SANTOS, J. S. . .; REIS, C. .; REIS, E. L.; JESUS, R. M. de .; REIS, L. G. T. dos .; MATIAS, A. A. . Determination of ammoniacal nitrogen in samples of food, soil, fertilizers and water based on the reaction with formaldehyde. The Journal of Engineering and Exact Sciences, Viçosa/MG, BR, v. 6, n. 5, p. 0647–0654, 2020. DOI: 10.18540/jcecvl6iss5pp0647-0654. Disponível em: https://periodicos.ufv.br/jcec/article/view/11334. Acesso em: 26 apr. 2024.