Extraction of toxic heavy metals using supercritical fluid carbon dioxide containing organophosphorus reagents

摘要

The feasibility of using Kelex 100, Cyanex 272, 301 and D2EHTPA as reagents for the supercritical fluid extraction of toxic heavy metals is demonstrated. High extraction efficiencies are observed for a range of heavy metals using Cyanex 301 and 302 and D2EHTPA ligands from a variety of matrices and from samples of high acidity. Extraction efficiencies increased with increasing pressure.