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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/GC20-01417J" target="_blank" >GC20-01417J: Nové přístupy zabraňující pasivaci elektrod při monitorování environmentálních organických polutantů</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Sensors and Actuators B: Chemical

ISSN

0925-4005

e-ISSN

—

Svazek periodika

329

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

129057

Kód UT WoS článku

000612060700006

EID výsledku v databázi Scopus

2-s2.0-85096897558