环境和生物样品中^(14)C的分析方法初探

Analysis method of ^(14)C in environmental and biological samples

为了系统地了解环境和生物样品中碳⁃14(^(14)C)的测量方法,明确各种方法可能存在的优缺点,本文在比较国内测量方法的基础上,对^(14)C测量方法体系进行了深入的探索,讨论了基于不同体系样品预处理相关的沉淀法、鼓泡法、高温燃烧氧化法、湿法氧化法、氧化燃烧法和氧弹燃烧法等,基于样品制备相关的粉末悬浮法、直接吸收法、苯合成法和石墨法等,基于样品测量方法相关的液闪β放射性计数法和加速器质谱法等,系统地分析了不同方法存在的问题并提出解决方案,希冀能以此提高实验室技术人员对分析方法的理解,提高我国环境和生物样品中^(14)C测量水平.

In order to systematically understand the measurement methods of carbon⁃14(^(14)C)in environmental and biological samples,clarify the possible advantages and disadvantages of various methods.Based on the comparison of domestic measurement methods,this paper made an in⁃depth exploration of the^(14)C measurement method system,and systematically analyzed the precipitation method,bubbling method,high temperature combustion oxidation method,wet oxidation method,oxidative combustion method and oxygen bomb combustion method on sample pretreatment;powder suspension method,direct absorption method,benzene synthesis method and graphite method on sample preparation;liquid scintillation counting method and accelerator mass spectrometry on sample measurement methods,this paper analyzes the problems existing in different methods and proposes solutions,hoping to deepen the understanding of analytical methods for laboratory technicians and improve the^(14)C measurement level in environmental and biological samples in China.