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<p>Gross alpha and beta (GAB) measurements provide a rapid screening tool for assessing radionuclide contamination in water. This study aimed to establish a sensitive, simple method for low-level GAB detection using a liquid scintillation counter (LSC). Different sample preparation approaches (direct, co-precipitation with Fe(OH)<sub>3</sub>, Ca<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>, MnO<sub>2</sub>, and evaporation) were tested on four water samples containing natural and anthropogenic radionuclides from the IAEA 2022 proficiency test. Results, evaluated by recoveries and Zeta-scores, showed preparation methods influence recovery and quenching. Co-precipitation with Ca<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> and evaporation performed best, though GAB remains a complementary rather than absolute analytical method, as not all radionuclides can be detected simultaneously.</p>

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A comparative study of the gross alpha and beta sample preparation method with a liquid scintillation counter

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月25日

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  • Leja Rovan Stiplošek,
  • Sian Patterson

摘要

Gross alpha and beta (GAB) measurements provide a rapid screening tool for assessing radionuclide contamination in water. This study aimed to establish a sensitive, simple method for low-level GAB detection using a liquid scintillation counter (LSC). Different sample preparation approaches (direct, co-precipitation with Fe(OH)3, Ca3(PO4)2, MnO2, and evaporation) were tested on four water samples containing natural and anthropogenic radionuclides from the IAEA 2022 proficiency test. Results, evaluated by recoveries and Zeta-scores, showed preparation methods influence recovery and quenching. Co-precipitation with Ca3(PO4)2 and evaporation performed best, though GAB remains a complementary rather than absolute analytical method, as not all radionuclides can be detected simultaneously.