50 research outputs found
Determination of selenium in biological materials by stable isotope dilution gas chromatography-mass spectrometry
Trace aluminum determination and sampling problems of archeological bone employing destructive neutron activation analysis
Determination of trace-level vanadium in marine biological samples by chemical neutron activation analysis
Rapid measurement of selenium in biological samples using instrumental neutron activation analysis
Determination of selenium metabolites in biological fluids using instrumental and molecular neutron activation analysis
Viscosity, calorimetric, and proton magnetic resonance studies on coal liquid fractions in solution
Determination of Selenium in Biological Materials by Stable Isotope Dilution Gas Chromatography-Mass Spectrometry
Selenium can be determined quantitatively in biological samples after digestion using nitric acid, orthophosphoric acid, and hydrogen peroxide and the formation of 5-nitropiazselenol. Samples are spiked with enriched 82Se and lsotoplc ratio of 80Se to 82Se is measured by combined gas chromatographymass spectrometry using dual ion monitoring. Precise determination at the parts-per-billion level is possible. The accuracy of the method Is verlfied by using standard reference materials