用高纯锗γ谱仪和放射化学法分析环境样品中137Cs的对比研究

环境样品中¹³⁷Cs的分析方法主要有高纯锗γ能谱法和化学分离后进行β计数的放射化学法。本文对这两种方法的测定结果进行对比。结果表明,二者具有可比性,放射化学法探测限低,更灵敏;而高纯锗γ能谱法具有耗时短、回收率高的优点,这对于应急监测具有重要作用。

Comparasion on analytical results between gamma ray spectrometry and radiochemical method for 137Cs in environmental samples

Gamma ray spectroscopy method and radiochemical method were introduced to detect ¹³⁷Cs. The activity concentrations detected by using the two methods were analyzed through comparison. Then lower detection limit and higher sensitivity was shown in radiochemical method. Gamma ray spectrometry, with acceptable range of results, could be applied on detection of environmental samples. In addition, less time consumed and higher recovery could be achieved by the gamma ray spectrometry, which is important for emergency monitoring.