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National comparison of methods for determination of radon in water

Mazur Jadwiga, Kozak Krzysztof, Grządziel Dominik, Guguła Szymon, Mroczek Mariusz, Kozłowska Beata, Walencik-Łata Agata, Podgórska Zuzanna, Wołoszczuk Katarzyna, Przylibski Tadeusz A., Kowalska Agata, Domin Elżbieta, Wysocka Małgorzata, Chałupnik Stanisław, Chmielewska Izabela, Długosz-Lisiecka Magdalena, Szajerski Piotr, Chau Nguyen Dinh, Krakowska Paulina, Pliszczyński Tomasz, Ośko Jakub, Dymecka Małgorzata, Mazurek Daria

Nukleonika

2020

Vol. 65, No. 2

77--81

The article describes three interlaboratory experiments concerning 222Rn determination in water samples. The first two experiments were carried out with the use of artificial radon waters prepared by the Laboratory of Radiometric Expertise (LER), Institute of Nuclear Physics, Polish Academy of Sciences in Kraków in 2014 and 2018. The third experiment was performed using natural environment waters collected in the vicinity of the former uranium mine in Kowary in 2016. Most of the institutions performing radon in water measurements in Poland were gathered in the Polish Radon Centre Network, and they participated in the experiments. The goal of these exercises was to evaluate different measurement techniques used routinely in Polish laboratories and the laboratories’ proficiency of radon in water measurements. In the experiment performed in 2018, the reference values of 222Rn concentration in water were calculated based on the method developed at LER. The participants’ results appeared to be worse for low radon concentration than for high radon concentrations. The conclusions drawn on that base indicated the weaknesses of the used methods and probably the sampling. The interlaboratory experiments, in term, can help to improve the participants’ skills and reliability of their results.

224Ra and the 224Ra/228Ra activity ratio in selected mineral waters from the Polish Carpathians

Nguyen C. D., Rajchel L., Van-Duong H., Nowak J.

Geological Quarterly

2017

Vol. 61, No. 4

771--778

Mineral and therapeutic waters widely occurring in the Polish Carpathians contain a vast amount of biogenic elements. However, radioactive elements like radium isotopes are also found in these waters. This paper presents the first results of the activity concentration measurements of 224Ra in selected mineral waters of the Polish Carpathians. Additionally, the content of 226Ra and 228Ra, and the activity ratios of 224Ra/228Ra, 224Ra/226Ra and 226Ra/228Ra in the waters were determined. The work was based on a method for the simultaneous determination of 224Ra, 226Ra and 228Ra in water samples using the a/b liquid scintillation spectrometer. The results show that the activity concentrations of 224Ra, 226Ra and 228Ra in the mineral waters are comparable and vary from ca. 220 mBq/L to above 1500 mBq/L. The activity ratios of 224Ra/228Ra, 224Ra/226Ra and 226Ra/228Ra are variable within the ranges of 0.68 to 1.48, 0.65 to 1.48, and 0.78 to 2.05, respectively. The committed effective dose resulting from the intake of 224Ra through the water consumption is far lower than that from 226Ra and 228Ra.