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Report No.
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Development of microscale separation technique for uranium

Ouchi, Kazuki  ; Muto, Yuki*; Brandt, A.*; Nabatame, Nozomi*; Tsukahara, Takehiko*; Kitatsuji, Yoshihiro  

The adsorption and elution performance of uranium with the microchip column (length 11 mm, column volume 0.39 $$mu$$L) loaded an anion exchange resin for faster and safer radioactive waste analysis were investigated. When a mixed sample of lanthanides and uranium was flown on the microchip column at the feed rate of 1 ml h$$^{-1}$$, uranium could be selectively adsorbed and eluted in about 4 minutes of operation time. This was faster than a conventional column which took several tens of minutes. When this column was applied to uranium separation of the standard seawater, the uranium concentration was determined to be 2.86$$pm$$0.05 ppb, which was in good agreement with the certified value (2.81$$pm$$0.16 ppb). Therefore, the verification test was successful.

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