Trace level voltammetric determination of Zn(II) in selected nutrition related samples by bismuth-oxychloride-multiwalled carbon nanotube composite based electrode

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F19%3A43915098" target="_blank" >RIV/62156489:43210/19:43915098 - isvavai.cz</a>

Alternative codes found

RIV/00216275:25310/19:39914669

Result on the web

<a href="https://doi.org/10.1016/j.microc.2018.12.053" target="_blank" >https://doi.org/10.1016/j.microc.2018.12.053</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.microc.2018.12.053" target="_blank" >10.1016/j.microc.2018.12.053</a>

Result language

angličtina

Original language name

Trace level voltammetric determination of Zn(II) in selected nutrition related samples by bismuth-oxychloride-multiwalled carbon nanotube composite based electrode

Original language description

Bismuth-oxychloride-multiwalled carbon nanotube composite material was applied as surface modifier of glassy carbon electrode (BiOCl-MWCNT/GCE) for rapid and reliable trace level determination of Zn(II) in selected foodstuffs. The method development encompasses the optimization of electrode preparation including the transmission electron microscopic study of the modifier suspension, selection of the supporting electrolyte pH, the adjustment of the operation parameters of the SW-ASV measurements and the investigation of matrix effects. By the BiOCl-MWCNT/GCE recorded calibration curve showed an excellent linearity towards Zn reoxidation peak intensity in the concentration range from 2.50 to 80.0 μg LMINUS SIGN 1 with the calculated LOD of 0.75 μg LMINUS SIGN 1 which was associated with 120 s accumulation time and accumulation potential MINUS SIGN 1.40 V vs SCE in acetate buffer pH 4.5. A satisfactory repeatability expressed as relative standard deviation of 4.8% was obtained in the case of 10.0 μg LMINUS SIGN 1 Zn(II) in model solution. The Zn(II) reoxidation signal from BiOCl-MWCNT/GCE received by the optimized SW-ASV method was compared with those recorded with bare, classical bismuth-film, multiwalled carbon nanotubes and by in situ made advanced bismuth-film-MWCNTs working electrodes. The applicability of the proposed BiOCl-MWCNT/GCE based method was corroborated via measuring the target analyte in two nutrition related real samples: in a dietary supplement and in a brewer&apos;s yeast sample. Comparative flame atomic absorption spectrometric measurements verified the obtained results in the case of yeast sample.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Microchemical Journal

ISSN

0026-265X

e-ISSN

—

Volume of the periodical

146

Issue of the periodical within the volume

May

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

178-186

UT code for WoS article

000463132100023

EID of the result in the Scopus database

2-s2.0-85059519711