Determination of Radio Strontium (90Sr) in Milk and Milk Powder Samples Used in Tehran and Calculation of Resulted Annual Dose
Radio Strontium (90Sr) is an artificial radioisotope and because of its chemical and biochemical similarities to calcium it is a bone seeker element which is biologically hazardous due to its long physical and biological half-life. In this research thirty eight different milk and milk powder samples from Tehran-Iran were collected and analyzed for 90Sr activity using a method in which the daughter product of 90Sr decay (90Y) was extracted by tributyl phosphate (TBP) from ashed milk. 90Y was then back extracted with water and oxalate precipitation was done. Following the sample analyzing, beta counting was performed with an ultra low level liquid scintillation spectrometer. The quality control and assurance of the method were obtained by standard samples prepared with an IAEA certified reference material. Finally comparison of the mean determined 90Sr activity concentration in our milk and milk powder samples (0.225±0.042 and 0.216±0.024 Bq.kg-1, respectively) with the health physics limitations showed that radioactivity concentration in our samples was too low to induce biological hazards but the research gave a suitable view of the background level of contamination.
Strontium-90 Milk Effective dose Activity determination Iran
Parviz ABDOLMALEKI Neda SARAYEGORD AFSHARI Fereshteh ABBASISIAR Ali ATTAILAR
Facultry of Science (Department of Biophysics),Tarbiat Modares University,P.O. Box 14115/175,Tehran, Environmental Radiation Protection Division,National Radiation Protection Department (NRPD),Atomic E Environmental Radiation Protection Division,National Radiation Protection Department (NRPD),Atomic E
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
307-312
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）