“…As an expected outcome, the wide field of application of the CPE is still growing mainly due to a combination of interesting features such as low manufacturing costs offset by a wide potential window, ease of preparation and a surface that is modifiable without having to use other contaminating chemical species; these have turned them into selective, versatile and renewable analytical devices [6]. Modification of the CPE electrodes can be effected by means of a mix of electroactive compounds [4,5,7,8,9,10], by adsorption or electrodeposition [11,12]. To get a response similar to that of the HDME a CPE has been modified with Hg electrodeposits to determine Pb(II) obtaining low detection limits (2.5×10 -9 M with a t d =10 min) [12,13,14,15].…”