Determination of selenium(IV) in seawater by gas chromatography after coprecipitation with hydrous iron(III) oxide
Journal Article
·
· Anal. Chem.; (United States)
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
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COPRECIPITATION
DATA
DERIVATIZATION
ELECTRON-CAPTURE DETECTORS
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
FILTRATION
GAS CHROMATOGRAPHY
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON COMPOUNDS
IRON OXIDES
MEASURING INSTRUMENTS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PRECIPITATION
QUANTITATIVE CHEMICAL ANALYSIS
RADIOMETRIC GAGES
SEAWATER
SELENIUM
SEMIMETALS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TRANSITION ELEMENT COMPOUNDS
WATER
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COPRECIPITATION
DATA
DERIVATIZATION
ELECTRON-CAPTURE DETECTORS
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
FILTRATION
GAS CHROMATOGRAPHY
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON COMPOUNDS
IRON OXIDES
MEASURING INSTRUMENTS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PRECIPITATION
QUANTITATIVE CHEMICAL ANALYSIS
RADIOMETRIC GAGES
SEAWATER
SELENIUM
SEMIMETALS
SEPARATION PROCESSES
SOLVENT EXTRACTION
TRANSITION ELEMENT COMPOUNDS
WATER