Isotope dilution mass spectrometry : What can it contribute to accuracy in trace analysis?
Isotope Dilution Mass Spectrometry determines the number of atoms of an isotope in a sample by comparison with a spiked sample containing a known quantity of an otherwise absent isotope of the same element. To yield a completely "transparent" picture of the measurement process, errors or defects in ion source or collector processes must be fully identified, to establish the uncertainty of the measurement. This report illustrates how an "uncertainty budget" can be drafted, to identify possible deviations, estimate their maximum size, correct for them and finally estimate the extent of the remaining uncertainties. The essential procedures for the chemical preparation of samples are also described, together with second order refinements. With this approach it is possible to cross the 0.1% total uncertainty "barrier" of quantitative analysis even in trace analysis.
Bibliographic Reference: Paper presented: 11th International Symposium on Microchemistry, Wiesbaden (DE), Aug. 28-Sept. 1, 1989
Availability: Available from (1) as Paper EN 35013 ORA
Record Number: 199010060 / Last updated on: 1994-12-01
Original language: en
Available languages: en