Determination of the Radioactivity in the Turkish Tea Samples

Natural and artificial radioactivity concentrations of the Turkish tea samples were determined using 20% n-type HPGe gamma-ray spectrometer. 238U, 226Ra, 232Th, 228Ra, 228Th, 40K, 210Pb, 7 Be and 137Csradioactivity concentrations were measured. 238U, 226Ra, 232Th, 228Ra, 228Th radioactivity concentrations were MDA. 7 Be, 210Pb, 40K and 137Cs radioactivity concentrations mean values were found 30.8 ± 2.3, 49.4 ± 4.4, 485.4±38.6 and 38.8±2.4 Bq kg-1, respectively.

Türk Çayı Örneklerinde Radyoaktivitenin Belirlenmesi

Türk çayı örneklerinin doğal ve yapay radyoaktivite konsantrasyonları %20 n-tipi HPGe dedektör kullanılarak belirlenmiştir. 238U, 226Ra, 232Th, 228Ra, 228Th, 40K, 210Pb, 7 Be ve 137Csradyoaktivite konsantrasyonları ölçülmüştür. 238U, 226Ra, 232Th, 228Ra, 228Th radyoaktivite konsantrasyonları MDA bulunmuştur. 7 Be, 210Pb, 40K ve 137Cs radyoaktivite konsantrasyonlarının ortalama değerleri sırasıyla 30.8 ± 2.3, 49.4 ± 4.4, 485.4±38.6 ve 38.8±2.4 Bq kg-1 bulunmuştur.

Kaynakça

Bourcier, L. Masson,O. Laj,P. Paulat ,P. Pichon,J.-M. Chausse, P. Gurraran ,R. Sellegri, K. 2014. 7 Be, 210Pb and 137Cs concentrations in cloud water. J. Environ. Radioact., 128: 15- 19.

Currie, L.A. 1968. Limits for qualitative detection and quantitative determination. Application to radiochemistry. Anal. Chem., 40 (3): 586–593.

Desideri, D. Meli, M.A.. Roselli, C. Feduzi, L. 2011. Alpha and gamma spectrometry for determination of natural and artificial radionuclides in tea, herbal tea and camomile marketed in Italy. Microchem. J., 98: 170–175.

Di Gregorio, D.E. Huck, H. Aristegui, R. De Lazzari, G. 2004. 137Cs contamination in tea and yerba mate in South America. Jech A. J. Environ. Radioact.,76:273–281.

E.C. 1990. European Council Regulation No: 737/90.

Gilmore, Gordon R. 2008. Practical Gamma-ray Spectrometry –2nd Edition, 318, 320.

Görür, F. K. Keser, R. Akçay, N. Dizman,S. Okumuşoğlu, N. T. 2011. Radionuclides and heavy metals concentrations in Turkish market tea. Food Control, 22: 2065-2070.

Harb S. 2007. Measurement of the radioactivity of 238U, 226Ra, 210Pb, 228Th, 232Th, 228Ra, 137Cs and 40K in tea using gamma-spectrometry. J. Radioanal. Nuc. Chem., 274: No.1: 63–66.

IAEA, 2005. International Atomic Energy Agency. Naturally occurring radioactive materials (NORM IV). IAEATECDOC-1472, Vienna.

IAEA, 2009. International Atomic Energy Agency. Quantification of Radionuclide Transfer in Terrestrial and Freshwater Environments for Radiological Assessments. TECDOC 1616, Vienna.

Kılıç, Ö. Belivermiş, M, Topçuoğlu, S. Çotuk, Y. 2009. 232Th, 238U, 40K, 137Cs radioactivity concentrations and 137Cs dose rate in Turkish market tea. Radiat. Eff. Defects Solids, 164(2): 138- 143.

Kim, K.J. Choi,Y. Yoon, Y.-Y. 2016. Monitoring 7 Be and tritium in rain water in Daejeon, Korea and its significance. Appl. Radiat. Isot., 109: 470–473.

MGM (Meteorologi Genel Müdürlüğü), 2015. Yılı Alansal Yağış Değerlendirmesi, 2015. http://www.mgm.gov.tr/ FILES/ arastirma / yagis-degerlendirme/2015alansal.pdf. Topcuoglu, S. Güngür, N. Köse, A. Varinlioglu A. 1997.

Translocation and depurtion of 137Cs in tea plants.J. Radioanal. Nucl. Chem., 218: 2: 263-266.

TÜİK ( Türkiye İstatistik Kurumu), Çay Üretimi, 2015. http:// www.tuik.gov.tr/PreIstatistikTablo.do?istab_id=1074.

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