Citation: Zhao Jie CUI, Jun Cheng LIU, Lain Cun GAO, Ying Qin WEI, Jun Zeng ZHANG. Study on a New Method of Extraction of Metal Ions from Solid Matrices by Supercritical Fluid[J]. Chinese Chemical Letters, ;1999, 10(6): 525-528. shu

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

Department of Environmental Engineering, Shandong University, Jinan 250100

Received Date: 18 December 1998

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 recovery Triton X-100 was added to the samples, and the results were satisfactory (96.62%. RSD=2.85%. n=5).
- Supercritical fluid extraction,
- chelating agent,
- modifier,
- surfactant,
- metal ions,
- solid matrices
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