OJEDA, C. Bosch; ROJAS, F. Sanchez; PAVON, J.M. Cano. PRECONCENTRATION OF COPPER FROM DIFFERENT SAMPLES BY DISPERSIVE LIQUID-LIQUID MICROEXTRACTION. European Scientific Journal, ESJ, [S. l.], v. 9, n. 18, 2013. DOI: 10.19044/esj.2013.v9n18p%p. Disponível em: https://test.eujournal.org/index.php/esj/article/view/1182. Acesso em: 19 apr. 2025.