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fully automated interfaces; a simple RP-LC/GC interface; increased use of capillary LC columns; gradient elution LC/GC; the development of RP-LC/ SFC; emphasis on FT-IR and MS detectors; replacement of LC/GC with SFC/GC (or SFC/SFC) wherever possible; and the analysis of compounds adsorbed onto solid matrices by SFE/ GC(orSFE/SFC). LC/GC, SFC/GC, and SFE/GC have great potential for the chromatographic analysis of samples that are too complex to be resolved by a single separation method. The option of using SFs gives added scope to LC/GC, and many of the lessons learned from LC/GC interfacing can be applied to SFC/GC and SFE/GC. Ilona Davies is grateful to the Science and Engineering Research Council (U.K.) for grants GR/C/ 59208, GR/C/59144, and GR/D/67415, which supported her Ph.D. research for two years. Mark Raynor was supported by the Science and Engineering Research Council (U.K.), grant GR/E/ 00556. Jacob Kithinji was supported by grants from The Royal Society of Chemistry and The British Council. The sample of shale oil analyzed in Figure 5 was kindly donated by Mustafa Tolay and Ekrem Ekinci of the University of Istanbul, Turkey. References (1) Giddings, J. C. Anal. Chem. 1984, 56, 1258 A-1270 A (2) Giddings, J. C. HRC CC, J. High Résolut. Chromatogr. Chromatogr. Commun. 1987,10,319-23. (3) Davies, I. L.; Bartle, K. D.; Williams, P. T.; Andrews, G. E. Anal. Chem. 1988, 60,204-9. (4) Hirschfeld, T. Anal. Chem. 1980, 52, 297 A-303 A. (5) Grob, K. On-Column Injection in Capillary Gas Chromatography: Basic Technique, Retention Gaps, Solvent Effects; Huthig: Heidelberg, F.R.G., 1987. (6) Jennings, W. In Sample Introduction in Capillary GC; Sandra, P., Ed.; Huthig: Heidelberg, F.R.G., 1985, p. 23. (7) Grob, K., Jr.; Walder, Ch.; Schilling, B. HRC CC, J. High Résolut. Chromatogr. Chromatogr. Commun. 1986,9,95-101. (8) Grob, K.; Muller, E. HRC CC, J. High Résolut. Chromatogr. Chromatogr. Commun., in press. (9) The Concise Oxford Dictionary, 7th ed; Sykes, J. B., Ed.; Clarendon: Oxford, U.K., 1984. (10) Cram, S. P.; Brown, A. C, III; Freitas, E.; Majors, R. E.; Johnson, E. L. Abstracts of Papers, Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, Cleveland, Ohio; 1979; Abstract 115. (11) Majors, R. E.; Johnson, E. L.; Cram, S. P.; Brown, A. C, III; Freitas, E. Abstracts of Papers, Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, Cleveland, Ohio; 1979, Abstract 116. (12) Apffel, J. Α., Jr. Ph.D. Dissertation, Virginia Polytechnic Institute and State University, 1982. (13) Raglione, T. V.; Hartwick, R. H. Anal. Chem. 1986,58,2680-83. (14) Raglione, T. V.; Troskosky, J. Α.; Hartwick, R. A. J. Chromatogr. 1987,409, 213-21. (15) Grob, K., Jr.; Frohlich, D.; Schilling, B.; Neukom, H.; Nageli, P. J. Chroma-
