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. Author manuscript; available in PMC: 2009 Mar 14.
Published in final edited form as: J Chromatogr A. 2007 Jul 13;1184(1-2):281–295. doi: 10.1016/j.chroma.2007.07.014

Fig. 19.

Fig. 19

Separation of five light hydrocarbons using silica-based monolithic capillary columns and carbon dioxide and hydrogen as carrier gas.(Reprinted from ref. [77]. Copyright 2007 Springer). Column 58,5 cm × 200 μm I.D.; (a) carbon dioxide, pressure 4.33 MPa, mean flow velocity 42,5 mm/sec, (b) hydrogen, pressure 8.5 MPa, mean velocity 136,6 mm/sec; temperature 60 °C. Peaks: methane (1), ethane (2), propane (3), 2-methylpropane (4), butane (5).