1. Repeatability and reproducibility of measurements of low dissolved radiocesium concentrations in freshwater using different pre-concentration methods
- Author
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SAKAGUCHI, Aya, ONDA, Yuichi, 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, Tagomori, Hisaya, Taniguchi, Keisuke, Tomita, Masatoshi, Tsukada, Hirofumi, Hayashi, Seiji, Lee, Sangyoon, Miyazu, Susumu, Shin, Moono, Nakanishi, Takahiro, Nishikiori, Tatsuhiro, Shinano, Takuro, and Tsuji, Hideki
- 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.
- Published
- 2019