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Peptide-Mediated Nanopore Detection of Uranyl Ions in Aqueous Media.


ABSTRACT: Uranium is one of the most common radioactive contaminants in the environment. As a major nuclear material in production, environmental samples (like soil and groundwater) can provide signatures on uranium production activity inside the facility. Thus, developing a new and portable analytical technology for uranium in aqueous media is significant not only for environmental monitoring, but also for nonproliferation. In this work, a label-free method for the detection of uranyl (UO22+) ions is developed by monitoring the translocation of a peptide probe in a nanopore. Based on the difference in the number of peptide events in the absence and presence of uranyl ions, nanomolar concentration of UO22+ ions could be detected in minutes. The method is highly selective; micromolar concentrations of Cd2+, Cu2+, Zn2+, Ni2+, Pb2+, Hg2+, Th4+, Mg2+, and Ca2+ would not interfere with the detection of UO22+ ions. In addition, simulated water samples were successfully analyzed.

SUBMITTER: Roozbahani GM 

PROVIDER: S-EPMC5450019 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Peptide-Mediated Nanopore Detection of Uranyl Ions in Aqueous Media.

Roozbahani Golbarg M GM   Chen Xiaohan X   Zhang Youwen Y   Xie Ruiqi R   Ma Rui R   Li Dien D   Li Huazhong H   Guan Xiyun X  

ACS sensors 20170504 5


Uranium is one of the most common radioactive contaminants in the environment. As a major nuclear material in production, environmental samples (like soil and groundwater) can provide signatures on uranium production activity inside the facility. Thus, developing a new and portable analytical technology for uranium in aqueous media is significant not only for environmental monitoring, but also for nonproliferation. In this work, a label-free method for the detection of uranyl (UO<sub>2</sub><sup  ...[more]

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