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Errors in isotope ratios measured on a laser mass spectrometer with photographic recording

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Abstract

The random and systematic measurement errors were determined for tin isotope ratios measured by laser mass spectrometry with photographic recording. The analytical isotope signals were treated by the Hull equation using the widths of mass-spectrometric lines. This method significantly reduced the systematic measurement error in the isotope ratios and extended the working range of signal intensities (0.1 <T< 10). Within this range, the relative standard deviation (s r ) of the measured isotope ratios wass r < 0.15, and the relative systematic error was S < 0.15. For isotope lines with close signal intensities in the region of normal blackening of the photographic emulsion, the valuess r = 0.04-0.08 and δ = 0.01 were obtained. A discrimination effect was revealed for isotopes with large masses 120, 122, and 124 amu, which increased δ to 0.21

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  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 117907, Moscow, Russia

    G. I. Ramendik, V. S. Sevast’yanov & E. V. Fatyushina

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  1. G. I. Ramendik
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  2. V. S. Sevast’yanov
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  3. E. V. Fatyushina
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Ramendik, G.I., Sevast’yanov, V.S. & Fatyushina, E.V. Errors in isotope ratios measured on a laser mass spectrometer with photographic recording. J Anal Chem 55, 9–13 (2000). https://doi.org/10.1007/BF02757624

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