Gravimetric titrations in a modern analytical laboratory: evaluation of performance and practicality in everyday use

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F22%3A43924742" target="_blank" >RIV/60461373:22320/22:43924742 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s11696-021-02004-z" target="_blank" >https://link.springer.com/article/10.1007/s11696-021-02004-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11696-021-02004-z" target="_blank" >10.1007/s11696-021-02004-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gravimetric titrations in a modern analytical laboratory: evaluation of performance and practicality in everyday use

Popis výsledku v původním jazyce

Titrations play a crucial role in quality assessment of inorganic chemicals and are still routinely done volumetrically with visual endpoint detection. These procedures require a significant amount of glassware, e.g., burettes designated for specific volumetric solutions, pipettes, volumetric flasks, the use of which presents many drawbacks such as liquid thermal expansion, liquid retention on the glass walls as well as poor readability. In recent years, the idea of gravimetric titrations, an old technique, where mass of the titrant is measured instead of the volume, has gained some traction among analytical chemists, as most disadvantages associated with volumetric titration can be solved by a switch to the gravimetric kind. In this study, six standardizations and six assays were carried out by gravimetric and volumetric titrations and the procedures were compared based on the combined standard uncertainty, repeatability, practical considerations and associated challenges. It was found that despite the low density and the large volume, there is no need to apply air buoyancy corrections to the titrants used for gravimetric titrations. These corrections, however, cannot be neglected for the mass of the standard and the sample when extremely accurate results are needed or if the densities of the two are vastly different. Gravimetric titrations outperformed the volumetric kind in both practicality and performance as was evident from the associated combined standard uncertainties. Also, there were no statistically significant differences between the mean assay results. For these reasons we recommend the use of gravimetric titrations for routine assays of inorganic chemicals.[GRAPHICS].

Název v anglickém jazyce

Gravimetric titrations in a modern analytical laboratory: evaluation of performance and practicality in everyday use

Popis výsledku anglicky

Titrations play a crucial role in quality assessment of inorganic chemicals and are still routinely done volumetrically with visual endpoint detection. These procedures require a significant amount of glassware, e.g., burettes designated for specific volumetric solutions, pipettes, volumetric flasks, the use of which presents many drawbacks such as liquid thermal expansion, liquid retention on the glass walls as well as poor readability. In recent years, the idea of gravimetric titrations, an old technique, where mass of the titrant is measured instead of the volume, has gained some traction among analytical chemists, as most disadvantages associated with volumetric titration can be solved by a switch to the gravimetric kind. In this study, six standardizations and six assays were carried out by gravimetric and volumetric titrations and the procedures were compared based on the combined standard uncertainty, repeatability, practical considerations and associated challenges. It was found that despite the low density and the large volume, there is no need to apply air buoyancy corrections to the titrants used for gravimetric titrations. These corrections, however, cannot be neglected for the mass of the standard and the sample when extremely accurate results are needed or if the densities of the two are vastly different. Gravimetric titrations outperformed the volumetric kind in both practicality and performance as was evident from the associated combined standard uncertainties. Also, there were no statistically significant differences between the mean assay results. For these reasons we recommend the use of gravimetric titrations for routine assays of inorganic chemicals.[GRAPHICS].

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Chemical Papers

ISSN

0366-6352

e-ISSN

2585-7290

Svazek periodika

76

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

8

Strana od-do

2051-2058

Kód UT WoS článku

000754648100010

EID výsledku v databázi Scopus

2-s2.0-85123938563