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ERIC Number: EJ1088226
Record Type: Journal
Publication Date: 2016-Jan
Pages: 7
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Analysis of Whiskey by Dispersive Liquid-Liquid Microextraction Coupled with Gas Chromatography/Mass Spectrometry: An Upper Division Analytical Chemistry Experiment Guided by Green Chemistry
Owens, Janel E.; Zimmerman, Laura B.; Gardner, Michael A.; Lowe, Luis E.
Journal of Chemical Education, v93 n1 p186-192 Jan 2016
Analysis of whiskey samples prepared by a green microextraction technique, dispersive liquid-liquid microextraction (DLLME), before analysis by a qualitative gas chromatography-mass spectrometry (GC/MS) method, is described as a laboratory experiment for an upper division instrumental methods of analysis laboratory course. Here, aroma compounds in whiskey samples (n = 11) were extracted using ultrasound-assisted DLLME with chloroform (as extraction solvent). The chloroform extract was analyzed by GC/MS with data manipulation by AMDIS (automated mass spectral deconvolution and identification system) to allow for comparisons between whiskey samples. Aroma compounds commonly reported in the literature (furfural, isoamyl acetate, 5-methyl furfural, ethyl esters, phenylethyl alcohol, whiskeylactone, and vanillin) were tentatively identified based upon the match to the MS library. This unique laboratory allows students to engage in a real-world analysis of a high-value product and to explore the use of AMDIS to tentatively identify compounds and compare chromatographic profiles of various whiskey samples for identification of common and unique constituents. Students also use the literature to provide sensory information for these identified semivolatile compounds.
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
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Colorado
Grant or Contract Numbers: N/A