Interlaboratory comparison of 10Be concentrations in two ice cores from Central West Antarctica

To improve sample processing efficiency for cosmogenic radionuclide measurements in samples from the West Antarctic Ice Sheet Divide core, two chemical lines, one at Purdue University and one at the University of California, Berkeley, are being used. Sections from two shallow ice cores from West Antarctica were processed at each lab, while all 10Be accelerator mass spectrometry measurements were performed at PRIME Lab, Purdue University. Duplicate samples gave 10Be results that are identical to within the AMS measurement uncertainties of 2-3%.