Rapid determination of manganese in wastewaters and seawater by stripping potentiometry

Scollary, Geoffrey R.; Chen, Guo Nan; Cardwell, Terence J.; Vincente-Beckett, Victoria A.

doi:10.1002/elan.1140070416

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…The [Cu 2þ ] in the Cu-IDA buffer solutions and the corresponding electrode potentials were used to develop the linear calibration equation, by which the [Cu 2þ ] in the samples can be calculated. The method in Scollary et al (1995) was adapted to prepare the mercury films. After the calibration, the Cu-ISE was evaluated using a Cu-citrate synthetic solution ( Determination of Cd 21 and Pb 21 by ASV ASV-labile Cd and Pb were measured, which were considered representative of the sum of the free Cd 2þ and Pb 2þ ions and their inorganic complexes (Florence 1986).…”

Section: Determination Of Cu 21 By Isementioning

confidence: 99%

Equilibrium Speciation of Cadmium, Copper, and Lead in Soil Solutions

Sauvé

Hendershot

2005

Communications in Soil Science and Plant Analysis

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Determination of chemical speciation of trace metals may help us to better understand the bioavailability and toxicity to living organisms in terrestrial and aquatic environments. This paper reports the speciation data of cadmium (Cd), copper (Cu), and lead (Pb) in soil solutions sampled from areas around metal smelters. A column ion exchange technique (IET) using a cation exchange resin was applied to determine the concentrations of Cd 2þ , Cu 2þ , and Pb 2þ . It was shown that the pH and the amount of calcium (Ca) in solutions affected the distribution of metal ions to the resin. In the synthetic solutions involving Cl, SO 4 , and citrate, the metal-ligand complexes did not affect the measurement of free metal ions by the IET. In soil solutions, the concentrations of free ions were affected by solution pH, varying within 10 29 -10 27 M for Cd, 10 29 -10 26 M for Cu, and 10 29 -10 27 M for Pb. The IET results were comparable to those measured by Cu-ion selective electrode (ISE) and anodic stripping voltammetry (ASV). These findings suggest that the IET can be applied to soil solutions for metal speciation measurements.

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Section: Determination Of Cu 21 By Isementioning

confidence: 99%

Equilibrium Speciation of Cadmium, Copper, and Lead in Soil Solutions

Sauvé

Hendershot

2005

Communications in Soil Science and Plant Analysis

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“…Scollary, et al used a mercury film working electrode and oxygen (oxidizing agent) for the determination of Mn 2+ in wastewaters and seawater, obtaining a detection limit of 0.5 nM (0.025 ppb). 16 While this work only required a pre-concentration time of 80 s, the requirement of a mercury film makes it less attractive because of toxicity and disposal issues. Zhang, et al used reductive potentiometric stripping analysis on glassy carbon with potassium hexacyanoferrate (reducing agent), achieving a detection limit of 5.0 nM (0.3 ppb).…”

Section: Introductionmentioning

confidence: 99%

“…Stripping potentiometry is similar to stripping voltammetry in that both techniques require a preconcentration/deposition step. However, rather than scanning a potential range to strip the metal off of the electrode surface, potentiometric stripping analysis uses an oxidizing or reducing agent for stripping. − During stripping, the potential of the working electrode is measured as a function of time. The parameter d t /d E is then plotted vs E and changes in d t /d E are proportional to changes in concentration of the analyte.…”

mentioning

confidence: 99%

“…The parameter d t /d E is then plotted vs E and changes in d t /d E are proportional to changes in concentration of the analyte. Scollary et al used a mercury film working electrode and oxygen (oxidizing agent) for the determination of Mn 2+ in wastewaters and seawater, obtaining a detection limit of 0.5 nM (0.025 ppb) . While this work only required a preconcentration time of 80 s, the requirement of a mercury film makes it less attractive because of toxicity and disposal issues.…”

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confidence: 99%

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Bare and Polymer-Coated Indium Tin Oxide as Working Electrodes for Manganese Cathodic Stripping Voltammetry

et al. 2016

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Though an essential metal in the body, manganese (Mn) has a number of health implications when found in excess that are magnified by chronic exposure. These health complications include neurotoxicity, memory loss, infertility in males, and development of a neurologic psychiatric disorder- manganism. Thus, trace detection in environmental samples is increasingly important. Few electrode materials are able to reach the negative reductive potential of Mn required for anodic stripping voltammetry (ASV), so cathodic stripping voltammetry (CSV) has been shown to be a viable alternative. We demonstrate Mn CSV using an indium tin oxide (ITO) working electrode both bare and coated with a sulfonated charge selective polymer film, polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-sulfonate (SSEBS). ITO itself proved to be an excellent electrode material for Mn CSV, achieving a calculated detection limit of 5 nM (0.3 ppb) with a deposition time of 3 min. Coating the ITO with the SSEBS polymer was found to increase the sensitivity and lower the detection limit to 1 nM (0.06 ppb). This polymer modified electrode offers excellent selectivity for Mn as no interferences were observed from other metal ions tested (Zn2+, Cd2+, Pb2+, In3+, Sb3+, Al3+, Ba2+, Co2+, Cu2+, Ni3+, Bi3+, and Sn2+) except Fe2+, which was found to interfere with the analytical signal for Mn2+ at a ratio 20:1 (Fe2+:Mn2+). The applicability of this procedure to the analysis of tap, river, and pond water samples was demonstrated. This simple, sensitive analytical method using ITO and SSEBS-ITO could be applied to a number of electroactive transition metals detectable by CSV.

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“…Adsorptive stripping voltammetry has also been used in manganese determination at both hanging mercury drop [17 Á/21] and glassy carbon [22] electrodes. A potentiometric stripping method has also been developed and applied to waste waters [23].…”

Section: Introductionmentioning

confidence: 99%

Cathodic stripping voltammetry of trace Mn(II) at carbon film electrodes

Filipe

2003

Talanta

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A sensitive voltammetric method is presented for the determination of tract levels of Mn (II) using carbon film electrodes fabricated from carbon resistors of 2 Omega. Determination of manganese was made by square wave cathodic stripping voltammetry (CSV), with deposition of manganese as manganese dioxide. Chronoamperometric experiments were made to study MnO(2) nucleation and growth. As a result, it was found to be necessary to perform electrode conditioning at a more positive potential to initiate MnO(2) nucleation. Under optimised conditions the detection limit obtained was 4 nM and the relative standard deviation for eight measurements of 0.22 nM was 5.3%. Interferences from various metal ions on the response CSV of Mn(II) were investigated, namely Cd(II), Ni(II), Cu(II), Cr(VI), Pb(II), Zn(II) and Fe(II). Application to environmental samples was demonstrated.

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Rapid determination of manganese in wastewaters and seawater by stripping potentiometry

Cited by 9 publications

References 8 publications

Equilibrium Speciation of Cadmium, Copper, and Lead in Soil Solutions

Equilibrium Speciation of Cadmium, Copper, and Lead in Soil Solutions

Bare and Polymer-Coated Indium Tin Oxide as Working Electrodes for Manganese Cathodic Stripping Voltammetry

Cathodic stripping voltammetry of trace Mn(II) at carbon film electrodes

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