XÁC ĐỊNH HOẠT ĐỘ PHÓNG XẠ TRITI (3H) TRONG MẪU NƯỚC BẰNG PHƯƠNG PHÁP ĐẾM NHẤP NHÁY LỎNG - TRI-CARB 3180TR/SL

Tóm tắt

      Triti is a radioactive isotope that occurs in the environment and is associated with the interaction of cosmic rays in the atmosphere. However, the most significant sources of triti in the environment results from nuclear weapons testing in the atmosphere carried out during the late 1950s and early 1960s. Today, the most important new sources of triti in the environments, such as power stations, processing and using of isotopes released the local triti. The objective of this study is the application of the liquid scintillation technique to triti analysis in water samples (rain, and surface waters). Following the Eichrom Triti Column technique, an aliquot of the passed triti resin sample (10 mL) is mixed with 10 mL of scintillation cocktail (Ultima Gold LLT, Packard) in 20-mL plastic- container vials and the sample activity is determined using a liquid scintillation spectrometer, Tri-carb 3180TR/SL. Counting efficiency is evaluated with internal standards. The triti activity concentrations of water samples that were collected from Dalat, Lamdong range between 0 to 8.4 TU.

Key word: Triti in water samples, Eichrom‟s Triti Column, TRI-CARB 3180TR/SL.