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Polybutadiene-coated zirconia packing materials in solvating gas chromatography using carbon dioxide as mobile phase

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Summary

In this paper, practical considerations of column efficiency, separation speed, thermal stability, and column polarity of capillary columns packed with polybutadiene-coated zirconia were investigated under solvating gas chromatography (SGC) conditions using carbon dioxide as mobile phase. When compared with results obtained from conventional porous octadecyl obtained from conventional porous octadecyl bonded silica (ODS) particles, PBD-zirconia particles produced greater change in mobile phase linear velocity with pressure than conventional ODS particles under the same conditions. The maximum plate number per second (Nt) obtained with a 30 cm PBD-zirconia column was approximately 1.5 times higher than that obtained with an ODS column at 100 °C. Therefore, the PBD-zirconia phase is more suitable for fast separations than conventional ODS particles in SGC. Maximum plate numbers per meter of 76,900 and 63,300 were obtained using a 57 cm×250 μm i.d. fused silica capillary column packed with 3 μm PBD-zirconia at 50 °C and 100 °C, respectively. The PBD-zirconia phase was stable at temperatures up to 320 °C under SGC conditions using carbon dioxide as mobile phase. Polarizable aromatic compounds and low molecular weight ketones and aldehydes were eluted with symmetrical peaks from a 10 cm column packed with 3 μm PBD-zirconia. Zirconia phases with greater inertness are required for the analysis of more polar compounds by SGC.

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Authors and Affiliations

  1. Department of Chemistry and Biochemistry, Brigham Young University, 84602-5700, Provo, UT, USA

    N. Wu, Q. Tang, Y. Shen & M. L. Lee

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  1. N. Wu
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  2. Q. Tang
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  3. Y. Shen
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  4. M. L. Lee
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Wu, N., Tang, Q., Shen, Y. et al. Polybutadiene-coated zirconia packing materials in solvating gas chromatography using carbon dioxide as mobile phase. Chromatographia 49, 431–435 (1999). https://doi.org/10.1007/BF02467619

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  • DOI: https://doi.org/10.1007/BF02467619

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