdo: |
Atrazine (2-Chloro-4-ethylamine-6-isopropylamine-1,3,5-triazine) is one of the pre-emergent herbicides most widely used in the world and has frequently been found as a contaminant in surface and ground waters. The main technique used for atrazine determination is gas chromatography, but in some cases liquid and thin layer methodologies have been employed. On the other hand, electroanalytical techniques such as voltammetry and polarography have also been used [1]. In comparison with gas chromatography, the electroanalytical procedures are faster, cheaper and easier to be carried out. Moreover,they can be successfully employed for the analysis of colored materials or samples containing dispersed solid particles. The disadvantages are, in some cases, related to lower selectivity and sensitivity. The purpose of this work is to study the adsorption of atrazine in samples of tropical soils using Differential Pulse Polarography (DPP) to analyse atrazine concentrations in soil solutions. Electrochemical measurements were carried out in a EG&G PAR mod. 348B Polarographic Analyzer, connected with a mod. 303A mercury electrode. The experimental conditions are given elsewhere [1]. Batch equilibrium studies were carried out at 25 celsius degree using three types of tropical soils. They were agitated during 24 hours with atrazine concentrations varying between 0.1 and 20 microgr.ml-1. The samples were then centrifuged, to separate soil solution from the soil, and analysed directly by DPP... MenosAtrazine (2-Chloro-4-ethylamine-6-isopropylamine-1,3,5-triazine) is one of the pre-emergent herbicides most widely used in the world and has frequently been found as a contaminant in surface and ground waters. The main technique used for atrazine determination is gas chromatography, but in some cases liquid and thin layer methodologies have been employed. On the other hand, electroanalytical techniques such as voltammetry and polarography have also been used [1]. In comparison with gas chromatography, the electroanalytical procedures are faster, cheaper and easier to be carried out. Moreover,they can be successfully employed for the analysis of colored materials or samples containing dispersed solid particles. The disadvantages are, in some cases, related to lower selectivity and sensitivity. The purpose of this work is to study the adsorption of atrazine in samples of tropical soils using Differential Pulse Polarography (DPP) to analyse atrazine concentrations in soil solutions. Electrochemical measurements were carried out in a EG&G PAR mod. 348B Polarographic Analyzer, connected with a mod. 303A mercury electrode. The experimental conditions are given elsewhere [1]. Batch equilibrium studies were carried out at 25 celsius degree using three types of tropical soils. They were agitated during 24 hours with atrazine concentrations varying between 0.1 and 20 microgr.ml-1. The samples were then centrifuged, to separate soil solution from the soil, and analysed directly by DPP.... Mostrar Tudo |
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Palavras-Chave: |
Agricultural instrumentation; Differential pulse polarography; DPP; Herbicidas; Instrumentacao agropecuaria. |
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Thesagro: |
Adsorção; Atrazina. |
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Thesaurus Nal: |
adsorption; atrazine; herbicides. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02535naa a2200337 a 4500
001 1027075
005 1999-12-22
008 1996 bl --- 0-- u #d
100 1 $aVAZ, C. M. P.
245 $aAdsorption studies of atrazine on soils using differential pulse polarography.
260 $c1996
300 $ap. P3a-1.
520 $aAtrazine (2-Chloro-4-ethylamine-6-isopropylamine-1,3,5-triazine) is one of the pre-emergent herbicides most widely used in the world and has frequently been found as a contaminant in surface and ground waters. The main technique used for atrazine determination is gas chromatography, but in some cases liquid and thin layer methodologies have been employed. On the other hand, electroanalytical techniques such as voltammetry and polarography have also been used [1]. In comparison with gas chromatography, the electroanalytical procedures are faster, cheaper and easier to be carried out. Moreover,they can be successfully employed for the analysis of colored materials or samples containing dispersed solid particles. The disadvantages are, in some cases, related to lower selectivity and sensitivity. The purpose of this work is to study the adsorption of atrazine in samples of tropical soils using Differential Pulse Polarography (DPP) to analyse atrazine concentrations in soil solutions. Electrochemical measurements were carried out in a EG&G PAR mod. 348B Polarographic Analyzer, connected with a mod. 303A mercury electrode. The experimental conditions are given elsewhere [1]. Batch equilibrium studies were carried out at 25 celsius degree using three types of tropical soils. They were agitated during 24 hours with atrazine concentrations varying between 0.1 and 20 microgr.ml-1. The samples were then centrifuged, to separate soil solution from the soil, and analysed directly by DPP...
650 $aadsorption
650 $aatrazine
650 $aherbicides
650 $aAdsorção
650 $aAtrazina
653 $aAgricultural instrumentation
653 $aDifferential pulse polarography
653 $aDPP
653 $aHerbicidas
653 $aInstrumentacao agropecuaria
700 1 $aMACHADO, S. A. S.
700 1 $aMAZO, L. H.
700 1 $aAVACA, L. A.
700 1 $aTRAGHETTA, D. G.
700 1 $aMARTIN NETO, L.
700 1 $aVIEIRA, E. M.
700 1 $aCRESTANA, S.
773 $tIn: ANNUAL MEETING OF THE INTERNATIONAL SOCIETY OF ELECTROCHEMISTRY, 47., Sept. 1996, Veszprem, Hungria. Abstracts... Veszprem: International Society of Electrochemistry, 1996.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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