STUDY OF THE METHOD OF COMPLEXATION-SUPERCRITICAL FLUID EXTRACTION OF COPPER IONS WITH 8-HYDROXYQUINOLINE

Abstract

8-Hydroxyquinoline, methanol, and Triton X-100 were first used together in the extraction of metal ions by supercritical fluid. In the new system, the effects of pressure, temperature, and the volume of supercritical CO₂ used on the efficiency of supercritical fluid extraction (SFE) were systematically investigated. The recovery of Cu²⁺ was only 17.7% by pure supercritical CO₂ while the recovery increased significantly (83.6%, RSD=3.64%, n=5) with the addition of a suitable amount of methanol (v/v=5%).

In order to further enhance the recovery, a suitable amount of Triton X-100 was added to the samples, and the results were favorable (96.6%, RSD=2.76%, n=5).

Acknowledgments