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High precision mass

Different isotopes differ in their atomic masses. The intensities of the signals from different isotopic ions allow isotopic abundances to be determined with high accuracy. Mass spectrometry reveals that the isotopic abundances in elemental samples from different sources have slightly different values. Isotopic ratios vary because isotopes with different masses have slightly different properties for example, they move at slightly different speeds. These differences have tiny effects at the level of parts per ten thousand (0.0001). The effects are too small to appear as variations In the elemental molar masses. Nevertheless, high-precision mass spectrometry can measure relative abundances of isotopes to around 1 part in 100,000. [Pg.163]

Li WX, Lundberg J, Dickin AP, Ford DC, Schwarcz HP, McNutt R, Williams D (1989) High precision mass-spectrometric uranium-series dating of cave deposits and implications for paleoclimate studies. Nature 339 534-536... [Pg.403]

For this experiment Bainbridge used the high-precision mass spectrograph he had developed by combining a Wien filter with a 180° magnetic analyzer.13... [Pg.14]

Mook W. G. and Grootes P. M. (1973) The measuring procedure and corrections for the high-precision mass-spectrometric analysis of isotopic abundance ratios, especially referring to carbon, oxygen and nitrogen. Int. J. Mass Spectrom. Ion Phys. 12, 198-273. [Pg.2122]

The standard deviations of radioanalytical isotope ratio measurements are significantly higher than those obtained by high precision mass spectrometers. For example, Rade obtained a relative standard deviation of 0.5% for the ratio Sr/ Sr 5) For... [Pg.97]

RainviUe, S. Thompson, J.K. Pritchard, D.E. An ion balance for ultra-high-precision mass measurements. Science 2004, 303, 334—338. [Pg.325]

Accurate isotope ratios often require high-precision mass spectrometers. Instruments capable of such high precision are either ICP-TOF-MS or high-resolution magnetic sector ICP-MS instruments of either the single detector or multicollector type. An excellent fundamental... [Pg.815]

A high-precision mass measurement system with Penning traps, SHIPTRAP (Block et al. 2007) at GSI has been developed to investigate nuclear structure of rare isotopes far from stability. The direct mass measurements of have been successfiiUy performed (Block... [Pg.839]

C. Carlberg et a . SMILETRAP - A wide range high-precision mass spectrometer. IEEE Trans. Instrum. Meas. 44, 553 (1995)... [Pg.543]

High precision mass measurement may also be a useful tool in... [Pg.359]

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See also in sourсe #XX -- [ Pg.74 ]



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