Summary
The separation of triglycerides (TGs) was studied by subcritical fluid chromatography (SubFC) with octadecyl packed columns and C02/modifier mobile phases. Two detection systems (UV and ELSD) were used.
In the first part systematic experiments were carried out for studying the retention behavior of characteristic triglycerides. This was done by analysing a simple vegetable oil (argan), which contains triglycerides differing by the methylene group number (between P and S) or by the unsaturation number (between O, L, and Ln). The selectivity calculations from these selected triglycerides have enabled better modeling of the effect of chromatographic parameters on separation (modifier nature and percentage, temperature, and oulet pressure). Following eluotropic strength or specific interaction modifications, polar modifiers (methanol and acetonitrile) improve the selectivity between the selected pairs of triglycerides. An increase in these selectivities also occurs when the temperature decreases, but the effect of pressure on the separation is almost negligible.
In a second part, the final optimization was studied. Since polyfunctional octadecyl bonded silica fails to separate one of these pairs, a monofunctional one was chosen. An improved isocratic separation was achieved with seven coupled columns (Hypersil ODS) and with a modifier mixture (ACN/MeOH/CO2). The analysis time was 65 minutes. Applied to complex samples, rapeseed, these conditions enabled separation of numerous compounds in comparison to RPLC.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
F. X. Mordret, J. L. Croustille, New Trends in Lipid and Lipoprotein Analyses, Chapter 12, J. L. Sebedio and E. G. Perkins Eds, AOCS Press Publ., Champaign, USA, 1995.
S. Héron, J. Bleton, A. Tchapla, New trends in lipid and lipoprotein analyses, Chapter, 16, J. L. Sebedio and E. G. Perkins, Eds., AOCS Press Publ., Champain, USA, 1995.
E. Geeraert, Chromatography of Lipids in Biomedical Research and Chemical Diagnosis, Chapter 2, A. Kuksis, Ed., J. Chromatogr. Library, Elsevier, Amsterdam, 1987.
W. W. Christie, New trends in lipid and lipoprotein analyses, Chapter 7, J. L. Sebedio and E. G. Perkins Eds., AOLS Press Publ., Champain, USA (1995).
E. C. Smith, A. D. Jones, E. W. Hammond, J. Chromatogr.188, 205 (1980).
S. Héron, A. Tchapla, Analusis21, 269 (1993).
A. Tchapla, S. Héron, E. Lesellier, Spectra 2000,158, 42 (1991).
M. C. Aubert, C. R. Lee, A. M. Krstulovic, E. Lesellier, A. Tchapla, J. Chromatogr.557 (1991) 47.
E. Lesellier, A. M. Krstulovic, A. Tchapla, Chromatographia36, 275 (1993).
E. Lesellier, A. M. Krstulovic, A. Tchapla, J. Chromatogr.649, 137 (1993).
E. Lesellier, A. Tchapla, A. M. Krstulovic, J. Chromatogr.645, 29 (1993).
S. Brossard, M. Lafosse, M. Dreux, J. Becard, Chromatographia36, 268 (1993).
D. Uppmoor, G. Brunner, Chromatographia33, 255 (1992).
P. Mourier, M. Caude, R. Rosset, Analusis13, 299 (1985).
T. A. Berger, W. H. Wilson, Anal. Chem.65, 1451 (1993).
E. Lesellier, A. Tchapla, Supercritical Fluid Chromatography with Packed Columns, Chapter 7, C. Berger and K. Anton, Eds, J. Stubenrauch Publ., Marcel Dekker, Inc., New York, 1998.
Y. Funata, Y. Hirata, J. Chromatogr.764, 301 (1997).
Y. Funata, d. Y. Hirata, J. Chromatogr.800, 317 (1999).
E. Lesellier, M. C. Pechard, A. Tchapla, C. R. Lee, A. M. Krstulovic, J. Chromatogr.557, 59 (1991).
T. A. Berger, J. High Resol. Chromatogr.14, 312 (1991).
T. A. Berger, J. F. Deye, Chromatographia31, 529 (1991).
K. Gurdale, E. Lesellier, A. Tchapla, Anal. Chem.71, (1999)
A. Tchapla, S. Heron, E. Lesellier, H. Colin, J. Chromatogr.656, 81 (1993).
E. Lesellier, A. Tchapla, P. Subra, R. Tufeu, Mesure de la Masse Volumique des Mélanges Dioxyde de Carbone/Modificateurs Organiques et Relation avec la Rétention de Molécules Biologiques en Chromatographie Subcritique, Proceedings of the 3eme Colloque sur les Fluides Supercritiques Grasse, France, 1996, p 257.
S. Héron, A. Tchapla, Analusis22, 114 (1994).
S. Héron, E. Lesellier, A. Tchapla, J. Liquid Chromatogr.8, 386 (1995).
L. G. Blomberg, M. Demirbuker, P. E. Andersson, JAOCS70, 939 (1993).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lesellier, E., Tchapla, A. Separation of vegetable oil triglycerides by subcritical fluid chromatography with octadecyl packed columns and CO2/modifier mobile phases. Chromatographia 51, 688–694 (2000). https://doi.org/10.1007/BF02505406
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02505406