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Comparison of Chromatographic Methods for the Determination of Bound Glycerol in Biodiesel

An important fuel criterion for biodiesel is bound glycerol, which is a function of the residual amount of triglycerides and partial glycerides in the biodiesel. Either high-temperature gas chromatography or high performance liquid chromatography can be used for determining these minor but important components in biodiesel. In this paper we have conducted a statistical study on the accuracy of the two methods for ascertaining the bound glycerol in biodiesel fuels obtained from different feedstocks. Analysis of variance showed that with one exception, namely diacylglycerols in some soy oil based biodiesel, there was no statistical difference in bound glycerol for the biodiesel samples analyzed or a difference between methods. Operationally, the high performance liquid chromatographic method is superior to the high temperature gas chromatographic method in that it requires no sample derivatization, has shorter analysis times, and is directly applicable to most biodiesel fuels.

  • Content Type Journal Article
  • Pages -
  • DOI 10.1365/s10337-003-0372-z
  • Authors
    • T. A. Foglia, U.S. Department of Agriculture Agricultural Research Service Eastern Regional Research Center, 600 East Mermaid Lane Wyndmoor PA 19038 USA
    • K. C. Jones, U.S. Department of Agriculture Agricultural Research Service Eastern Regional Research Center, 600 East Mermaid Lane Wyndmoor PA 19038 USA
    • A. Nuñez, U.S. Department of Agriculture Agricultural Research Service Eastern Regional Research Center, 600 East Mermaid Lane Wyndmoor PA 19038 USA
    • J. G. Phillips, U.S. Department of Agriculture Agricultural Research Service Eastern Regional Research Center, 600 East Mermaid Lane Wyndmoor PA 19038 USA
    • M. Mittelbach, Institute for Chemistry University of Graz Heinrichstrasse 28 8010 Graz Austria
    • Journal Chromatographia
    • Online ISSN 1612-1112
    • Print ISSN 0009-5893

Authors:   T. A. Foglia, K. C. Jones, A. Nuñez, J. G. Phillips, M. Mittelbach
Journal:   Chromatographia
Year:   2004
DOI:   10.1365/s10337-003-0372-z
Publication date:   02-Jul-2004
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