著者

ZHANG Hao GUAN Yanan LI Xiaoshuang LIAN Lili WANG Xiyue GAO Wenxiu ZHU Bo LIU Xuying LOU Dawei

出版者

社団法人 日本分析化学会

雑誌

Analytical Sciences (ISSN:09106340)

巻号頁・発行日

vol.34, no.10, pp.1155-1161, 2018

被引用文献数

13

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<p>This paper describes a novel method for label-free mercury(II) ion detection based on exonuclease III-induced target signal recycling amplification using double-stranded DNA templated copper nanoclusters. The synthesized DNA-Cu nanoclusters were used with exonuclease III loop amplification technology for ultra-high sensitivity detection of mercury(II) ions, which were detected by significantly decreased fluorescence intensity. Under the optimal experimental conditions, there was a clear linear relationship between Hg²⁺ concentration in the range of 0.04 to 8 nM and fluorescence intensity. The detection limit for Hg²⁺ was 4 pM. In addition, the interference of other metal ions on the mercury(II) ion detection was also studied. To confirm the application of the fluorescent sensor, it was applied to determine the concentrations of mercury(II) ions in tap water, and the results showed that the method can be used to detect mercury(II) ions in water samples successfully.</p>