engleski

Sequential determination of 90Sr and 210Pb in bone samples using molecular recognition

Both radioactive isotopes, 210Pb and 90Sr, accumulate in bones and procedures for their determination usually include radiochemical methods prior their detection. This work describes a novel method for simultaneous determination of 210Pb and 90Sr in bone samples by using molecular recognition technology product AnaLig®Sr-01 gel, commercially available from IBC’s Technologies Inc. This material is initially used for strontium isolation. Important drawback is that it also binds lead ions. This fact is used to develop a simple and rapid method for their simultaneous determination. The use and effectiveness of AnaLig®Sr-01 gel was validated by analysis of certified reference animal bone material, supplied by International Atomic Energy Agency (IAEA A-12) and 210Pb reference sample. The developed single column method was used to determine the activity concentrations of 90Sr and 210Pb in bones of wild boars, deers and goats from different regions of Slovakia and Croatia. The proposed simple and effective method can easily be implemented in any radiochemical laboratory and the obtained results could be used for monitoring environmental areas of interest. The recoveries of both isotopes were high in all tested samples, 100% for Pb and around 80% for Sr, which is very important in sense of low activity concentration of radionuclides in environmental samples. The activity concentration of 210Pb correlated good with age of the animal (R2 = 0.94), whereas of 90Sr no correlation was found (R2 = 0.05).

90Sr ; 210Pb ; Animal bones ; AnaLig®Sr-01 ; Separation

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