| Chen Fei,Yin Liangliang,Kong Xiangyin,Xu Ying,Zhang Yao,Shao Xianzhang,Ji Yanqin.90Sr in Chinese tea of typical regions: activity concentration and hygienic evaluation[J].Chinese Journal of Radiological Medicine and Protection,2017,37(5):367-371 |
| 90Sr in Chinese tea of typical regions: activity concentration and hygienic evaluation |
| Received:February 26, 2017 |
| DOI：10.3760/cma.j.issn.0254-5098.2017.05.009 |
| KeyWords:90Sr Di(2-ethylhexyl)phosphate Extraction chromatography Chinese tea Dose |
| FundProject:National Science and Technology Basic Work Program (2014YF211000) |
| Author Name | Affiliation | E-mail | | Chen Fei | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Yin Liangliang | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Kong Xiangyin | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Xu Ying | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Zhang Yao | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Shao Xianzhang | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | | | Ji Yanqin | 100088 Beijing, Key Laboratory of Radiological Pretection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention | jiyanqin@nirp.cn |
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| Abstract:: |
| Objective To investigate the activity concentration of 90Sr in tea produced in Chinese typical regions, enrich the baseline data for 90Sr level in Chinese tea, and evaluate possible exposure doses to people. Methods Samples were carbonized, ashed, digested and leached, and then extraction chromatography method was used to separate 90Sr and 90Y. After preparation of sample source, radioactivity of 90Y was measured using low-level α/β counter. Results Twenty six kinds of tea produced in 16 typical regions from 26 cities of 16 provinces were collected in 2016, and their 90Sr activity concentrations were analyzed using the separation method of di(2-ethylhexyl) phosphate (HDEHP) extraction chromatography. The results revealed that the activity concentrations in 26 kinds of tea samples ranged from 0.28 to 3.78 Bq/kg, and contributed possible exposure doses of 0.44×10-2- 6.00×10-2 μSv to each people. Conclusions These doses were far less than the ICRP annual dose limit of 1 mSv for the public, suggesting less impact on people's health. |
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