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Determination of selenium(IV) in seawater by gas chromatography after coprecipitation with hydrous iron(III) oxide

Journal Article · · Anal. Chem.; (United States)
DOI:https://doi.org/10.1021/ac00275a013· OSTI ID:5959602
Selenium(IV) concentration in seawater was determined by gas chromatography with electron capture detection after coprecipitation with hydrous iron(III) oxide. Quantitative precipitation of Se(IV) was obtained at pH 5.0. Following a brief, 15 min, stirring and setting period, the coprecipitate was filtered and dissolved in hydrochloric acid. Selenium was derivatized to 5-nitroplazselenol, extracted into toluene and introduced into the chromatograph. The detection limit was 1 pg injected or 5 ng of Se/L of seawater using a 200-mL sample. The precision was 6% at the 0.025 ..mu..g of Se/L level.
Research Organization:
National Research Council of Canada, Ottawa, Ontario
OSTI ID:
5959602
Journal Information:
Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:11; ISSN ANCHA
Country of Publication:
United States
Language:
English