CONDUCTOMETRY ANALYSIS - BENEFICIAL METHOD FOR DETERMINING THE CHEMICAL COMPOSITION OF ALKALINE SILICATE SOLUTIONS
Loading...
Date
2024-04-12
Authors
Kalina, Lukáš
Bílek, Vlastimil
Flídrová, Michaela
Markusík, David
Topolář, Libor
Fládr, Josef
0000-0001-8127-8175Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Metals and Technology
Altmetrics
Abstract
The study deals with the methodology for determining the chemical composition of alkaline silicate solutions. Nowadays, the most widely used method in industry is titration, using the color change of an acid -base indicator. This technique is very accurate for the determination of the total alkalinity (i.e., Na2O, K2O, or Li2O). However, a problem arises in the determination of the SiO2 content, since the color change of the methyl red indicator is very slow and therefore the equivalence point is unclear. The main aim of this work is to present the benefits of conductometric titration, where the equivalence point is indicated by a sudden change in the conductivity. The applicability of the method was verified with other analytical techniques, such as ICP-OES and gravimetric analyses. Their results confirmed the values of the obtained silicate module (the molar ratio of SiO2 and alkaline oxide) in the cases of sodium, potassium and lithium water glasses. Based on the obtained results, one can say that conductometry is a very promising method providing an accurate, fast and instrumentally undemanding chemical characterization of alkaline silicate solutions, usable even in a manufacturing process.
Description
Citation
Materiali in tehnologije. 2024, vol. 58, issue 3, p. 357-361.
https://mater-tehnol.si/index.php/MatTech/article/view/1005/336
https://mater-tehnol.si/index.php/MatTech/article/view/1005/336
Document type
Peer-reviewed
Document version
Published version
Date of access to the full text
Language of document
en