Determination of stable cesium and strontium in rice samples by inductively coupled plasma mass spectrometry

International Nuclear Science and Technology Conference 2016

Srinuttrakul, W.^1 ; Yoshida, S.^2

Thailand Institute of Nuclear Technology (Public Organization), 9/9 Mu 7 Sai Mun, Ongkharak, Nakhon Nayok

26120, Thailand^1

National Institutes for Quantum and Radiological Sciences and Technology, Anagawa 4-9-1, Inage-ku, Chiba-shi, Chiba

263-8555, Japan^2

关键词: Analytical method;    Dose assessments;    Exposure pathways;    Inductively coupled plasma mass spectrometries (ICPMS);    Nuclear power plant accident;    Polished rice;    Stable isotopes;    Standard reference material;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/860/1/012013/pdf
DOI  :  10.1088/1742-6596/860/1/012013

来源: IOP

【 摘 要 】

For long-term radiation dose assessment models, food ingestion is one of the major exposure pathways to human. In general, the stable isotopes can serve as analogues of radioisotopes. In this study, rice samples were collected from 30 paddy fields in Si Sa Ket, Yasothon and Roi Et in the northeast of Thailand in November 2014. The concentrations of stable cesium (Cs-133) and strontium (Sr-88) in polished rice were determined by inductively coupled plasma mass spectrometry (ICP-MS). The standard reference material of rice flour (NIST 1568a) with spiked Cs and Sr was used to validate the analytical method. The concentration of Cs in polished rice from Si Sa Ket, Yasothon and Roi Et was 0.158 ± 0.167 mg kg-1, 0.090 ± 0.117 mg kg-1and 0.054 ± 0.031 mg kg-1, respectively. The concentration of Sr in polished rice from Si Sa Ket, Yasothon and Roi Et was 0.351 ± 0.108 mg kg-1, 0.364 ± 0.215 mg kg-1and 0.287 ± 0.102 mg kg-1, respectively. Comparison of the results with Japanese data before the Fukushima Di-ichi nuclear power plant accident showed that the concentrations of both Cs and Sr for Thai rice were higher than those for Japanese rice.