TOTAL NITROGEN DETERMINATION IN AMMONIACAL, AMIDIC AND NITRATE NITROGEN CONTAINING FERTILIZERS BY THE RANEY CATALYST METHOD

Raquel Nogueira, Orlando Santos Neto, Rafael Martins Lourenço, Claudia Oliveira Sena, Carlos Magno Wonghan da Silva

Resumo


This paper presents the optimized conditions for the determination of total nitrogen in ammoniacal, amidic, and nitrate nitrogen containing fertilizers by the Raney catalyst method using a Buchi K-436 speed digester and a Buchi K-360 distillation unit.


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Referências


ABRAMS, D., METCALF, D.; HOJJATIE, M. 2014. Determination of Kjeldahl nitrogen in fertilizers by AOAC official method SM 978.02: Effect of copper sulfate as a catalyst. Journal of the AOAC International, Oxford, v.97, p.764-767.

BABRAUSKAS, V. 2016. Explosions of ammonium nitrate fertilizer in storage or transportation are preventable accidents. Journal of Hazardours Materials, Amsterdam, v.304, p.134-149.

BARKER, A. V.; VOLK, R. J. 1964. Determination of ammonium, amide, amino, and nitrate nitrogen in plant extracts by a modified Kjeldahl method. Analytical Chemistry, Washington D. C., v.36, n.2, p.439-439.

BRABSON, J. A.; BURCH, W. G. Jr. 1964. Reduction of nitrates in acid medium with Raney catalyst powders. Journal of the Association of the Official Analytical Chemists, Oxford, v.47, n.6, p.1035-1040.

BRABSON, J. A.; WOODIS Jr, T. C. 1969. A new approach to the Raney catalyst powder method for total nitrogen in fertilizers. Journal of the Association of the Official Analytical Chemists, Oxford, v.52, n.1, p.23-30.

CAMPBELL, W. R.; HANNA, M. I. 1937. The determination of nitrogen by modified Kjeldahal methods. Journal of Biological Chemistry, Rockville, v.119, p.1-7.

DICKINSON, W. E. 1954. Kjeldahl method as applied to the determination of nitrogen in nitrates. Analytical Chemistry, Washington D. C., v.26, n.4, p.777-779.

HILLER, A.; PLAZIN, J.; VAN SLYKE, D. D. 1948. A study of conditions for Kjeldahl determination of nitrogen in proteins; description of methods with mercury as catalyst, and titrimetric and gasometric measurements of the ammonia formed. Journal of Biological Chemistry, Rockville, v.176, p.1401-1420.

JOHNSON, F. J.; MILLER, D. L. 1974. Alkaline distillation of ammoniacal and nitrate nitrogen with Raney catalyst powder. Journal of the Association of the Official Analytical Chemists, Oxford, v.57, n.1, p.8-9.

JOHNSON, F. J.; WOODIS, T. C.; CUMMINGS Jr., J. M. 1974. Mercury-free Raney catalyst method for total nitrogen in fertilizers. Journal of the Association of the Official Analytical Chemists, Oxford, v.57, n.1, p.10-13.

KANE, P. F. 1986. CuSO4-TiO2 as Kjeldahl digestion catalyst in manual determination of crude protein in animal feeds. Journal of the Association of the Official Analytical Chemists, Oxford, v.69, n.4, p.664-666.

KIRK, P. L. 1950. Kjeldahl method for total nitrogen. Analytical Chemistry, Washington D. C., v.22, n.2, p.354-358.

McKENZIE, H. A. 1994. The Kjeldahl determination of nitrogen: Retrospect and prospect. Trends in Analytical Chemistry, Amsterdam, v.13, n.4, p.138-144.

Ministério da Agricultura, Pecuária e Abastecimento (MAPA). Secretaria de Defesa Agropecuária (SDA). Manual de Métodos Analíticos Oficiais para Fertilizantes e Corretivos. Instrução normativa No. 13, de 15 de julho de 2015. Brasília: MAPA, 2017.

Ministério da Agricultura, Pecuária e Abastecimento (MAPA). Secretaria de Defesa Agropecuária (SDA). Instrução normativa No. 37, de 13 de outubro de 2017. Brasília: Diário Oficial da União, 13 de outubro de 2017.

RANKER, E. R. 1926. Determination of total nitrogen, nitrate-nitrogen, and total nitrogen not including nitrate-nitrogen: further observations on a modification of the official salicylic-thiosulphate method. Annals of the Missouri Botanical Garden, St. Louis, v.13, n.4, p.391-424.

SÁEZ-PLAZA, P.; MICHALOWSKI, T.; NAVAS, M. J.; ASUERO, A. G.; WYBRANIEC, S. 2013. An overview of the Kjeldahl method of nitrogen determination. Part I. Early history, chemistry of the procedure, and titrimetric finish. Critical Reviews in Analytical Chemistry, Abindon-on-Thames, v.43, n.4, p.178-223.

SAH, R. N. 1994. Nitrate-nitrogen determination: a critical review. Communications in Soil Science and Plant Analysis, Abindon-on-Thames, v.25, p.2841-2869.




DOI: https://doi.org/10.37856/bja.v97i2.4307

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