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Report No.

Application of diethylamino-group-containing porous-polymeric-disk-packed cartridge to separation of U in urine sample

Asai, Shiho; Kimura, Takaumi ; Miyoshi, Kazuyoshi*; Saito, Kyoichi*; Yamada, Shinsuke*; Hirota, Hideyuki*

Estimation of internal radiation exposure using urine is helpful for screening the level of radiation exposure. Inductively coupled plasma mass spectrometry has been widely employed for the determination of radionuclides in urine. Prior to the measurements, mineral components in urine sample are removed to alleviate the instrumental damage. In this study, diethylamino-group containing porous-disk-packed cartridge (DEA cartridge) was applied to the separation of U in urine. The DEA cartridge was prepared by graft-polymerization and the subsequent introduction of a diethylamino group. U in urine was adsorbed onto the DEA cartridge and quantitatively eluted by permeating 5 mL of dilute nitric acid. The concentration of the U in the urine was agreed well with the mean concentration for unexposed Japanese individuals. The time required to accomplish the procedure was 20 minutes. A simple and rapid removal of the mineral component with high concentration was demonstrated.



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