摘要
文章简要介绍了我们研究组近3年在^(129)I加速器质谱应用和分析方法方面的部分研究结果。测定了核前黄土样品中^(129)I水平,为地质定年的探索奠定了一定的基础;通过抽样分析检测了我国某核电站核环境安全的状况,结果表明当前它与大气沉降的本底水平一致,环境是安全可靠的;建立了水样、土壤、植物等不同类型样品中碘的分离、制备以及^(129)I加速器质谱测试方法,尤其对无载体微量碘分离、制备和其中^(129)I测量进行了探索,解决了超痕量碘样品的制备难题;此外,对实验用的试剂以及食用碘盐等进行了检验,示踪了不同来源的碘,为数据的可靠和问题的分析提供了保障。结果显示,^(129)I既是一个地质、环境示踪的有效工具,又具有定年的潜力和广阔的应用前景。
The authors briefly reported some results of ^129I applications to the environmental and geological studies and progress of ^129I analytical method in the past 3 years. A level of ^129I in the pre-nuclear loess samples was measured, which provided a useful data for establishing a dating tool using ^129I; determination of ^129I in some environmental samples surrounding a nuclear power plant in China showed a similar ^129I concentration as the fallout background level, indicating its safety status in the surrounding environment of the nuclear power plant ; a series methods for separation and preparation of iodine from various samples,i, e. water, soil and plants for measurement of ^129I by AMS were established in our lab, in particularly, a ＂carrier free iodine＂ method for separation of iodine from low iodine samples and AMS measurement of ^129I was newly developed, in order to solve the problem on preparation and measurement of ultra-low level ^129I in low iodine concentration samples. Moreover, the test-check of ^129I has been carried out in iodine reagents and iodized salt, the results show that the reagents reflect different ^129I/^127I values which indicate different sources of iodine in these samples,the low ^129I in the iodine reagents is important as a quality control before the reagents were chosen for the lab work. The above work indicates that ^129I is not only an effective tool for environmental tracing, but also with a potential in geological dating
出处
《第四纪研究》
CAS
CSCD
北大核心
2012年第3期373-381,共9页
Quaternary Sciences
基金
科技部创新方法工作专项项目(批准号:2010IM031200)
中国科学院重要方向性项目(批准号:KZCX2-YW-BR-13,KZCX2-YW-147和KZCX2-YW-JS106)
国家自然科学基金委项目(批准号:41040016和41023006)
中国科学院创新团队国际伙伴计划(批准号:KZZD-EWTZ-03)共同资助
关键词
^129加速器质谱核环境安全
黄土
环境和地质应用
^129
accelerator mass spectrometry
nuclear environmental safety
loess
application in environmental and geological studies
