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ERIC Number: EJ943650
Record Type: Journal
Publication Date: 2011-Sep
Pages: 5
Abstractor: As Provided
Reference Count: 24
ISSN: ISSN-0021-9584
Have Biofuel, Will Travel: A Colorful Experiment and a Different Approach to Teach the Undergraduate Laboratory
El Seoud, Omar A.; Loffredo, Carina; Galgano, Paula D.; Sato, Bruno M.; Reichardt, Christian
Journal of Chemical Education, v88 n9 p1293-1297 Sep 2011
The substitution of petroleum-based fuels with those from renewable sources has gained momentum worldwide. A UV-vis experiment for the quantitative analysis of biofuels (bioethanol or biodiesel) in (petroleum-based) diesel oil has been developed. Before the experiment, students were given a quiz on biofuels, and then they were asked to suggest a suitable UV-vis experiment for the quantification of biofuels in diesel oil. After discussing the results of the quiz, the experiment was conducted. This included the determination of [lambda][subscript max] of the medium-dependent, that is, solvatochromic, visible absorption band of the probe 2,6-bis[4-("tert"-butyl)phenyl]-4-{2,4,6-tris[4-("tert"-butyl)phenyl]pyridinium-1-yl}phenolate as a function of fuel composition. The students appreciated that the subject was linked to a daily situation and that they were asked to suggest the experiment. This experiment served to introduce the phenomena of solvation and solvatochromism. (Contains 6 figures.)
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 - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Brazil