Double Deposition and Stripping Steps for Trace Determination of Au(III) Using Anodic Stripping Voltammetry

Abstract

A new way of decreasing the detection limit ‐ double deposition and stripping steps was proposed to determine trace amounts of gold(III) by anodic stripping voltammetry. Two carbon composite electrodes that differed drastically in their surface areas were used for the measurements. The calibration graph was linear from 1×10−9 to 1×10−8 mol L−1 following deposition time of 300 s at the first and the second electrode. The detection limit was found to be 2.3×10−10 and 1.4×10−11 mol L−1 for deposition time 600 and 2400 s, respectively. It is the lowest detection limit obtained so far for gold(III) determination in stripping voltammetry.

Sensitive Determination of Folic Acid using a Solid Bismuth Microelectrode by Adsorptive Stripping Voltammetry

“…Furthermore, using microelectrodes leads in many cases to favorable signal to noise ratio [35]. For the construction of microelectrodes metallic electrode materi-als [36][37][38][39][40] as well as various carbon materials and composites were utilized [41][42][43][44] and many different geometries of microelectrodes were proposed [45].…”

Double deposition/accumulation and double stripping steps system as a new way of decreasing the detection limit and elimination of interferences in stripping voltammetry of inorganic ions: A review

“…The subject of this article is reviewing the results of research concerning the utilization of double deposition/ accumulation and stripping steps as a new way of lowering the detection limit and increase the selectivity of determination of selected ions: (Pb(II), Cd(II), Tl(I), U-(VI), Au(III), As(III), Se(IV), In(III), Co(II), Cu(II), Bi-(III) and Ga(III)) [39][40][41][42][43][44][45][46][47][48][49]. A significant decrease of the detection limits of the procedures of inorganic ions determination discussed below was obtained by omitting the additional step of preconcentration of the analyte outside the electrochemical cell before a proper analysis with the use of the environmentally friendly electrodes (or more environmentally friendly as compared to mercury ones).…”

“…In paper [25] an idea of double deposition and stripping steps similar to the abovementioned procedures [39][40][41][42][43][44][45][46][47][48][49] was utilized for Pb(II) and Cd(II) determination, however, in the mentioned protocol after the first deposition step a polarization of the first electrode was interrupted and then this electrode was quickly transferred to the another electrolytic cell of smaller sizes. During this transfer, the deposited metals had a contact with atmospheric air that might have resulted in a partial oxidation of deposited species.…”

Sensitive Anodic Stripping Voltammetric Copper Ions Determination Performed in Double Deposition and Double Stripping Steps System for Real Water Samples Analysis

“…The research described below demonstrates the utilization of previously proposed double deposition and stripping steps procedure together with square wave ASV for determination of copper traces. Lead film plated on glassy carbon electrode as the first working electrode and ensembles of lead film plated on carbon fibers microelectrodes as the second working electrode were used during the first and the second deposition step, respectively.…”