학술논문
Repeatability and reproducibility of measurements of low dissolved radiocesium concentrations in freshwater using different pre-concentration methods.
Document Type
Article
Author
Kurihara, Momo; Yasutaka, Tetsuo; Aono, Tatsuo; Ashikawa, Nobuo; Ebina, Hiroyuki; Iijima, Takeshi; Ishimaru, Kei; Kanai, Ramon; Karube, Zin'ichi; Konnai, Yae; Kubota, Tomijiro; Maehara, Yuji; Maeyama, Takeshi; Okizawa, Yusuke; Ota, Hiroaki; Otosaka, Shigeyoshi; Sakaguchi, Aya; Tagomori, Hisaya; Taniguchi, Keisuke; Tomita, Masatoshi
Source
Subject
*STATISTICAL reliability
*SOLID phase extraction
*CESIUM
*STANDARD deviations
*CESIUM ions
*FRESH water
*STATISTICAL accuracy
*MEASUREMENT
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Language
ISSN
0236-5731
Abstract
We assessed the repeatability and reproducibility of methods for determining low dissolved radiocesium concentrations in freshwater in Fukushima. Twenty-one laboratories pre-concentrated three of 10 L samples by five different pre-concentration methods (Prussian-blue-impregnated filter cartridges, coprecipitation with ammonium phosphomolybdate, evaporation, solid-phase extraction disks, and ion-exchange resin columns), and activity of radiocesium was measured. The z-scores for all of the 137Cs results were within ± 2, indicating that the methods were a good degree of precision. The relative standard deviations (RSDs) indicating the reproducibility among different laboratories were larger than the RSDs indicating the repeatability in each separate laboratory. [ABSTRACT FROM AUTHOR]