The method we proposed using their boiling point differences are processed during the vacuum distillation, thus was expected to reduce the enrichment processing time, however it was not effective in enriching 3H. For the method using their melting point differences, we set a beaker of solidified 3H containing water at around 1 °C and let the ice liquefy. We assumed the portion liquefied first was H2O (melting point at 0.00 °C) and the remaining portion in the beaker had enriched 3H. This remaining portion was collected in a vial and its 3H concentration was measured. The remaining potion contained 1.10 times more 3H than before the procedure, showing a small enrichment effect. Our future research will focus on improving the enrichment factor.