Literaturnachweis - Detailanzeige
| Autor/inn/en | Scanlon, Christopher; Gebeyehu, Zewdu; Griffin, Kameron; Dabke, Rajeev B. |
|---|---|
| Titel | Volumetric Titrations Using Electrolytically Generated Reagents for the Determination of Ascorbic Acid and Iron in Dietary Supplement Tablets: An Undergraduate Laboratory Experiment |
| Quelle | In: Journal of Chemical Education, 91 (2014) 6, S.898-901 (4 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0021-9584 |
| DOI | 10.1021/ed400630u |
| Schlagwörter | Leitfaden; Unterricht; Lehrer; College Science; Science Experiments; Science Laboratories; Undergraduate Students; Chemistry; Statistical Analysis; Science Instruction |
| Abstract | An undergraduate laboratory experiment for the volumetric quantitative analysis of ascorbic acid and iron in dietary supplement tablets is presented. Powdered samples of the dietary supplement tablets were volumetrically titrated against electrolytically generated reagents, and the mass of dietary reagent in the tablet was determined from the volume of potassium hydrogen phthalate solution used as a primary standard. Proposed electrolysis cell was directly powered by a 9 V battery eliminating the requirement of a coulometer. Students use this method to quantify the active ingredient in dietary supplement tablets: iron and ascorbic acid (vitamin C). The experiment is suitable for the undergraduate quantitative analysis laboratory. (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 | 2017/4/10 |
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