Beryllium isotope analysis is an analytical method used to measure the relative or absolute abundances of beryllium isotopes, most commonly cosmogenic radionuclide ¹⁰Be and stable ⁹Be, in geological, environmental, or extraterrestrial samples. The technique typically involves chemical separation of Be from sample matrices using ion-exchange chromatography, followed by quantification with accelerator mass spectrometry (AMS) or, less commonly, thermal ionization or inductively coupled plasma mass spectrometry. Resulting ¹⁰Be/⁹Be or ¹⁰Be concentrations are used to constrain surface exposure ages, erosion rates, sediment transport timescales, and paleoenvironmental processes, requiring careful correction for production rates, inheritance, decay, and blank contributions.
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