ERIC Number: EJ940775
Record Type: Journal
Publication Date: 2011-Jun
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
An Advanced Analytical Chemistry Experiment Using Gas Chromatography-Mass Spectrometry, MATLAB, and Chemometrics to Predict Biodiesel Blend Percent Composition
Pierce, Karisa M.; Schale, Stephen P.; Le, Trang M.; Larson, Joel C.
Journal of Chemical Education, v88 n6 p806-810 Jun 2011
We present a laboratory experiment for an advanced analytical chemistry course where we first focus on the chemometric technique partial least-squares (PLS) analysis applied to one-dimensional (1D) total-ion-current gas chromatography-mass spectrometry (GC-TIC) separations of biodiesel blends. Then, we focus on n-way PLS (n-PLS) applied to two-dimensional (2D) gas chromatography-mass spectrometry (GC-MS) separations of biodiesel blends. The purpose of the experiment is to determine the percent composition, by volume, of biodiesel in an unknown blend of biodiesel and conventional diesel. A secondary goal is to compare the prediction results of the PLS model to the n-PLS model to see if there is an advantage to analyzing multiple dimensions. The instructor initially creates a PLS model and an n-PLS model using separations of standard biodiesel blends where the percent compositions are known and vary from 0% to 20%. Then, the student collects the GC-TIC and GC-MS chromatograms of an unknown biodiesel blend to regress onto PLS and n-PLS models and discover the percent composition of the unknown sample. (Contains 4 figures.)
Descriptors: Chemistry, Laboratory Experiments, Spectroscopy, Science Instruction, Scientific Concepts, College Science, Scientific Principles, Biochemistry, Undergraduate Study
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
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A