Abstract

We report a procedure for the carrier-free extraction of microgram quantities of iodine for AMS measurements. The procedure relies on the affinity of molecular iodine for silver. Thus, by forming molecular iodine in aqueous solution and adding silver powder, the iodine reacts with the silver, which can then be loaded into a cathode of the normal AMS sputter ion source. Although the procedure was developed for seawater, it can be applied to any sample in which the iodine can be brought into aqueous solution.

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