An application of nitrogen microwave-induced plasma mass spectrometry to isotope dilution analysis of selenium in marine organisms.
Nitrogen microwave-induced plasma mass spectrometry was studied for its applicability to the isotope dilution analysis of selenium in biological samples. Spectroscopic interference by calcium, which is present in high concentrations in biological samples, was investigated. No detectable background spectrum was observed for the major selenium isotopes of 78Se and 80Se. No detectable interferences by sodium, potassium, calcium and phosphorus on the isotope ratio 80Se/78Se were observed up to concentration of 200 mg/ml. The method was applied to the analysis of selenium in biological reference materials of marine organisms. The results showed good agreement between the certified and found values.
Shirasaki
T
T
Hitachi Instruments Engineering Co. Ltd., Hitachinaka.
Yoshinaga
J
J
Morita
M
M
Okumoto
T
T
Oishi
K
K
D000818:Animals; D049872:Bivalvia; D005399:Fishes; D007202:Indicators and Reagents; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D008872:Microwaves; D008121:Nephropidae; D009584:Nitrogen / Q000737:chemistry*; D011865:Radioisotope Dilution Technique; D012015:Reference Standards; D012643:Selenium / Q000032:analysis*; D012644:Selenium Radioisotopes / Q000032:analysis
D007202:Indicators and Reagents; D012644:Selenium Radioisotopes; D012643:Selenium; D009584:Nitrogen