RADIATION PROTECTION ›› 2025, Vol. 45 ›› Issue (2): 133-140.

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Measurement of ultra-trace level 239Pu in seawater samples by accelerator mass spectrometry

WU Mengmeng, YIN Yunyun, GUO Luzhen, LV Tianlin, WANG Chuangao, PANG Hongchao   

  1. China Institute of Atomic Energy, Beijing 102413
  • Received:2024-03-05 Online:2025-03-20 Published:2025-03-18

Abstract: 239Pu in seawater was measured by accelerator mass spectrometry (AMS) system independently developed by China Institute of Atomic Energy. The 239Pu in seawater samples was separated and purified by anion resin, and the target samples were prepared by ferric hydroxide co-precipitation method. A set of tap water samples was prepared as blank samples to evaluate the measurement method with a detection limit of 0.9 fg (2.0 μBq). By this method, 239Pu in seawater samples was measured and analyzed. And the uncertainty of the measurement method was analyzed.

Key words: accelerator mass spectrometry, seawater, radioactivity measurement, 239Pu

CLC Number: 

  • X837