Design and Evaluation of a Freeze-Dry Apparatus for Removing Free Water for Tritium Analysis

摘要

A freeze-dry apparatus was constructed to remove free water from environmental samples for tritium analysis. The apparatus is self-contained, can process eight samples simultaneously, and, to avoid replenishment of the cold bath, uses a refrigeration system. Large samples (200 to 300 g) can be dried in about three days. To avoid fractionation of tritium during the distillation process, it was necessary to take the sample to dryness. (ERA citation 07:050969)