Simultaneous Determination of Nickel and Cobalt in Natural Water and Sediment Samples on an in-situ Plated Mercury Film Electrode by Adsorptive Cathodic Stripping Voltammetry

Adeloju, Samuel B O; Hadjichari, Andrew

doi:10.2116/analsci.15.95

Cited by 20 publications

(6 citation statements)

References 17 publications

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“…The interfacial accumulation (preconcentration) of analyte provides the basis for a signifycantly improved detection limit. With dimethylglyoxime (DMG) as Ni 2þ -selective ligand, Ni 2þ concentrations as low as 0.17 nM on mercury film and 4.4 nM on bismuth film electrodes have been shown to become assessable by AdSV in conjunction with differential pulse voltammetry (DPV) [9,10].…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni²⁺ Ion Release from Corroding NiTi Shape Memory Alloys

2006

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Cathodic adsorptive stripping voltammetry (AdSV) as highly sensitive and selective method for quantifying trace amounts of dissolved Ni 2þ -ions has been integrated into an electrochemical robotic device using the wells of microtiter plates as low-volume electrochemical cells. A three-electrode assembly integrating a Bismuth film-modified glassy carbon electrode as working electrode and a glass capillary for delivering Ni 2þ standard solution in conjunction with an adapted software allowed multiple AdSV measuring cycles to be performed one after the other in the individual compartments of a 24-well microtiter plate. Of advantage for the automation was the possibility of an in-well electrochemical removal of used and a replating of fresh Bi films in between distinct measuring cycles. With optimized parameters for the accumulation of the complex between Ni 2þ -ions and dimethylglyoxime onto the surface of the Bi film electrode and the subsequent stripping procedure, automated adsorptive stripping voltammetry in the established system offered a linear dynamic range of up to 170 nM, a sensitivity of 12 nA/nM Ni 2þ and a limit of of detection of 2.1 nM (N ¼ 16) for the detection of trace levels of Ni 2þ -ions. Automated AdSV certainly is of convenience for studying larger number of samples due to the high-throughput capability of the robotic apparatus. As example, the automatic quantification of Ni 2þ -ion release from electropolished surfaces of NiTi shape memory alloys during corrosion in NaCl solutions is described.

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Section: Introductionmentioning

confidence: 99%

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni²⁺ Ion Release from Corroding NiTi Shape Memory Alloys

2006

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“…The in situ MFE is prepared by adding a definite volume of basic mercuric nitrate solution directly to the sample solution and simultaneously depositing the mercury and the measured compound [29,36]. Drug molecules are then anodically stripped from the mercury thin film by scanning Osteryoung square-wave positive potential from −1.8-0.0 V at pH 7.7.…”

Section: Recommended Proceduresmentioning

confidence: 99%

Osteryoung square wave stripping voltammetry at mercury film electrode for monitoring ultra trace levels of Tarabine PFS and its interaction with ssDNA

El‐Hady

Abdelhamid

Seliem

et al. 2004

Journal of Pharmaceutical and Biomedical Analysis

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“…Mercury film (MF) [ 25 , 26 ], lead film (LF) [ 11 , 15 , 27 ] and bismuth film (BF) [ 28 , 29 , 30 , 31 ] electrodes, prepared by ex-situ and in-situ plating techniques have been widely employed as alternatives to the highly toxic hanging mercury drop electrodes (HMDE) and their development for analytical applications is still of great interest. While more environmentally friendly and of lower toxic nature, the MFE, LFE and BFE still pose toxic effects in the environment, owing to their non-biodegradable nature.…”

Section: Introductionmentioning

confidence: 99%

Complexation-Based Detection of Nickel(II) at a Graphene-Chelate Probe in the Presence of Cobalt and Zinc by Adsorptive Stripping Voltammetry

Pokpas

Jahed

Baker

et al. 2017

Sensors

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The adsorptive stripping voltammetric detection of nickel and cobalt in water samples at metal film electrodes has been extensively studied. In this work, a novel, environmentally friendly, metal-free electrochemical probe was constructed for the ultra-trace determination of Ni2+ in water samples by Adsorptive Cathodic Stripping Voltammetry (AdCSV). The electrochemical platform is based on the adsorptive accumulation of Ni2+ ions directly onto a glassy carbon electrode (GCE) modified with dimethylglyoxime (DMG) as chelating agent and a Nafion-graphene (NGr) nanocomposite to enhance electrode sensitivity. The nafion-graphene dimethylglyoxime modified glassy carbon electrode (NGr-DMG-GCE) shows superior detection capabilities as a result of the improved surface-area-to-volume ratio and enhanced electron transfer kinetics following the incorporation of single layer graphene, while limiting the toxic effects of the sensor by removal of the more common mercury, bismuth and lead films. Furthermore, for the first time the NGr-DMG-GCE, in the presence of common interfering metal ions of Co2+ and Zn2+ demonstrates good selectivity and preferential binding towards the detection of Ni2+ in water samples. Structural and morphological characterisation of the synthesised single layer graphene sheets was conducted by Raman spectrometry, HRTEM and HRSEM analysis. The instrumental parameters associated with the electrochemical response, including accumulation potential and accumulation time were investigated and optimised in addition to the influence of DMG and graphene concentrations. The NGr-DMG-GCE demonstrated well resolved, reproducible peaks, with RSD (%) below 5% and a detection limit of 1.5 µg L−1 for Ni2+ reduction at an accumulation time of 120 s. The prepared electrochemical sensor exhibited good detection and quantitation towards Ni2+ detection in tap water samples, well below 0.1 mg L−1 set by the WHO and EPA standards. This is comparable to the South African drinking water guidelines of 0.15 mg L−1.

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Simultaneous Determination of Nickel and Cobalt in Natural Water and Sediment Samples on an in-situ Plated Mercury Film Electrode by Adsorptive Cathodic Stripping Voltammetry

Cited by 20 publications

References 17 publications

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni²⁺ Ion Release from Corroding NiTi Shape Memory Alloys

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni²⁺ Ion Release from Corroding NiTi Shape Memory Alloys

Osteryoung square wave stripping voltammetry at mercury film electrode for monitoring ultra trace levels of Tarabine PFS and its interaction with ssDNA

Complexation-Based Detection of Nickel(II) at a Graphene-Chelate Probe in the Presence of Cobalt and Zinc by Adsorptive Stripping Voltammetry

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Simultaneous Determination of Nickel and Cobalt in Natural Water and Sediment Samples on an in-situ Plated Mercury Film Electrode by Adsorptive Cathodic Stripping Voltammetry

Cited by 20 publications

References 17 publications

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni2+ Ion Release from Corroding NiTi Shape Memory Alloys

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni2+ Ion Release from Corroding NiTi Shape Memory Alloys

Osteryoung square wave stripping voltammetry at mercury film electrode for monitoring ultra trace levels of Tarabine PFS and its interaction with ssDNA

Complexation-Based Detection of Nickel(II) at a Graphene-Chelate Probe in the Presence of Cobalt and Zinc by Adsorptive Stripping Voltammetry

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An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni²⁺ Ion Release from Corroding NiTi Shape Memory Alloys

An Electrochemical Robotic System for Routine Cathodic Adsorptive Stripping Analysis of Ni²⁺ Ion Release from Corroding NiTi Shape Memory Alloys