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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
23/01/2006 |
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Data da última atualização: |
13/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PARRA, A.; RAMON, M; ALONSO, J.; LEMOS, S. G.; VIEIRA, E.; NOGUEIRA, A. R. de A. |
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Afiliação: |
ALEIX PARRA, Universitat Autonoma de Barcelona; MERITXELL R AMON, Universitat Autonoma de Barcelona; JULIAN ALONSO, Universitat Autonoma de Barcelona; SHERLAN G. LEMOS, Universidade Federal de Sao Carlos; EDIVAN C. VIEIRA, Universidade Federal de Sao Carlos; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Flow injection potentiometric system for the simultaneous determination of inositol phosphates and phosphate: phosphorus nutritional evaluation on seeds and grains. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Journal of Agricultural and Food Chemistry, v. 53, p. 7644-7648, 2005. |
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DOI: |
10.1021/jf050226r |
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Idioma: |
Inglês |
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Conteúdo: |
A simple flow injection potentiometric (FIP) system, which uses a tubular cobalt electrode, has been developed for phosphorus nutritional evaluation of seeds and grains. Inorganic phosphorus, Pi, is determined using a 1 × 10-2 mol?L-1 potassium phthalate buffer solution adjusted at pH 4. A sensitivity of 47 mV/decade and an operating range from 10 to 1000 mg?L-1 (1 × 10-4-1 × 10-2 M) of dihydrogen phosphate are obtained. The inositol phosphates amount, which is referred to the organic phosphorus, Porg, is directly determined from extracts using a 1 × 10-2 mol?L-1 Tris-HCl buffer solution adjusted at pH 8. A sensitivity of 127 mV/decade and an operating range of 10-1000 mg?L-1 (2.5 × 10-4-5 × 10-3 M) of Porg (expressed as inositol hexakisphosphoric acid monocalcium) are achieved. Some samples of seed and grain are analyzed by an ICP-OES and a spectrophotometric method to compare results to the developed flow system; no significant differences at the 95% confidence level are observed using a paired t test. Other samples such as animal nursing feed, soybean meal, and corn are also analyzed with the proposed FIP system, showing a good correlation to the ICP-OES values. |
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Palavras-Chave: |
Flow infection; Potentiometric system. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 01920naa a2200217 a 4500
001 1047290
005 2023-03-13
008 2005 bl uuuu u00u1 u #d
024 7 $a10.1021/jf050226r$2DOI
100 1 $aPARRA, A.
245 $aFlow injection potentiometric system for the simultaneous determination of inositol phosphates and phosphate$bphosphorus nutritional evaluation on seeds and grains.$h[electronic resource]
260 $c2005
520 $aA simple flow injection potentiometric (FIP) system, which uses a tubular cobalt electrode, has been developed for phosphorus nutritional evaluation of seeds and grains. Inorganic phosphorus, Pi, is determined using a 1 × 10-2 mol?L-1 potassium phthalate buffer solution adjusted at pH 4. A sensitivity of 47 mV/decade and an operating range from 10 to 1000 mg?L-1 (1 × 10-4-1 × 10-2 M) of dihydrogen phosphate are obtained. The inositol phosphates amount, which is referred to the organic phosphorus, Porg, is directly determined from extracts using a 1 × 10-2 mol?L-1 Tris-HCl buffer solution adjusted at pH 8. A sensitivity of 127 mV/decade and an operating range of 10-1000 mg?L-1 (2.5 × 10-4-5 × 10-3 M) of Porg (expressed as inositol hexakisphosphoric acid monocalcium) are achieved. Some samples of seed and grain are analyzed by an ICP-OES and a spectrophotometric method to compare results to the developed flow system; no significant differences at the 95% confidence level are observed using a paired t test. Other samples such as animal nursing feed, soybean meal, and corn are also analyzed with the proposed FIP system, showing a good correlation to the ICP-OES values.
653 $aFlow infection
653 $aPotentiometric system
700 1 $aRAMON, M
700 1 $aALONSO, J.
700 1 $aLEMOS, S. G.
700 1 $aVIEIRA, E.
700 1 $aNOGUEIRA, A. R. de A.
773 $tJournal of Agricultural and Food Chemistry$gv. 53, p. 7644-7648, 2005.
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