| Autor: |
Steeb, J. L., Graczyk, D. G., Tsai, Y., Mertz, C. J., Essling, A. M., Sullivan, V. S., Carney, K. P., Finck, M. R., Giglio, J. J., Chamberlain, D. B. |
| Předmět: |
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| Zdroj: |
JAAS (Journal of Analytical Atomic Spectrometry); Sep2013, Vol. 28 Issue 9, p1493-1507, 15p |
| Abstrakt: |
Application of an isotope-dilution method for determining 90Zr and 90Sr in a 90Sr source material spiked with 86Sr and 92Zr is described. A miniature gas pressurized extraction chromatography (GPEC) system with a column containing Eichrom Sr Resin™ was used for separating the elements so isobaric isotopes could be measured by mass spectrometry. Zirconium was rinsed through the column with 3 M HNO3/trace HF and strontium was eluted with 1% acetic acid. Two mass spectrometric techniques, inductively coupled plasma mass spectrometry (ICP-MS) and thermal ionization mass spectrometry (TIMS), were used for measuring isotope ratios. Data were obtained with 90Sr from a blood-irradiator source. Results from the TIMS measurements gave a decay time of 45.16 ± 0.26 years, and those from the ICP-MS gave 45.24 ± 0.20 years (uncertainties are expanded uncertainty, k = 2). Quadrupole ICP-MS is preferable to TIMS in this application if the ICP-MS data are suitably corrected for non-linearity and mass discrimination. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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