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Sains Malaysiana 42(3)(2013):
319–323
Radionuclides Level and its Radiation Hazard Index in Some Drinks Consumed in the Central Zone of Malaysia
(Aras Radionuklid dan Indeks
Bahaya Sinaran dalam Beberapa Minuman yang Terdapat
di Zon Tengah
Malaysia)
A.A. Tawalbeh, S.B. Samat*
& M.S. Yasir Universiti
Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
Received: 13 October
2011 / Accepted: 18 September 2012
ABSTRACT
Fifty three samples of different
types of imported and locally produced drinks consumed in the central zone of
Malaysia were analyzed using gamma-ray spectrometry system equipped with a high
purity germanium (HPGe)
detector. The activity concentrations of the natural radionuclides 238U, 232Th
and 40K present in the studied
samples were measured and the radium equivalent activities Raeq were calculated. In addition, the radiation hazard index (HI) was calculated. The average
concentrations of 238U, 232Th and 40K
were 0.69 ± 7×10¯4 , 1.3
± 8×10¯4 and 20.52 ± 6×10¯4 Bq/Kg, respectively. The values
of Raeq were between 0.002 and 10.0 Bq/kg. The HI were between 0.002 and 0.03, which is
below one (the higher limit of HI).
The results obtained were compared to the standard accepted international
values and found to be within the acceptable limits.
Keywords: Activity concentration; NORM; radiation hazard index;
radium equivalent; 238U, 232Th and 40K
ABSTRAK
Lima puluh tiga sampel daripada
pelbagai jenis minuman tempatan dan import yang terdapat di zon tengah Malaysia
dianalisis menggunakan sistem spektroskopi sinar dengan pengesan germanium
berketulenan tinggi (HPGe).
Kepekatan radionuklid, tabii 238U, 232Th dan 40K
dalam sampel diukur dan setara radium Raeq dikira.
Selain itu, indeks bahaya sinaran (HI)
juga dikira. Kepekatan aktiviti 238U, 232Th dan 40K
dalam sampel berada dalam julat 0.69 ±7×10¯4 , 1.3 ±8×10¯4 dan
20.52 ± 6×10¯4 Bq/Kg.
Nilai Raeq berada dalam julat
antara 0.002 dan 10.0 Bq/kg. Indeks bahaya sinaran (HI) berada dalam julat antara
0.002 dan 0.03, kurang daripada satu (had atas HI). Keputusan yang diperoleh dibandingkan dengan piawai di
peringkat antarabangsa dan didapati berada dalam julat yang boleh diterima.
Kata
kunci: Indeks bahaya sinaran; kepekatan aktiviti; kesetaraan radium; NORM; 238U, 232Th dan 40K
REFERENCES
Frame, P.
2006. Radium Equivalent Health Physics Society: http//hps.org/.
Jabbar, T., Akhter, P., Khan, K., Jabbar, A. & Saleem, K.
2009. Radiological impact of composite food served at PINSTECH. Food
and Chemical Toxicology 47: 1205-1208.
Laili, Z.,
Omar, M., Othman, M., Elias, S., Phillip, E., Ibrahim, M., Abdul Razalim, F.
& Hassan, A. 2006. Radionuclides concentrations in foods
in peninsular Malaysia. MINT R&D Seminar, 11-14 September. Malaysian
Institute for Nuclear Technology Research, Bangi, Selangor.
MHO. 2006. Ministry
of Health Malaysia and Food Safety Quality. Food consumption statistics for
central zone for adult population aged 18-59 years.
Omar, M.
1993. Radium activity in the steel in Malaysia. Malaysian
Nuclear Science Journal 11: 181-183.
Quan, W., Hongada, Z., Tiqiang, F. & Qingfen, L. 2008. Re- estimation of internal dose frome natural radionuclides for
Chinese adult men. Radiation Protection Dosimetry 130: 434- 441.
Samat, S.B.
& Evans, C.J. 2011. Determination of any radiation hazard arising from the 40Kcontent of bottled mineral
water in Malaysia. Sains Malaysiana 40(12): 1355-1358.
Tufail, M.,
Iqbal, M. & Mirza, S. 2000. Radiation doses due to the natural
radioactivity in Pakistan Marble. Radioprotection 35: 299-310.
Turner, J.E.
1995. Atoms, Radiation and Radiation Protection. 2nd ed.
New York: John Wiley & Sons.
UNSCEAR.
2000. Sources and effects of ionizing radiation. Report to General Assembly,
with Scientific Annexes. United Nation, New York.
Yasir, M., Ab Majid, A. & Yahaya, R. 2007. Study of natural
radionuclides and its radiation hazard index in Malaysia building materials. Radioanalytical
and Nuclear Chemistry 273: 539-541.
*Corresponding author; email: sbsamat@ukm.my
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