Work

Indirect Determination of the Hydrogen Index of Small Volume Solutions by Digital Colorimetry

Year: 2024

Type: article

Abstract: A technique for indirect determination of the hydrogen index of aqueous solutions of small volume (from units to hundreds of µl) by digital colorimetry with the use of consumer optical raster imaging devices is proposed. To find pH, no fixed color scales or information on the concentration of acid-base indicator in the solution is needed. A prototype of a hand-held analyzer based on a smartphone was developed for out-of-laboratory applications. The accuracy of pH determination results was confirmed by ionometry and spectrophotometry techniques.

Source: Lomonosov chemistry journal

DOI: 10.55959/msu0579-9384-2-2024-65-5-378-387

Authors: Kirill V. Oskolok, Oksana V. Monogarova, Andrei V. Garmay, Mariia М. Ivanova

Institution: Lomonosov Moscow State University

Language: English

Topic: Analytical Chemistry and Sensors

Subfield: Bioengineering

Field: Chemical Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: Lomonosov Moscow State University

Award: G1245661748