@misc{oai:repo.qst.go.jp:00071382,
 author = {Yang, Guosheng and Zheng, Jian and Tagami, Keiko and Uchida, Shigeo and 楊 国勝 and 鄭 建 and 田上 恵子 and 内田 滋夫},
 month = {Nov},
 note = {Radium-226 is one of the important radionuclides for dose assessment of radioactive waste disposal, particularly, for uranium waste. For this uranium waste, shallow land disposal will be considered and it is necessary to carry out environmental monitoring around the site, for example, well water (and ground water) monitoring. Since Ra-226 is a progeny of U-238, continuous monitoring of its concentration in water samples is of great importance. It is difficult, however, to detect low concentration of Ra-226 in water samples. Therefore, preconcentration of Ra in water samples is necessary. Recently, application of sector field inductively coupled plasma mass spectrometry (SF-ICP-MS) for determination of long-lived radionuclides present at ultraltrace level in the environment is considered as one of the popular and reliable methods; this method has several advantages, i.e., smaller sample size, higher precision, and time saving compared to those of the conventional radiometric methods. However, in order to measure ultratrace-levels of Ra-226 by SF-ICP-MS, some separation steps for Ra from alkaline and alkaline earth element in the sample matrix is needed. Furthermore, the removal of any potential sources of interference (molecular ions and isobaric interferences) that may result in incorrect results is of crucial importance, especially the polyatomic interference 88Sr138Ba+ because of the relatively high concentrations of Sr and Ba in water samples. Due to their similar chemical property, the separation of Ba-Ra is difficult; the effective removal of Sr from Ba (Ra) is more practical for 226Ra determination by SF-ICP-MS. In this study, several ion-exchange chromatographic separation methods were compared and the most suitable condition for Sr separation from Ba (Ra) in simulated river water will be reported.
\nThis work has been supported by the Agency for Natural Resources and Energy, the Ministry of Economy, Trade and Industry (METI), Japan., International Symposium on Nuclear Back-end Issues and the Role of Nuclear Transmutation Technology after the accident of TEPCO’s Fukushima Daiichi Nuclear Power Stations},
 title = {A simple and rapid method for separation and preconcentration of Ra in water samples},
 year = {2013}
}