SINGMASTER, III, J. A. Contaminants in aged pesticide grade dichloromethane interfering in herbicide residue analysis and a method for their removal. The Journal of Agriculture of the University of Puerto Rico, [S. l.], v. 75, n. 4, p. 329–344, 1991. DOI: 10.46429/jaupr.v75i4.3619. Disponível em: https://revistas.upr.edu/index.php/jaupr/article/view/3619. Acesso em: 25 jun. 2022.