Detailed Information on Publication Record
2021
Colorimetric Chemosensor Array for Determination of Halides
ŠÍDLO, Michal, Přemysl LUBAL and Pavel, Jr. ANZENBACHERBasic information
Original name
Colorimetric Chemosensor Array for Determination of Halides
Authors
ŠÍDLO, Michal (203 Czech Republic, belonging to the institution), Přemysl LUBAL (203 Czech Republic, guarantor, belonging to the institution) and Pavel, Jr. ANZENBACHER (203 Czech Republic)
Edition
Chemosensors, MDPI, 2021, 2227-9040
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10406 Analytical chemistry
Country of publisher
Switzerland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 4.229
RIV identification code
RIV/00216224:14310/21:00121233
Organization unit
Faculty of Science
UT WoS
000622370000001
Keywords in English
metal complex; halide analysis; anion chemosensor; artificial neural network (ANN); multicomponent analysis; microplate reader/digital scanner; test strip paper(s)
Tags
Tags
International impact, Reviewed
Změněno: 3/5/2021 15:54, Mgr. Marie Šípková, DiS.
Abstract
V originále
The halide anions are essential for supporting life. Therefore, halide anion analyses are of paramount importance. For this reason, we have performed both qualitative and quantitative ana- lyses of halides (chloride, bromide, iodide) using the Tl(III) complex of azodye, 4-(2-pyridylazo)re- sorcinol (PAR), a potential new chemical reagent/sensor that utilizes the substitution reaction whereas the Tl(III)PAR complex reacts with a halide to yield a more stable thallium(III)-halide while releasing the PAR ligand in a process accompanied by color change of the solution. The experimental conditions (e.g., pH, ratio metal ion-to-ligand ratio, etc.) for the substitution reaction between the metal complex and a halide were optimized to achieve increased sensitivity and a lower limit of detection (chloride 7 mM, bromide 0.15 mM, iodide 0.05 mM). It is demonstrated that this single chemosensor can, due to release of colored PAR ligand and the associated analyte-specific changes in the UV/VIS spectra, be employed for a multicomponent analysis of mixtures of anions (chloride + bromide, chloride + iodide, bromide + iodide). The spectrophotometric data evaluated by artificial neural networks (ANNs) enable distinguishing among the halides and to determine halide species concentrations in a mixture. The Tl(III)-PAR complex was also used to construct sensor arrays utilizing a standard 96-well plate format where the output was recorded at several wavelengths (up to 7) using a conventional plate reader. It is shown that the data obtained using a digital scanner employing only three different input channels may also be successfully used for a subsequent ANN analysis. The results of all approaches utilized for data evaluation were similar. To increase the practical utility of the chemosensor, we have developed a test paper strip indicator useful for routine naked-eye visual determination of halides. This test can also be used for halide anion determination in solutions using densitometer. The methodology described in this paper can be used for a simple, inexpensive, and fast routine analysis both in a laboratory as well as in a field setting.
Links
| LQ1601, research and development project |
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| LTC20044, research and development project |
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| ME09065, research and development project |
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| MUNI/A/1424/2019, interní kód MU |
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