Supercritical fluid extraction of metals in the presence of complexing agents for environmental monitoring, cleanup, and metals processing is now being extensively researched, and there is a need for solubility data of metal complexes. In this paper, the method used is the combination of a study of chromatographic retention over a wide range of pressures at 40, 50, 60, and 70 degrees C, followed by selected direct solubility measurements, to provide a comprehensive set of solubility results obtained with minimum effort. The method relies on the assumption that an inverse relationship exists between chromatographic retention and solubility in the mobile phase. This assumption is checked in this study. Results are presented for the solubility of ferrocene in supercritical carbon dioxide and a nickel complex, (5,7,12,14-tetramethyl-2,3:9, 10-dibenzo[b,i][1,4,8,11]tetraazacyclotetradecine)nickel(II)] in supercritical carbon dioxide modified with 10 vol % methanol.