Horta, Daniela G. [UNESP]Bevilaqua, Denise [UNESP]Acciari, Heloisa Andréa [UNESP]Garcia Júnior, Oswaldo[UNESP]Benedetti, Assis Vicente [UNESP]2014-05-202014-05-202009-01-01Química Nova. Sociedade Brasileira de Química, v. 32, n. 7, p. 1734-1738, 2009.0100-4042http://hdl.handle.net/11449/25498The use of carbon paste electrodes (CPE) of mineral sulfides can be useful for electrochemical studies to overcome problems by using massive ones. Using CPE-chalcopyrite some variables were electrochemically evaluated. These variables were: (i) the atmosphere of preparation (air or argon) of CPE and elapsed time till its use; (ii) scan rate for voltammetric measurements and (iii) chalcopyrite concentration in the CPE. Based on cyclic voltammetry, open-circuit potential and electrochemical impedance results the recommendations are: oxygen-free atmosphere to prepare and kept the CPE until around two ours, scan rates from 10 to 40 mV s-1, and chalcopyrite concentrations > 20%.1734-1738engcarbon paste electrodes (CPE)chalcopyriteleachingArtigo10.1590/S0100-40422009000700010S0100-40422009000700010WOS:000271424900010Acesso abertoS0100-40422009000700010.pdf