A thick-film graphite-containing electrode modified with formazan for determining manganese in natural and drinking waters by stripping voltammetry

Abstract

A mercury-free thick-film graphite-containing electrode modified with formazan is proposed for determining manganese(II) by cathodic stripping voltammetry. The detection limit for manganese(II) found with this electrode is 0.04 µ g/L at a preconcentration time of 60 s. The analytical signal from manganese(II) is a linear function of its concentration in the range 0.1 to 30 µ g/L. The results of determining manganese in natural and drinking waters are presented.

Trace manganese detection via differential pulse cathodic stripping voltammetry using disposable electrodes: additively manufactured nanographite electrochemical sensing platforms

“…11 However, although these techniques present high sensitivity for manganese determination, they present drawbacks such as high cost, being highly specialized, need for preconcentration and/or separation and the non-feasibility of carrying out in-loco analyses. 3,4,12,13 Alternatively, electroanalytical methodologies, such as stripping voltammetry, can be applied for the determination of trace levels of manganese due to the selective, sensitive, rapid and portable nature of the techniques. 14 Anodic stripping voltammetry (ASV) can be applied for the determination of manganese(II) using mercury and bismuth-modified electrodes; 6,15 this is based upon manganese deposition at the working electrode surface and subsequent anodic redissolution of the deposited manganese (Mn 0 ).…”

“…Electrochemical methods for manganese detection have been reported previously. 2,3,6,[12][13][14][18][19][20][21][22][23][24][25][26] For instance, Rusinek and colleagues 2 developed a new sensor based on polymercoated indium tin oxide for manganese detection in natural water samples. Kang et al 3 utilized a copper-based electrochemical sensor with a palladium electrode to determine manganese in water samples.…”

Environment‐friendly electrodes using biopolymer chitosan/poly ortho aminophenol with enhanced electrochemical behavior for use in energy storage devices

“…Chitosan, poly‐[β‐1‐4]‐2‐amino‐2‐deoxy‐ d ‐glucopyranose (CTS), is one of the most plentiful natural polymers that can form stable chelates with many transition metal ions within the hydroxyl and amino groups. CTS and its derivatives have been applied for electrochemical determination of silver, platinum, palladium, gold, lead, copper, mercury, and pretreated Glassy carbon electrode (GCE) which coated by thin CTS film . By adding mentioned biopolymer in the surface of the working electrode, the electrochemical performance and mechanical stability of the deposited conductive polymer in surface of working electrode can be enhanced.…”