TOTAL NITROGEN DETERMINATION IN AMMONIACAL, AMIDIC AND NITRATE NITROGEN CONTAINING FERTILIZERS BY THE RANEY CATALYST METHOD
DOI:
https://doi.org/10.37856/bja.v97i2.4307Abstract
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.References
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 AnalÃticos Oficiais para Fertilizantes e Corretivos. Instrução normativa No. 13, de 15 de julho de 2015. BrasÃlia: MAPA, 2017.
Ministério da Agricultura, Pecuária e Abastecimento (MAPA). Secretaria de Defesa Agropecuária (SDA). Instrução normativa No. 37, de 13 de outubro de 2017. BrasÃlia: 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.
SÃEZ-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.
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