학술논문
Determination of 227 Ac in water by alpha spectrometry after purification with titanium phosphate and DGA resin.
Document Type
Article
Author
Source
Subject
*TITANIUM
*SPECTROMETRY
*WATER sampling
*DETECTION limit
*WATER use
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Language
ISSN
0236-5731
Abstract
A new routine method to measure 227Ac in water samples was developed. Actinium-227 was separated from potential radioactive and matrix interferences using a DGA resin (Eichrom) at optimal extraction and elution conditions (2 M and 15.7 M HNO3, respectively). This was possible because Ac was pre-concentrated and separated from Ca using titanium phosphate co-precipitation at pH 3.5. Finally, 227Ac was counted by alpha spectrometry for 48 h after a cerium fluoride micro-precipitation. A minimal detection limit of 0.03 ± 0.01 Bq l−1 was obtained. The method was validated using spiked water samples. [ABSTRACT FROM AUTHOR]