Record Display for the EPA National Library CatalogRECORD NUMBER: 1 OF 1
|Main Title||Determination of Metals in Solid Samples by Complexation: Supercritical Fluid Extraction and Gas Chromatography. Atomic Emission Detection.|
|Author||Liu, Y. ; Lopez-Avila, V. ; Alcaraz, M. ; Beckert, W. F. ; Heithmar, E. M. ;|
|CORP Author||Midwest Research Inst., Mountain View, CA. California Operations.;Environmental Monitoring Systems Lab., Las Vegas, NV.|
|Report Number||EPA-68-C1-0029; EPA/600/J-94/288;|
|Additional Subjects||Chromatography ; Extraction ; Metal complexes ; Ions ; Inorganic compounds ; Copper ; Cobalt ; Cadmium ; Zinc ; Complex compounds ; Gas chromatography ; Soil pollution ; Remedial action ; Toxic substances ; Reprints ; SFE(Supercritical fluid extraction) ; Supercritical fluid extraction ; In situ analysis ; FDDC(Bis(trifluoroethyl)dithiocarbamate)|
Complexation followed by Supercritical fluid extraction (SFE) has been investigated for the extraction of Cu(2+), Co(2+), and Zn(2+) ions from solid samples. Lithium bis(trifluoroethyl)dithiocarbamate (FDDC) was used as the complexing agent in the study. The metal-FDDC complexes in the SFE extracts were determined by gas chromatography (GC) with atomic emission detection. The recoveries of Cu(2+), Co(2+), Cd(2+), and Zn(2+) ions from filter paper, sand, and silica gel ranged from 70 to 100 percent. Relatively high concentrations of complexed Cu, Co, Cd, and Zn found in system blanks obtained with a stainless steel SFE system prompted the authors to modify the apparatus by using nonmetalic polyetheretherketone (PEEK) components.