| Li Yucheng,Yin Liangliang,Chen Fei,Shao Xianzhang,Shen Baoming,Kong Xiangyin,Ji Yanqin.Rapid measurement of 210Po in seafood with large area grid ionization chamber α spectrometry[J].Chinese Journal of Radiological Medicine and Protection,2015,35(5):367-370 |
| Rapid measurement of 210Po in seafood with large area grid ionization chamber α spectrometry |
| Received:February 17, 2015 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.05.013 |
| KeyWords:Large-area grid ionization chambers α spectrometry Polonium-210 Seafood |
| FundProject:This work was support by grand from Chinese Ministry of Science and Technology (2013BAK03B00,2014YF211000). |
| Author Name | Affiliation | E-mail | | Li Yucheng | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Yin Liangliang | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Chen Fei | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Shao Xianzhang | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Shen Baoming | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Kong Xiangyin | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Ji Yanqin | 100088 Beijing, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | jiyanqin@nirp.cn |
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| Abstract:: |
| Objective To develop a rapid and reliable method for determination of 210Po using large-area grid ionization chamber α spectrometry. Methods Samples were digested using a microwave digestion system. After preparation of sample source, the concentration of 210Po in clam was detected by large-area grid ionization chamber (φ 25 cm). 209Po tracer was used to obtain the recovery. Results Large-area grid ionization chamber could achieve better counting and α spectrum resolution when the optimized thickness was 250 μg/cm2. By spiking 209Po tracer in clam, the minimum detectable activity was 9.870×10-4 Bq and the recovery of 210Po was 98%. Conclusions Compared with the traditional method, the developed method can avoid separation process, using less quantity of sample (0.2-0.5 g dry) and simplify the measurement process. This method may be has broad application prospects. |
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