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Determination of 90Sr in milk and milk powder in Tehran and estimation of annual effective dose

Author

Listed:
  • Neda Saraygord-Afshari

    (Tarbiat Modares University)

  • Fereshteh Abbasisiar

    (National Radiation Protection Department (NRPD)
    Atomic Energy Organization of Iran (AEOI))

  • Parviz Abdolmaleki

    (Tarbiat Modares University)

  • Mahdi Ghiassi-Nejad

    (Tarbiat Modares University)

  • Ali Attarilar

    (National Radiation Protection Department (NRPD)
    Atomic Energy Organization of Iran (AEOI))

Abstract

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 from ashed milk. 90Y was then back extracted with water, and oxalate was precipitated . Following the sample analyzing, beta counting was performed with an ultralow-level liquid scintillation spectrometer. The quality control and assurance of the method were obtained by standard samples prepared with an IAEA-certified reference material. The mean determined 90Sr activity concentration in the analyzed milk and milk powder (0.225 ± 0.042 and 0.216 ± 0.024 Bq kg−1, respectively) showed that the radioactivity concentration in our samples was too low to induce biological hazards. These data can provide useful information of the background level of contamination, which in turn can be used in the following environmental monitoring programs.

Suggested Citation

  • Neda Saraygord-Afshari & Fereshteh Abbasisiar & Parviz Abdolmaleki & Mahdi Ghiassi-Nejad & Ali Attarilar, 2011. "Determination of 90Sr in milk and milk powder in Tehran and estimation of annual effective dose," Environment Systems and Decisions, Springer, vol. 31(3), pages 308-314, September.
    • Handle: RePEc:spr:envsyd:v:31:y:2011:i:3:d:10.1007_s10669-011-9337-6
    DOI: 10.1007/s10669-011-9337-6
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