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Determination of 210Po in marine organism by pressure tank digestion and alpha spectrometry

Year: 2025
Type: article
Abstract: Background210Po in seafood is the main source of the total internal irradiation dose received by the population, and it is particularly important to accurately determine the activity concentration of 210Po in marine organisms.PurposeThis study aims to develop a method for the determination of 210Po in marine organism by pressure tank digestion and alpha spectrometry.MethodsFirstly marine organism samples, with the addition of a 209Po yield tracer, were digested by pressure tank method. 210Po was then spontaneously plated onto nickel disk in hydrochloric acid system and measured with alpha spectrometer. Thereafter, the experimental conditions were optimized for both digestion (acid selection, acid dosage, temperature, duration) and auto-deposition (temperature, time, hydrochloric acid (HCl) concentration, solution volume, types of metallic discs). Finally, aforementionted method was validated by the analysis of a certified reference material IAEA-414.ResultsWith the optimized conditions, the measurement results of 210Po in fish sample IAEA-414 fall within the confidence interval of 1.55~2.60 Bq·kg-1. The relative standard deviation is 9.0%. The recovery rates of 209Po tracer for reference samples vary from 92.9% to 98.6%. The detection limit of the method is 0.18 Bq·kg-1.ConclusionsValidation results demonstrate that the method proposed in this study is simple, rapid and accurate, and can be applied to measurement of 210Po in marine organism.
DOI: 10.3724/j.0253-3219.2025.hjs.48.250062
Authors: Jing LIN, Jialin NI, Jianda JI, Jinzhao ZHANG
Language: English
Open Access status: diamond
OpenAlex ID: W7104040825
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