Smartphone-Assisted Colorimetric Determination of Iron Ions in Water by Using Anthocyanin from "Ruellia Tuberosa" L. as a Green Indicator and Application for Hands-On Experiment Kit

Autor/inn/en	Meelapsom, Rattapol; Rattanakaroonjit, Waranphat; Prakobkij, Akarapong; Malahom, Nutthaporn; Supasorn, Saksri; Ruangchai, Sukhum; Jarujamrus, Purim
Titel	Smartphone-Assisted Colorimetric Determination of Iron Ions in Water by Using Anthocyanin from "Ruellia Tuberosa" L. as a Green Indicator and Application for Hands-On Experiment Kit
Quelle	In: Journal of Chemical Education, 99 (2022) 4, S.1660-1671 (12 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Prakobkij, Akarapong) ORCID (Jarujamrus, Purim)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/acs.jchemed.1c01120
Schlagwörter	Science Instruction; Chemistry; Hands on Science; Science Experiments; Grade 12; High School Students; Secondary School Science; Scientific Concepts; Concept Formation; Telecommunications; Handheld Devices; Technology Uses in Education + Suchen Sie Ihr Suchwort? Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Chemie; School year 12; 12. Schuljahr; Schuljahr 12; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin; Concept learning; Begriffsbildung; Telekommunikationstechnik; Technology enhanced learning; Technology aided learning; Technologieunterstütztes Lernen
Abstract	The present work describes a simple hands-on experiment kit for colorimetric quantification of ferric (III) ion (Fe[superscript 3+]) in an aqueous medium using anthocyanin extracted from "Ruellia tuberosa" L. as a green indicator. The extraction of a high amount of anthocyanin was easily accomplished by using only hot water instead of an organic solvent. The formation of the colored Fe[superscript 3+]-anthocyanin complex occurred on a homemade 24-well plate and the generated color was captured by a smartphone. The increase in color intensity was measured in the red, green, blue (RGB) system by the ImageJ software under the optimum conditions. The developed method enabled quantification of Fe[superscript 3+] at low concentrations with the detection limit of 0.03 mg L[superscript -1] and provided the linear range (0.05-2.0 mg L[superscript -1]) with good linearity (R[superscript 2] = 0.9985) with Fe[superscript 3+] concentration. The concentrations of Fe[superscript 3+] in water samples determined by the developed method were not significantly different from those measured with UV-visible spectrophotometry at a 95% confidence level. In addition, the extracted anthocyanin stored at 4 °C was stable for two months. This hands-on experiment was implemented as a 2 h activity for 30 grade-12 students in which they were asked to determine the concentration of Fe[superscript 3+] in a water sample using the smartphone-assisted colorimetric method. The students' understanding of the related concepts of oxidation-reduction and determination of iron was collected by a diagnostic conceptual test. Having participated in the experiment, the students were found to have significantly improved understanding of both concepts. (As Provided).
Anmerkungen	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: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01