Study on a New Method of Extraction of Metal Ions from SolidMatrices by Supercritical Fluid

摘要

8-Hydroxyquinoline. methanol and Triton-100 were first used together in the extraction of metal ions by supercritical CO2. In the new system. the effects of pressure, temperature and the volume of CO2 on the efficiency of supercritical fluid extraction (SFE) were systematically investigated. The recovery under the optimum condition was only 11.38%. but if suitable concentration of methanol (v/v=5%) was added to the supercritical CO2, the recovery was increased significantly (83.60%. RSD=4.37%. n=5). In order to further enhance the recoveryTriton X-100 was added to the samples. and the results were satisfactory (96.62%. RSD=2.85%.n=5).