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<p>A radiochemical method has been developed for the simultaneous isolation and sequential determination of <sup>226</sup>Ra and <sup>228</sup>Ra in water samples. The procedure involves coprecipitation with Pb(Ba)SO<sub>4</sub>, microprecipitation and sequential analysis using alpha- and gamma-spectrometry, avoiding lengthy ingrowth periods and offering a faster and more cost-effective alternative. Optimal conditions for 0.5 L of sample (200&#xa0;mg of Pb<sup>2+</sup>, 500&#xa0;µg of Ba<sup>2+</sup>, 10&#xa0;mL of EDTA) were established through ANOVA. Method verification with spiked samples and IAEA reference water samples demonstrated high precision and accuracy. The method complies with Spanish regulatory requirements and is suitable for routine monitoring and emergency applications.</p>

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Streamlined approach for radium isotopes quantification in water samples by α and γ-spectrometry

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月27日

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  • M. Gongora,
  • J. Martínez,
  • A. Peñalver,
  • C. Aguilar,
  • F. Borrull

摘要

A radiochemical method has been developed for the simultaneous isolation and sequential determination of 226Ra and 228Ra in water samples. The procedure involves coprecipitation with Pb(Ba)SO4, microprecipitation and sequential analysis using alpha- and gamma-spectrometry, avoiding lengthy ingrowth periods and offering a faster and more cost-effective alternative. Optimal conditions for 0.5 L of sample (200 mg of Pb2+, 500 µg of Ba2+, 10 mL of EDTA) were established through ANOVA. Method verification with spiked samples and IAEA reference water samples demonstrated high precision and accuracy. The method complies with Spanish regulatory requirements and is suitable for routine monitoring and emergency applications.