Ultima Gold LLT allows you to determine low levels of 3H in a wide range of water samples without requiring distillation. Ultima Gold LLT accepts up to 54% tap water, river water, rain water, and even sea water, with 3H counting efficiencies of approximately 30% and with very low background levels. When used with PerkinElmer's Tri-Carb time-resolved low-level liquid scintillation analyzers, backgrounds are reduced even further, resulting in minimum detectable activites of less than 1.1 Bq/L-1 (500 minus count time).