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

作　　者：TORRI Giancarlo 

机构地区：[1]National Institute of Environmental Protection and Research

出　　处：《Nuclear Science and Techniques》2012年第1期19-28,共10页核技术（英文）

摘　　要：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.Theminimum 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.Abstract 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 sourcepreparation and counted by a low background 13-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 aPb 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 μtSv-a^-1 and 0.005-0.025 μSv-a^-1, respectively.

关 键 词：中水 水测定 国际原子能机构 辐射 公众 离子交换树脂 沉淀分离 氢氧化物 

分 类 号：R123.1[医药卫生—环境卫生学]