Ultrasensitive determination of tungsten(VI) on pikomolar level in voltammetric catalytic adsorptive catechol-chlorate(V) system

Piech, Robert; Bugajna, Anna; Baś, Sebastian; Kubiak, Władysław W.

doi:10.1016/j.jelechem.2010.04.003

Cited by 15 publications

(10 citation statements)

References 35 publications

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“…Tungsten is a metal which occurs naturally in soils and sediments, usually in small concentrations ranging between 0.2 and 2.4 mg·kg −1 in the lithosphere [ 1 – 3 ]. This metal is also present in oceanic waters in trace amounts, for instance its contents for the Northern Atlantic and Pacific Oceans reported in the literature are 100 ng·L −1 and 8 ng·L −1 respectively [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…There are many techniques to analyse tungsten in environmental samples; mostly spectrophotometric methods such as Atomic Absorption and ICP-OES, as well as voltammetric and polarographic methods have been used [ 2 , 3 , 9 – 11 ]. The application of enzyme biosensors for determining toxic compounds is a dynamic promising research trend, because the associated analytical systems are simple, rapid and selective for amperometric, potentiometric or conductimetric techniques.…”

Section: Introductionmentioning

confidence: 99%

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A Chronoamperometric Screen Printed Carbon Biosensor Based on Alkaline Phosphatase Inhibition for W(VI) Determination in Water, Using 2-Phospho-l-Ascorbic Acid Trisodium Salt as a Substrate

Alvarado-Gámez

Alonso‐Lomillo

Domínguez‐Renedo

et al. 2015

Sensors

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This paper presents a chronoamperometric method to determine tungsten in water using screen-printed carbon electrodes modified with gold nanoparticles and cross linked alkaline phosphatase immobilized in the working electrode. Enzymatic activity over 2-phospho-l-ascorbic acid trisodium salt, used as substrate, was affected by tungsten ions, which resulted in a decrease of chronoamperometric current, when a potential of 200 mV was applied on 10 mM of substrate in a Tris HCl buffer pH 8.00 and 0.36 M of KCl. Calibration curves for the electrochemical method validation, give a reproducibility of 5.2% (n = 3), a repeatability of 9.4% (n = 3) and a detection limit of 0.29 ± 0.01 μM. Enriched tap water, purified laboratory water and bottled drinking water, with a certified tungsten reference solution traceable to NIST, gave a recovery of 97.1%, 99.1% and 99.1% respectively (n = 4 in each case) and a dynamic range from 0.6 to 30 μM. This study was performed by means of a Lineweaver–Burk plot, showing a mixed kinetic inhibition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Chronoamperometric Screen Printed Carbon Biosensor Based on Alkaline Phosphatase Inhibition for W(VI) Determination in Water, Using 2-Phospho-l-Ascorbic Acid Trisodium Salt as a Substrate

Alvarado-Gámez

Alonso‐Lomillo

Domínguez‐Renedo

et al. 2015

Sensors

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“…The Hg(Ag)FE has also been utilized for the CAdSV quantification of W(VI) in the form of a complex with catechol in the presence of a chlorate oxidizing agent [67] and of Ti(IV) with mandelic acid as a ligand and chlorate as an oxidant [68]. The methodology used to detect these two ions was adapted from similar procedures involving the HMDE.…”

Section: Catalytic Adsorptive Stripping Voltammetrymentioning

confidence: 99%

Renewable silver amalgam film electrodes in electrochemical stripping analysis—a review

Bobrowski

Królicka

Bobrowski³

2016

J Solid State Electrochem

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The success of a voltammetric sensing procedure depends mainly on the proper choice of the working electrode. This is because its ability to accumulate the analyte determines the sensitivity of the method. The main criterion of the selection of the proper working electrode is the available potential window. A variety of conductive materials have been used for the preparation of working electrodes. Of these, two kinds of mercury electrodes-hanging mercury drop and film-were used because of their excellent voltammetric performance and, in particular, their high overpotential of hydrogen reduction. The significant drawbacks of mercury electrodes, however, are the toxicity of the material and the instability of liquid mercury films. To overcome these disadvantages, less toxic mercury-containing materials have been used, such as amalgams and amalgam film electrodes. This group includes renewable silver amalgam film electrodes used for electrochemical stripping sensing purposes. These electrodes have successfully been applied for anodic, adsorptive, cathodic, catalytic voltammetric, and potentiometric stripping determination of trace amounts of inorganic cations and organic compounds in various natural matrices. In this review, the electrode design, characteristics, and application of two kinds of renewable silver amalgam film electrodes are discussed in detail.

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“…For the determination of tungsten, mostly spectrophotometric [5][6][7][8], voltammetric [9][10][11] and polarographic [12] methods were used.…”

Section: Introductionmentioning

confidence: 99%

“…A catalytic method was used for the determination of traces of tungsten by linear scan voltammetry using methyl red [10]. A renewable mercury film silver based electrode was used for the determination of ultra traces of tungsten(VI) using differential pulse catalytic adsorptive cathodic stripping voltammetry with presence of catechol as a ligand and chlorate(V) and a preconcentration of 60 s [11]. Molybdenum and tungsten salicoylhydroxamates have been extracted into methyl isobutyl ketone and then determined using differential pulse polarography [12].…”

Section: Introductionmentioning

confidence: 99%

A new and very simple procedure for the differential pulse polarographic determination of ultra trace quantities of tungsten using catalytic hydrogen wave and application to tobacco sample

Ünal

Somer

2012

Journal of Electroanalytical Chemistry

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Ultrasensitive determination of tungsten(VI) on pikomolar level in voltammetric catalytic adsorptive catechol-chlorate(V) system

Cited by 15 publications

References 35 publications

A Chronoamperometric Screen Printed Carbon Biosensor Based on Alkaline Phosphatase Inhibition for W(VI) Determination in Water, Using 2-Phospho-l-Ascorbic Acid Trisodium Salt as a Substrate

A Chronoamperometric Screen Printed Carbon Biosensor Based on Alkaline Phosphatase Inhibition for W(VI) Determination in Water, Using 2-Phospho-l-Ascorbic Acid Trisodium Salt as a Substrate

Renewable silver amalgam film electrodes in electrochemical stripping analysis—a review

A new and very simple procedure for the differential pulse polarographic determination of ultra trace quantities of tungsten using catalytic hydrogen wave and application to tobacco sample

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