期刊
ANALYTICAL BIOCHEMISTRY
卷 401, 期 1, 页码 47-52出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2010.02.014
关键词
DNAzyme; Gold nanoparticles; Copper; Lead; Fluorescence anisotropy
资金
- National Science Foundation (NSF) [20627005, 20776039]
- SKLBE [2060204]
- Shanghai Project [09JC1404100]
- NCET-07-0287
- Shuguang [06SG32]
Gold nanoparticles can be exploited to facilitate a highly sensitive and selective metal ion detection based on fluorescence anisotropy assay with metal ion-dependent DNA-cleaving DNAzyme. This assay allows rapid and accurate determination of metal ions in aqueous medium at room temperature. The method has been demonstrated for determination of Cu2+ and Pb2+ ions. The detection sensitivity can be significantly improved to 1 nM by using a nanoparticle enhancement approach. Moreover, the assay was also tested in 384-well plates for high-throughput routine determination of toxic metal ions in environmental samples. The method showed distinct advantages over conventional methods in terms of its potential sensitivity, specificity, and ability for rapid response. (C) 2010 Elsevier Inc. All rights reserved.
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