Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) An alternative procedure for the 18O measurement of nitrate oxygen
Autor Bräuer, K.; Strauch, G.;
Journal / Serie Chemical Geology
Erscheinungsjahr 2000
Department HDG;
Band/Volume 168
Heft 3
Sprache englisch;
Keywords Carbon dioxide; Isotope fractionation; Nitrate; Oxygen isotopes
Abstract A new method for the preparation of nitrate samples for 18O measurement is presented. The technique utilizes guanidine hydrochloride to convert the nitrate oxygen to CO2. The 18O values of our KNO3 laboratory standard (K1) obtained by the guanidine method are compared with the results of the reaction of the potassium nitrate laboratory standard K1 with mercury cyanide and with the silver nitrate-graphite method. The 18O data produced by the high temperature (900oC) cyanide and graphite technique are comparable to the guanidine method only when the potassium nitrate is converted to silver nitrate.The reproducibility for the guanidine method is +/-0.2%% based on the tests carried out using KNO3 (laboratory standard, K1) and the IAEA-N3 reference material. The yield of the conversion of nitrate oxygen to CO2 is 95-100%.
ID 7035
dauerhafte UFZ-Verlinkung http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=7035
Bräuer, K., Strauch, G. (2000):
An alternative procedure for the 18O measurement of nitrate oxygen
Chem. Geol. 168 (3), 283 - 290