Retractable-pen-based renewable silver amalgam film electrode for microliter sample analysis of electrochemically reducible environmental pollutants

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10424423" target="_blank" >RIV/00216208:11310/21:10424423 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=H6kiV.un-z" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=H6kiV.un-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2020.129057" target="_blank" >10.1016/j.snb.2020.129057</a>

Result language

angličtina

Original language name

Retractable-pen-based renewable silver amalgam film electrode for microliter sample analysis of electrochemically reducible environmental pollutants

Original language description

A novel, inexpensive, and simple construction of a retractable-pen-based renewable silver amalgam film electrode (RAE) was introduced in this study for electrochemical sensing of electrochemically reducible compounds in small sample volumes. This electrode is based on a mechanical renewal of the amalgam film achieved by using mechanisms found in a common retractable ballpoint pen. Cadmium(II) and two model environmental pollutants (4-nitrophenol (NP) and 3-nitrobiphenyl (NB)) were used to evaluate the performance of the novel RAE and its utilization in the electrochemical microcell. In order to decrease the high variability of observed reduction potentials of NP and NB on RAE, the influence of the content of silver in the amalgam used for the renewal of the film was investigated. It was found that 4 % of Ag in the amalgam improved the repeatability of peak potentials. Obtained limit of quantification (LOQ) for Cd(II) was 54 nmol L-1 (6.1 ppb) in acetate buffer (pH 4.8); LOQ for NP was 1.2 mu mol L-1 in Briton-Robinson (BR) buffer (pH 4.0). LOQ for NB was 2.5 mu mol L-1 in BR buffer (pH 6.0) - methanol (8:2, v/v) medium. The possibility of further decrease of LOQ of NB to a nanomolar range with the help of the microcell was demonstrated by the liquid-liquid extraction (LLE) to hexane with the preconcentration factor of 1000. Moreover, RAE offers portability, long-term stability, simple renewal of the surface, a wide cathodic potential window, and it can be considered as an inexpensive, robust, and safe alternative to other mercury-based electrochemical sensors.

Czech name

—

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

—

OECD FORD branch

10406 - Analytical chemistry

Project

<a href="/en/project/GC20-01417J" target="_blank" >GC20-01417J: New approaches preventing passivation in monitoring of environmental organic pollutants</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

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

Name of the periodical

Sensors and Actuators B: Chemical

ISSN

0925-4005

e-ISSN

—

Volume of the periodical

329

Issue of the periodical within the volume

February

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

129057

UT code for WoS article

000612060700006

EID of the result in the Scopus database

2-s2.0-85096897558