Potentiometric sensor for chromium (VI) determination

The development of rapid, miniature and high-sensitivity sensors to control the environment is a topical problem of analytical chemistry is a topical issue of analytical chemistry. The purpose of this paper is to create an ion-selective electrode for determining the chromium (VI). The electrode was...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1611; no. 1; pp. 12031 - 12036
Main Authors Shibaev, A Yu, Shelkovnikov, V V, Novolokov, K Yu, Anishchenko, M V
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.08.2020
Subjects
Analytical chemistry
Chromates
Chromium
Electrodes
Mathematical analysis
Physics
Polyanilines
Spectrophotometry
Tetraethyl orthosilicate
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Summary:The development of rapid, miniature and high-sensitivity sensors to control the environment is a topical problem of analytical chemistry is a topical issue of analytical chemistry. The purpose of this paper is to create an ion-selective electrode for determining the chromium (VI). The electrode was formed by sequential electrochemical assembly. Chromotropic acid was used to form a stable compound with chromate ions. In order to create a highly developed electroactive surface, a polyaniline film was previously formed on the electrode. The tetraethoxysilane film was used as a semi-permeable membrane to prevent the washing out of modifier. This work studied the mechanism of analytic signal formation and proposed a possible structure of the final complex. The electrode allows determining the chromium concentration in the range of 10-6 ÷10-1 M. The method "introduced-found" and measurement data obtained by the method of spectrophotometry validate the results.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1611/1/012031