Simultaneous determination of arsenic and antimony species in environmental samples using bis(trifluoroethyl)dithiocarbamate chelation and supercritical fluid chromatography.
Simultaneous separation and quantitation of arsenic(III) and antimony(III) can be achieved by extraction with lithium bis(trifluoroethyl)dithiocarbamate followed by supercritical fluid chromatographic (SFC) analysis. Arsenic(V) and antimony(V) are extracted after reduction with potassium iodide and sodium thiosulfate. Detection limits of 7 pg As and 11 pg Sb are achieved using this extraction method and SFC. Application to natural water and biological sample analysis is discussed.
Laintz
K E
KE
Chemistry Department, University of Idaho, Moscow 83843.
Shieh
G M
GM
Wai
C M
CM
D000965:Antimony / Q000032:analysis* / Q000652:urine; D001151:Arsenic / Q000032:analysis* / Q000652:urine; D002614:Chelating Agents; D002853:Chromatography, Liquid / Q000379:methods*; D010944:Plants / Q000737:chemistry; D011193:Potassium Iodide; D013859:Thiocarbamates; D013885:Thiosulfates; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
D002614:Chelating Agents; D013859:Thiocarbamates; D013885:Thiosulfates; D014874:Water Pollutants, Chemical; D014867:Water; C063247:bis(trifluoroethyl)carbamodithioic acid; D011193:Potassium Iodide; D000965:Antimony; C017717:sodium thiosulfate; D001151:Arsenic