title: Making an honest measurement scale out of the oxygen isotope delta-values.
abstract: The differential measurement of the abundance of oxygen isotopes based on reference materials, such as VSMOW for the case of water, was used because the precision of the absolute mass-spectrometric determination of the abundance fell short of the differences to be measured. Since then these measurements have been much improved, so that a calibration scheme of the oxygen isotope abundance in water, carbonates, silica, phosphates, sulfates, nitrates and organic materials is suggested, based on an accredited primary standard of oxygen in air and using standard fluorination and O(2) to CO(2) conversion techniques.
authors.affiliation: Department of Environmental Sciences and Energy Research, The Weizmann Institute of Science, Rehovot, Israel. Joel.Gat@weizmann.weizmann.ac.il
authors.forename: Joel R
authors.initials: JR
authors.lastname: Gat
authors.forename: Paul
authors.initials: P
authors.lastname: DeBievre
mesh_terms: D002138:Calibration; D002245:Carbon Dioxide / Q000032:analysis; D007553:Isotope Labeling / Q000379:methods* / Q000592:standards; D013058:Mass Spectrometry / Q000379:methods; D010103:Oxygen Isotopes / Q000032:analysis* / Q000592:standards; D012015:Reference Standards; D015203:Reproducibility of Results; D014867:Water / Q000737:chemistry
chemical_list: D010103:Oxygen Isotopes; D014867:Water; D002245:Carbon Dioxide