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RECORD NUMBER: 258 OF 846

OLS Field Name OLS Field Data
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.
Publisher Aug 93
Year Published 1993
Report Number EPA-68-C1-0029; EPA/600/J-94/288;
Stock Number PB94-191145
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)
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NTIS  PB94-191145 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/11/1994
Collation 8p
Abstract
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.