| 沈小磊,曾亚楠,姚誉阳,等.无锡市食品放射性水平γ能谱分析[J].中华放射医学与防护杂志,2026,46(2):198-204.Shen Xiaolei,Zeng Yanan,Yao Yuyang,et al.Gamma spectrometry of food samples for radioactivity in Wuxi city[J].Chin J Radiol Med Prot,2026,46(2):198-204 |
| 无锡市食品放射性水平γ能谱分析 |
| Gamma spectrometry of food samples for radioactivity in Wuxi city |
| 投稿时间：2024-12-13 |
| DOI：10.3760/cma.j.cn112271-20241213-00475 |
| 中文关键词: 食品 放射性污染 高纯锗γ谱仪 放射性水平 |
| 英文关键词:Foods Radioactive contamination HPGe gamma spectrometer Radioactivity level |
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| 中文摘要: |
| 目的 对无锡市食品放射性核素水平进行全面检测,为食品放射性水平监测积累基线数据。方法 基于高纯锗γ谱仪,对2023—2024年间无锡市采集的7大类共计28种食品进行放射性核素分析,测定其中40K、226Ra、238U、232Th、137Cs的含量,对比国内外相关标准以及我国不同地区食品中放射性核素含量,评估无锡市食品中放射性核素水平。结果 28份样品中可检出天然放射性核素40K、226Ra、238U、232Th以及人工放射性核素137Cs。40K的检出率为100%,226Ra的检出率为36%,238U的检出率为18%,232Th的检出率为36%,137Cs的检出率为14%。28份样品中40K的范围为(2.771 ~ 1 036.27)Bq/kg;226Ra含量范围为(0.018 ~ 4.863)Bq/kg;238U含量范围为(0.435 ~ 8.912)Bq/kg;232Th含量范围为(0.042 ~ 3.85)Bq/kg;检出137Cs的4份样品均为奶粉,137Cs的含量范围为(0.059 ~ 0.653)Bq/kg。结论 无锡市食品放射性核素水平均低于国内外标准限值,相较于我国其他地区处于正常水准。 |
| 英文摘要: |
| Objective Based on a high-purity germanium gamma spectrometer, 28 types of food samples collected in terms of seven broad categories in Wuxi city between 2023 and 2024 were analyzed for radioactivity, together with the contents of 40K, 226Ra, 238U, 232Th, and 137Cs measured, respectively. By comparing analytical result with domestic and international standards, together with the levels of radioactivity in food from different regions of China, the present study assessed the levels of radioactivity in foods in the city. Methods Totally 28 food samples collected during the period 2023-2024 were analyzed by using a HPGe gamma spectrometer. Results Only the natural radionuclides 40K, 226Ra, 238U, 232Th and the artificial radionuclide 137Cs were detected. The detection rate of radionuclides in samples was 40K 100%, 226Ra 36%, 238U in 18%, 232Th 36% and 137Cs 14%. Of 28 food samples, radioactivity content of 40K was from 2.771 to 1 036.27 Bq/kg, 226Ra 0.01 Bq/kg to 4.863 Bq/kg, 238U 0.435 to 8.912 Bq/kg, and 232Th 0.042 to 3.85 Bq/kg; 137Cs was detected only in four samples of milk powders, with a content from 0.059 to 0.653 Bq/kg. Conclusions The levels of radioactivity in foods in Wuxi are all lower than the limits given both in domestic and international standards. Rradioactivity levels in foods in the city are at the normal levels compared to other parts of China. |
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