| 王延俊,张涵宇,王洁,等.甘肃兰州部分地区食品中放射性核素水平调查与分析[J].中华放射医学与防护杂志,2025,45(12):1223-1227.Wang Yanjun,Zhang Hanyu,Wang Jie,et al.Investigation of radioactivity levels in foods in some areas of Lanzhou, Gansu[J].Chin J Radiol Med Prot,2025,45(12):1223-1227 |
| 甘肃兰州部分地区食品中放射性核素水平调查与分析 |
| Investigation of radioactivity levels in foods in some areas of Lanzhou, Gansu |
| 投稿时间：2025-05-15 |
| DOI：10.3760/cma.j.cn112271-20250515-00170 |
| 中文关键词: 放射性核素 食品安全 高纯锗γ能谱仪 |
| 英文关键词:Radionuclides Food safty High purity germanium gamma spectrometer |
| 基金项目:甘肃省自然科学基金(23JRRA1798、22JR11RA183)；甘肃省卫生健康行业科研计划项目(GSWSKY2024-40) |
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| 中文摘要: |
| 目的 调查甘肃兰州部分地区食品中放射性核素水平以及不同品类食品中核素分布特征及潜在暴露风险。方法 2015—2022年连续采集甘肃兰州部分地区食品共168份，采用真空冷冻干燥技术对样品进行预处理，使用高纯锗γ能谱仪测量系统对样品中放射性核素131I、100Agm、58Co、60Co、134Cs、137Cs、238U、232Th、226Ra、40K水平进行测量分析。结果 放射性核素131I、100Agm、58Co、60Co、134Cs检出率均为0，137Cs、238U、232Th、226Ra、40K的检出率分别是26.79%、12.50%、26.19%、64.88%、100%；放射性核素131I、100Agm、58Co、60Co、134Cs的核素活度浓度均低于探测限，137Cs、238U、232Th、226Ra、40K活度浓度平均值分别为0.209±0.173、10.355±7.021、2.780±2.472、1.171±0.801和(205.7±118.2)Bq/kg(鲜重)，活度浓度范围分别是0.006~2.410、0.310~39.900、0.023~14.100、0.011~7.560、2.2~724.0 Bq/kg(鲜重)。结论 甘肃兰州地区不同品类食品中能检测出部分放射性核素，但核素水平均低于《食品中放射性物质限制浓度标准》(GB 14882-1994) 浓度限值，潜在风险较小。本次连续调查基本掌握了甘肃兰州部分地区食品中放射性水平，为建立放射性基线库提供了科学依据。 |
| 英文摘要: |
| Objective To investigate the radiactivity levels in foods in some areas of Lanzhou city, Gansu province, and the distribution characteristics of radionuclides in different categories of foods and potential exposure risks.Methods From 2015 to 2022, a total of 168 food samples were continuously collected from selected areas of Lanzhou. Samples were pretreated using a vacuum freeze-drying technique, and the activity concentrations of 131I, 100Agm, 58Co, 60Co, 134Cs, 137Cs, 238U, 232Th, 226Ra, and 40K were measured and analyzed using high-purity germanium (HPGe) gamma spectrometry.Results The detection rates for 131I, 100Agm, 58Co, 60Co, and 134Cs were all found to be zero and for 137Cs, 238U, 232Th, 226Ra, and 40K 26.79%, 12.50%, 26.19%, 64.88%, and 100%, respectively. The activity concentrations of 131I, 100Agm, 58Co, 60Co, and 134Cs were measured all to be below the detection limit. The average activity concentrations of 137Cs, 238U, 232Th, 226Ra, and 40K were 0.209±0.173, 10.355±7.021, 2.780±2.472, 1.171±0.801, and (205.7±118.2) Bq/kg (fresh weight), and the average activity concentration ranges were 0-2.410, 0.310-39.900, 0.023-14.100, 0.011-7.560, and 2.2-724.0 Bq/kg (fresh weight).Conclusions The result indicate that a number of radionuclides were detected in different categories of foods from Lanzhou city, but their radioactivity levels were all below the concentration limits specified in the national standard (GB 14882-1994), thus indicating a low potential exposure risk. This continuous investigation has essentially ascertained the radioactivity levels in local foods, providing a scientific basis for establishing a radioactivity baseline database. |
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