title: Nanogram nitrite and nitrate determination in environmental and biological materials by vanadium (III) reduction with chemiluminescence detection.
abstract: Nitrite in environmental water samples is reduced at room temperature to nitric oxide in acidic medium containing vanadium (III). Nitrate is also rapidly reduced after heating to 80-90 degrees C. Nitric oxide is removed from the reaction solution by scrubbing with helium carrier gas and is detected by means of a chemiluminescence NOx analyzer. Nanogram detection limits are obtained. The method has the advantage of not requiring highly acidic solutions for nitrate reduction and has been applied to the analysis of a variety of environmental waters, sediment, plant materials, and human urine and blood serum.
authors.affiliation: Department of Chemistry, University of South Florida, Tampa 33620.
authors.forename: R S
authors.initials: RS
authors.lastname: Braman
authors.forename: S A
authors.initials: SA
authors.lastname: Hendrix
mesh_terms: D001826:Body Fluids / Q000032:analysis*; D006801:Humans; D008163:Luminescent Measurements; D009566:Nitrates / Q000032:analysis*; D009573:Nitrites / Q000032:analysis*; D010084:Oxidation-Reduction; D010944:Plants / Q000032:analysis; D014639:Vanadium; D014867:Water / Q000032:analysis*
chemical_list: D009566:Nitrates; D009573:Nitrites; D014639:Vanadium; D014867:Water