Literaturnachweis - Detailanzeige
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 |
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 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 |