Chemistry 1 (2015 8) 129-136 ~ ~ ~ УДК 622.24.065 Development of Methods for the Preparation of Process Solutions for the Determination of Natural Radionuclides and Tritium Lydia G. Bondarevaa,b b * and Ivan G. Tananaevc aSiberian Federal University 79 Svobodny, Krasnoyarsk, 660041, Russia Igarka’s Permafrost Laboratory of the Permafrost Institute SB RAS 8 1st md., Igarka, 663200, Russia c Ozerskii Institute of Technology Branch of the National Research Nuclear University Moscow Institute of Physics and engineer 48 Pobedy, Ozersk, 456783, Russia Received 02.11.2014, received in revised form 12.12.2014, accepted 20.01.2015 Drilling water of the Siberian oil deposits and that from the ground waters of Yakutia are the objects of study. <...> Tritium has been determined by liquid scintillation spectrometry with inductively coupled plasma and the element content – by mass spectrometry. <...> Special equipment has been developed which allows managing little or no change in the physical properties of the fl uids and separating the main salt matrix (inorganic salts, trace of oil and polymers) of the determined submicro elements and radionuclides (uranium, thorium and tritium isotopes). <...> The development of the equipment has signifi cantly improved the detection limit of uranium (20 ng/L), thorium (10 ng/L) and tritium (1 Bq/L), with the effi ciency being 27 %. <...> All rights reserved * Corresponding author E-mail address: lydiabondareva@gmail.com # 129 # Lydia G. Bondareva and Ivan G. Tananaev. <...> Development of Methods for the Preparation of Process Solutions… <...> Разработка методики для подготовки технологических растворов для определения естественных радионуклидов и трития Л.Г. Бондареваа,б *, И.Г. Тананаевв аСибирский федеральный университет Россия, 660041 <...>