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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
27/01/1997 |
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Data da última atualização: |
03/04/2017 |
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Autoria: |
ALVES, B. J. R.; BODDEY, R. M.; URQUIAGA, S. S. |
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Título: |
A rapid and sensitive flow injection technique for the analysis of ammonium in soil extracts. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, v.24, n.3/4, p.277-284, 1993. |
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Idioma: |
Inglês |
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Conteúdo: |
The steam distilation technique for the quantification of soil mineral nitrogens is not well adapted to estimate very low levels of NH4+ and NO3- such as those found in tropical pastures. In this paper we describe a flow injection analysis (FIA) technique for the direct estimation of soil ammonium in potassium chloride extracts. The technique is based on the salicylate/hypochloride colorimetric reaction with the resulting colouration read at 647 nm. The speed of the reaction was increased by immersing the reaction coils in a water bath maintained at 70C. The technique was capable of accurately quantifying ammonium to concentrations as low as 0.05 mg NH4+-N/L (equivalent to 0.25 mg NH4+-N/g dry soil) and sample thoughputs of at least 60 samples per hour could be achieved. It was found that amino acids whould also give a positive colorimetric reaction but that in the ten tropical soils examined this was not a significant source of error. |
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Palavras-Chave: |
Ammonium; Amonio; Analysis. |
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Thesagro: |
Análise; Nitrogênio; Nutrição; Solo. |
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Thesaurus Nal: |
nitrogen; nutrition; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01656naa a2200265 a 4500
001 1790324
005 2017-04-03
008 1993 bl --- 0-- u #d
100 1 $aALVES, B. J. R.
245 $aA rapid and sensitive flow injection technique for the analysis of ammonium in soil extracts.
260 $c1993
520 $aThe steam distilation technique for the quantification of soil mineral nitrogens is not well adapted to estimate very low levels of NH4+ and NO3- such as those found in tropical pastures. In this paper we describe a flow injection analysis (FIA) technique for the direct estimation of soil ammonium in potassium chloride extracts. The technique is based on the salicylate/hypochloride colorimetric reaction with the resulting colouration read at 647 nm. The speed of the reaction was increased by immersing the reaction coils in a water bath maintained at 70C. The technique was capable of accurately quantifying ammonium to concentrations as low as 0.05 mg NH4+-N/L (equivalent to 0.25 mg NH4+-N/g dry soil) and sample thoughputs of at least 60 samples per hour could be achieved. It was found that amino acids whould also give a positive colorimetric reaction but that in the ten tropical soils examined this was not a significant source of error.
650 $anitrogen
650 $anutrition
650 $asoil
650 $aAnálise
650 $aNitrogênio
650 $aNutrição
650 $aSolo
653 $aAmmonium
653 $aAmonio
653 $aAnalysis
700 1 $aBODDEY, R. M.
700 1 $aURQUIAGA, S. S.
773 $tCommunications in Soil Science and Plant Analysis$gv.24, n.3/4, p.277-284, 1993.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| 1. |  | ANGELINI, M. E.; FONTANA, A.; LANDI, A.; MERMUT, A. R.; MOREIRA, A. L.; LOPATKA, A.; LABAZ, B.; IRINA, B.; VANDENBYGAART, B.; OLGA, B.; PÁLKA, B.; SMRECZAK, B.; CLERICI, C.; PINHEIRO JÚNIOR, C. R.; FERGUSON, C.; OLGA, C.; VAN HUYSSTEEN, C. W.; MONGER, C.; WEI, D.; RODRÍGUEZ, D. M.; LINDBO, D.; NURSYAMSI, D.; CAHYANA, D.; BEAUDETTE, D.; NUREMBERG, E.; LIU, F.; FONTES, F.; OLIVEIRA, F. P. de; ZHANG, G.; OLEG, G.; PEREIRA, G.; SCHULZ, G.; VASQUES, G. M.; IAAICH, H.; MORRÁS, H. J. M.; HUSEIN, H. H.; GUTIÉRREZ DÍAZ, J. S.; IVELIC-SÁEZ, J.; KOBZA, J.; FUENTE, J. C. de la; HE, J.; NIKOLAI, K.; RODRÍGUEZ JIMÉNEZ, L. M.; WANG, L.; TENTI VUEGEN, L.; JIN, L.; MORETTI, L. M.; ANJOS, L. H. C. dos; SANTOS, L. A. C. dos; PFEIFFER, M.; PEREIRA, M. G.; GUEVARA SANTAMARIA, M.; BOLAÑOS-BENAVIDES, M.; DELL'ACQUA, M.; SAKSA, M.; COELHO, M. R.; CAMPOS, M. C. C.; NEVENA, M.; ORDOÑEZ DELGADO, N.; BATKHISHIG, O.; SERRATO ALCAREZ, P. K.; MOUSSSADEK, R.; DART, R. de O.; DALMOLIN, R. S. D.; OROZAKUNOVA, R.; RADIC, S.; TOMA, S.; WILLS, S. A.; ROECKER, S.; VALLE, S.; KIENAST-BROWN, S.; NAKISKO, S.; KUYPER, T. W.; SOLOVEI, V.; IVAN, V.; CHERLINKA, V.; MORA, V. R. de la; LEBED, V.; CARDONA, W. A.; GENG, X.; LI, Y.; ZHANG, Y.; SULAEMAN, Y.; ZALAVSKYI, Y.; YIGINI, Y.; TAKATA, Y.; SUN, Z. Global distribution and characteristics of black soils. In: FAO. Global status of black soils. Rome, 2022. cap. 2, p. 14-69.| Tipo: Capítulo em Livro Técnico-Científico |
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