High precision measurement of titanium isotope ratios by plasma source mass spectrometry

X. K. Zhu, A. Makishima, Y. Guo, N. S. Belshaw, R. K. O'Nions

    Research output: Contribution to journalArticlepeer-review

    30 Citations (Scopus)


    A method using multiple-collector inductively coupled plasma source mass spectrometry for the precise measurement of Ti isotope composition in natural materials has been developed. Instrumental mass discrimination is corrected using a "standard-sample bracketing" approach by expressing the isotope ratios of samples relative to those of the bracketing standard. Variations in 47Ti/46Ti, 48Ti/46Ti, 49Ti/46Ti and 50Ti/46Ti ratios of samples are expressed in ε units which are deviations in parts per 104 from the same isotope ratios of the reference material. The long-term repeatability at the 2 standard deviation level is 0.4, 0.6, 0.7 and 0.8 ε units in terms of 47Ti/46Ti, 48Ti/46Ti, 49Ti/46Ti and 50Ti/46Ti ratio measurements, respectively. The technique reported here makes it possible for the first time that both mass-dependent fractionation and isotope anomalies of Ti isotopes in natural materials can be measured to high precision.

    Original languageEnglish
    Pages (from-to)21-29
    Number of pages9
    JournalInternational Journal of Mass Spectrometry
    Issue number1
    Publication statusPublished - Sep 15 2002


    • Matrix effects
    • Plasma source mass spectrometry
    • Stable isotopes
    • Titanium isotopes
    • Transition metal

    ASJC Scopus subject areas

    • Instrumentation
    • Condensed Matter Physics
    • Spectroscopy
    • Physical and Theoretical Chemistry


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