||Determination of Metals in Solid Samples by Complexation: Supercritical Fluid Extraction and Gas Chromatography. Atomic Emission Detection.
Liu, Y. ;
Lopez-Avila, V. ;
Alcaraz, M. ;
Beckert, W. F. ;
Heithmar, E. M. ;
||Midwest Research Inst., Mountain View, CA. California Operations.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Metal complexes ;
Inorganic compounds ;
Complex compounds ;
Gas chromatography ;
Soil pollution ;
Remedial action ;
Toxic substances ;
SFE(Supercritical fluid extraction) ;
Supercritical fluid extraction ;
In situ analysis ;
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||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.
||Pub. in Journal of Chromatographic Science, v31 p310-316 August 1993. Sponsored by Environmental Monitoring Systems Lab., Las Vegas, NV.
|NTIS Title Notes
||Reprint: Determination of Metals in Solid Samples by Complexation: Supercritical Fluid Extraction and Gas Chromatography. Atomic Emission Detection.
||PC A02/MF A01