Determination of 210Pb and 212Pb in water and their radiological impact to the public via drinking water

LOW ENERGY ACCELERATOR AND RADIATION APPLICATIONS

Determination of ²¹⁰Pb and ²¹²Pb in water and their radiological impact to the public via drinking water

JIA Guogang，

TORRI Giancarlo

Nuclear Science and Techniques

Vol.23, No.1

pp.19-28

Published in print 20 Feb 2012

DOI：10.13538/j.1001-8042/nst.23.19-28

45300

A sensitive and accurate method for determining ultra low-level ²¹⁰Pb and ²¹²Pb in water samples through double measurements was developed. Pb was pre-concentrated as hydroxides, separated from alkaline earth elements as PbS precipitate, purified by an anion exchange resin chromatography column, precipitated as PbSO₄ for source preparation and counted by a low background β-counter. The procedure was checked with IAEA reference materials, and the results agreed well with the recommended values. The minimum detectable activity was 0.062 mBq·L^–1 for ²¹⁰Pb and 0.053 mBq·L^–1 for ²¹²Pb with a 48 L water sample. Seventeen drinking water samples were analyzed, with a Pb recovery of 88.8±5.5%, and the typical activity concentrations were 0.191−15.1 mBq·L^–1 for ²¹⁰Pb and of 1.12−5.77 mBq·L^–1 for ²¹²Pb. The estimated committed effective doses to adult members of the public in Italy due to intake of ²¹⁰Pb and ²¹²Pb in drinking water were 0.096−7.59 μSv·a^–1 and 0.005−0.025 μSv·a^–1, respectively.

210Pb212PbDose evaluationDrinking water

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