Electrochemical microcell based on silver solid amalgam electrode for voltammetric determination of pesticide difenzoquat
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10399163" target="_blank" >RIV/00216208:11310/19:10399163 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iTYmHpknMv" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=iTYmHpknMv</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.snb.2019.126931" target="_blank" >10.1016/j.snb.2019.126931</a>
Alternative languages
Result language
angličtina
Original language name
Electrochemical microcell based on silver solid amalgam electrode for voltammetric determination of pesticide difenzoquat
Original language description
This study presents an application of a non-toxic mercury meniscus modified silver solid amalgam electrode as a reliable, user-friendly and sensitive sensor for the determination of herbicide difenzoquat as a model pollutant in micro volumes of samples. Difenzoquat gave one cathodic peak at around -1.4 V (vs. Ag/AgCl/3 mol L-1 KCl reference electrode) independent on pH (in the range 8-12). Sharp maxima greatly influenced the peak of the analyte and they were eliminated by the addition of gelatine as a surface-active compound. The optimal supporting electrolyte was found to be Britton-Robinson (BR) buffer with pH 12. Determination of the analyte in the 10 mu L volume was carried out in a newly developed simple microcell with the amalgam working electrode. A procedure for fast and reliable removal of dissolved oxygen was used. Difenzoquat was therefore successfully determined by differential pulse voltammetry in BR buffer pH 12 and in model river water samples with addition of gelatine with limits of quantification 0.41 and 0.45 mu mol L-1, respectively. It was proved that this sensor can be directly used for monitoring of pollutants in volumes of tens of microliters of various samples with similar parameters as the determination in larger volumes.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10406 - Analytical chemistry
Result continuities
Project
<a href="/en/project/GA17-03868S" target="_blank" >GA17-03868S: New Methods of Electrochemical Monitoring of Biologically Active Organic Compounds in Environmental, Biological and Food Matrices</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Sensors and Actuators B: Chemical
ISSN
0925-4005
e-ISSN
—
Volume of the periodical
299
Issue of the periodical within the volume
November
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
6
Pages from-to
126931
UT code for WoS article
000486994500015
EID of the result in the Scopus database
2-s2.0-85070529261