Anodic stripping voltammetric determination of Se(IV) by means of a novel reusable gold microelectrodes array

Anodic Stripping Voltammetric Procedure of Thallium(I) Determination by Means of a Bismuth-Plated Gold-Based Microelectrode Array

“…Preliminary experiments show that for the preconcentration and determination of thallium(I) by anodic stripping voltammetry, a bismuth-plated gold-based microelectrode array can be successfully utilized. The mentioned solid gold microelectrode array was previously used in the case of selenium(IV) determination without any metal plating steps [ 48 ]. In the studies presented below, the use of this microelectrode array as a substrate for a bismuth film was described.…”

“…The presented article demonstrates the utilization of a new voltammetric working electrode—a solid gold microelectrode array. The mentioned working electrode previously proposed in [ 48 ] was used for the first time as a substrate for a bismuth film and utilized for the determination of thallium ions by anodic stripping voltammetry. The results presented in these studies indicate that the mentioned array of microelectrodes is an excellent substrate for bismuth film that can be successfully applied for thallium(I) determination by anodic stripping voltammetry.…”

“…The electrochemical cell had a volume of 10 mL. A detailed description of the construction of an array of gold microelectrodes was given in [ 48 ]. Briefly, for fabrication of the array of gold microelectrodes, a homemade silica preform containing 792 holes was used.…”

“…Recently, a new type of gold microelectrode array with an extended lifetime, due to the way it is designed, has been proposed [ 48 ]. Gold is a popular and frequently used electrode material due to the following benefits it provides: fast electron transfer kinetics, high conductivity, its potential window with a relatively wide anodic range, reduced risk of corrosion resulting from a low reactivity in the supporting electrolyte, and its environmentally friendly character.…”

“…The present article demonstrates the use of a new voltammetric sensor based on a reusable gold microelectrode array for thallium ion quantification via anodic stripping voltammetry. The solid gold microelectrode array reported for the first time in [ 48 ] was modified with bismuth film to meet some specific requirements regarding thallium(I) determinations. During the investigations described below, it was observed that the presented microelectrode array is an excellent substrate for metal film pre-plating.…”