On-line monitoring of cobalt ion zinc plant electrolyte by differential pulse adsorptive stripping voltammetry

Mrzljak, Robert I.; Bond, Alan M.; Cardwell, Terence J.; Cattrall, Robert W.; Knight, Roger W.; Newman, O. M. G.; Champion, Bruce R.; Hey, John C.; Bobrowski, Andrzej

doi:10.1016/0003-2670(93)85183-k

Cited by 24 publications

(7 citation statements)

References 14 publications

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“…As shown in Figure 4 b, the interferences of these trace impurity ions on the detection of Co 2+ are negligible. The concentrations of interfering ions are selected based on the upper limit or slightly below the upper limit concentration of possible impurity ion in zinc electrolyte [ 21 , 22 , 34 ]. Therefore, the PVP-AgNPs can be used for the detection of Co 2+ in industrial zinc electrolyte, although this is faced with the challenges of both the fluctuation of Zn 2+ concentration and the co-existence of other metal impurity ions.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, facile and high-efficiency detection of Co 2+ in zinc electrolyte is explored by the polarography method, which uses a dropping mercury electrode to increase the sensitivity and selectivity of trace Co 2+ [ 16 , 21 , 22 , 23 ]. However, the following challenges restrict its widespread application: (1) the highly toxic property of mercury.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection

Xiao

Weng

Tang³

et al. 2023

Molecules

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The direct and rapid determination of trace cobalt ion (Co2+) in the electrolyte of zinc smelting plants is urgently needed but is impeded by the severe interference of extremely high-concentration zinc ions in the solution. Herein, colorimetric detection of Co2+ by the polyvinylpyrrolidone functionalized silver nanoparticles (PVP-AgNPs) is realized in solutions with the Zn/Co ratio being high, up to (0.8–5) × 104, which is located within the ratio range in industrial solution. The high concentration of Zn2+ induces a strong attenuation of Co2+-related signals in ultraviolet-visible (UV-vis) extinction spectra; nevertheless, a good linear range for detecting 1–6 mg/L Co2+ in 50 g/L Zn2+ solution is still acquired. The strong anti-interference toward other metal ions and the mechanism understanding for trace Co2+ detection in such a high-concentration Zn2+ solution are also revealed by systematic analysis techniques. The results extend the AgNPs as colorimetric sensors to industrial solutions, providing a new strategy for detecting trace-metal ions in industrial plants.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection

Xiao

Weng

Tang³

et al. 2023

Molecules

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“…These procedures can be used to perform simultaneous ASV quantification of cadmium, lead, antimony and copper. They can also be used for simultaneous detection of nickel and cobalt via AdSV with dimethyldioxime, or for extremely sensitive and selective AdSV determination of cobalt in the presence of α-benzildioxime as a ligand and nitrite as a catalytic agent 182,183 . The last of these procedures has an additional advantage, as it does not require the matrix exchange procedure.…”

Section: Trace Metals and Metalloidsmentioning

confidence: 99%

Electrochemical stripping analysis

Ariño

Banks

Bobrowski

et al. 2022

Nat Rev Methods Primers

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Electrochemical stripping analysis (ESA) is a trace electroanalytical technique for the determination of metal cations, inorganic ions, organic compounds and biomolecules. It is based on a pre-concentration step of the target analyte(s), or a compound of the target, on a suitable working electrode. This is followed by a stripping step of the accumulated analyte using an electroanalytical technique. Advantages of ESA include high sensitivity and low limits of detection, multi-analyte capability, low cost of instrumentation and consumables, low power requirements, potential for on-site analysis, speciation capability and scope for indirect biosensing. This Primer covers fundamental aspects of ESA and discusses methods of pre-concentration and stripping, instrumentation, types of working electrodes and sensors, guidelines for method optimization, typical applications, data interpretation and interferences, and method limitations and workarounds. Finally, the current trends and future prospects of ESA are highlighted.

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“…Some of the adaptors described in the literature are laboratory-built devices [9, 22, 26 ± 32], others are commercial devices from EG&G PAR (used, for example by Lloyd et al [33], Mrzlijak et al [34], Mahoney et al [35]), Metrohm (no longer available) or BAS (BioAnalytical Systems).…”

Section: Introductionmentioning

confidence: 99%

Critical Comparison of Four Simple Adaptors for Flow Amperometric and Stripping Voltammetry with Mercury Drop Electrodes in Batch Cells

et al. 2004

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Electrochemical batch cells with mercury drop electrodes, MDEs, are readily available from a number of producers and widely used in electroanalysis for polarography, voltammetry and stripping voltammetry. To increase sample throughput and reduce reagent and sample consumption, the tendency is to couple the MDE with flow analysis systems (e.g., FIA, SIA or BIA). Many special flow cells for MDEs are described in the literature, but it is easier to convert existing commercial batch cells to flow operation. To assess the performance of such flow adaptors, four models were chosen because they are directly fitted to the glass capillary of any MDE, light enough not to impair the mechanical drop knocker and can be effortlessly built in the laboratory. They were all found adequate for flow amperometry and stripping voltammetry, with differences in sensitivity, flow rate dependence, response time, drop stability, tolerance to bubbles, uncompensated resistance and recontamination of disposed analyte from the electrolytic bath. Two of them, a simple L-shaped PTFE tube and an upstream nozzle holder made from a disposable pipette tip, gather a larger set of desirable features.

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On-line monitoring of cobalt ion zinc plant electrolyte by differential pulse adsorptive stripping voltammetry

Cited by 24 publications

References 14 publications

Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection

Extending Ag Nanoparticles as Colorimetric Sensor to Industrial Zinc Electrolyte for Cobalt Ion Detection

Electrochemical stripping analysis

Critical Comparison of Four Simple Adaptors for Flow Amperometric and Stripping Voltammetry with Mercury Drop Electrodes in Batch Cells

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