129I interlaboratory comparison:: Phase II results

Large discrepancies seen in a Phase I I-129 Accelerator Mass Spectrometry (AMS) interlaboratory comparison have prompted a subsequent Phase II comparison. In Phase II of the I-129 AMS interlaboratory comparison, three separate laboratories prepared AgI from two environmental samples (IAEA 375 soil and maple leaves). Each laboratory used its own chemical preparation method; each of these methods being considerably different. The resulting six samples (two sets of three) were then distributed to the participating I-129 AMS facilities and I-129/I-127 ratios measured. Results and discussion of the Phase II interlaboratory comparison are presented. (C) 2000 Elsevier Science B.V. All rights reserved.