title: High accuracy method for the application of isotope dilution to gas chromatography/mass spectrometric analysis of gases.
abstract: A new isotope dilution mass spectrometry (IDMS) method for high-accuracy quantitative analysis of gases has been developed and validated by the analysis of standard mixtures of carbon dioxide in nitrogen. The method does not require certified isotopic reference materials and does not require direct measurements of the highly enriched spike. The relative uncertainty of the method is shown to be 0.2%. Reproduced with the permission of Her Majesty's Stationery Office.
authors.affiliation: Analytical Science Group, National Physical Laboratory, Teddington TW11 0LW, UK. martin.milton@npl.co.uk
authors.forename: Martin J T
authors.initials: MJ
authors.lastname: Milton
authors.forename: Jian
authors.initials: J
authors.lastname: Wang