NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1228190
Record Type: Journal
Publication Date: 2019-Sep
Pages: 9
Abstractor: As Provided
ISSN: ISSN-0021-9584
Designing ColorX, Image Processing Software for Colorimetric Determination of Concentration, to Facilitate Students' Investigation of Analytical Chemistry Concepts Using Digital Imaging Technology
Šafranko, Silvija; Živkovic, Pavo; Stankovic, Anamarija; Medvidovic-Kosanovic, Martina; Széchenyi, Aleksandar; Jokic, Stela
Journal of Chemical Education, v96 n9 p1928-1937 Sep 2019
This work combines laboratory quantitative analysis of colored solutions and common devices for digital imaging (digital or web cameras or mobile phones, i.e., smartphones). ColorX software, specially designed for this study, was used for data collection and analysis in order to calculate concentrations of colored solutions from measured RGB values. Three different custom methods for determination of concentration have been developed: (i) RGB value measurement by pixel, (ii) RGB value measurement by pixel and Gaussian blur, and (iii) calculation of average RGB value of the selected image area. The performance of the developed software, ColorX, is demonstrated using different colored solutions, KMnO[subscript 4] (purple), CoSO[subscript 4] (red), NiSO[subscript 4] (green), and CuSO[subscript 4] (blue) solutions, as well as the Lowry protein assay (blue) in terms of its determination of the concentrations of unknown samples. The most suitable and effective method for studying the mentioned solutions was the calculation of an average RGB value for a selected image area. ColorX software is primarily designed for accessibility and simplicity, with the aim of promoting and encouraging students to explore and discover potential applications for digital imaging technology in basic analytical chemistry concepts.
Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: High Schools; Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A