WO2007147554-A2  ARNE STABY, JORGEN MOLLERUP: "SEPARATION OF CONSTITUENTS OF FISH-OIL USING SUPERCRITICAL FLUIDS - A REVIEW OF EXPERIMENTAL SOLUBILITY, EXTRACTION, AND CHROMATOGRAPHIC DATA" FLUID PHASE EQUILIBRIA, vol. 91, no. 2, 1993, pages 349-386, XP009071250;  SAITO S: "Research activities on supercritical fluid science and technology in Japan - A review" JOURNAL OF SUPERCRITICAL FLUIDS, vol. 8, no. 3, September 1995 (1995-09), pages 177-204, XP002463504;  SMITH R M: "Supercritical fluids in separation science - the dreams, the reality and the future" JOURNAL OF CHROMATOGRAPHY A, ELSEVIER, AMSTERDAM, NL, vol. 856, no. 1-2, 24 September 1999 (1999-09-24), pages 83-115, XP004180076 ISSN: 0021-9673;  HIGASHIDATE S, YAMAUCHI Y, SAITO M: "ENRICHMENT OF EICOSAPENTAENOIC ACID AND DOCOSAHEXAENOIC ACID-ESTERS FROM ESTERIFIED FISH OIL BY PROGRAMMED EXTRACTION ELUTION WITH SUPERCRITICAL CARBON-DIOXIDE" JOURNAL OF CHROMATOGRAPHY, vol. 515, 31 August 1990 (1990-08-31), pages 295-303, XP002463503;  ALKIO M ET AL: "Purification of polyunsaturated fatty acid esters from tuna oil with supercritical fluid chromatography" JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY, AOCS PRESS, CHAMPAIGN, IL, US, vol. 77, no. 3, 2000, pages 315-321, XP002954048 ISSN: 0003-021X;  ERNST KLESPER, FRANZ P. SCHMITZ: "Gradient Methods in Supercritical Fluid Chromatography" THE JOURNAL OF SUPERCRITICAL FLUIDS, vol. 1, 1988, pages 45-69, XP002395210;  MISHRA V K ET AL: "EXTRACTION AND PURIFICATION OF OMEGA-3 FATTY ACIDS WITH AN EMPHASIS ON SUPERCRITICAL FLUID EXTRACTION: A REVIEW" FOOD RESEARCH INTERNATIONAL, ELSEVIER APPLIED SCIENCE, BARKING, GB, vol. 26, no. 3, 1993, pages 217-226, XP008066737 ISSN: 0963-9969;  NAGAHAMA, SUZUKI, NORITOMI, KATO: "Separation of EPA and DHA from preconcentrated AgNO3 aqueous solution by supercritical CO2, C2H4, and C2H6" AICHE ANNUAL MEETING, 12 November 1993 (1993-11-12), XP009094119 St. Louis MO;  NILSSON W B GAUGLITZ E J HUDSON J K: "Supercritical fluid fractionation of fish oil esters using incremental pressure programming and a temperature gradient" JOURNAL OF THE AMERICAN OIL CHEMISTS' SOCIETY, AOCS PRESS, CHAMPAIGN, IL, US, vol. 66, no. 11, November 1989 (1989-11), pages 1596-1600, XP002954047 ISSN: 0003-021XUS8063235-B2  Alkio, M. et al. 2000 "Purification of polyunsaturated fatty acid esters from tuna oil with supercritical fluid chromatography" J American Oil Chemists 77:315-321.;  Higashidate, S. et al. 1990 "Enrichment of eicosapentaenoic acid and docosahexaenoic acid esters from esterified fish oil by programmed extraction-elution with supercritical carbon dioxide" J Chromatography 515:295-303.;  Klesper, E. et al. 1988 "Gradient methods in supercritical fluid chromatography" J Supercritical Fluids 1:45-69.;  Mishra, V.K. et al. 1993 "Extraction and purification of ~w-3 fatty acids with an emphasis on supercritical fluid extraction_A review" Food Res Int 26:217-226.;  Saito, S. 1995 "Research activities on supercritical fluid science and technology in Japan_A review" J Supercritical Fluids 8:177-204.;  Smith, R.M. 1999 "Supercritical fluids in separation science_the dreams, the reality and the future" J Chromatograpy A 856:83-115.;  Staby, A and Mollerup, J. 1993 "Separation of constituents of fish oil using supercritical fluids: A review of experimental solubility, extraction, and chromatographic data" Fluid Phase Equilibria 91:349-386.;  Nagahama, K. et al. 1993 "Separation of EPA and DHA from preconcentrated AgNO3 aqueous solution by supercritical CO2, C2H4 and C2H6" AlChE 1993 Annual Meeting, Nov. 12, 1993, St. Louis, MO.;  Nisson, W.B. et al. 1989 "Supercritical fluid fractionation of fish oil esters using incremental pressure programming and a temperature gradient" J American Oil Chemists 66:1596-1600.