LABEL-FREE DETECTION OF Pb2+ USING SPECIFIC DNAZYME AND UNMODIFIED Au NANOPARTICLE PROBE

Chengyong Li (), Zike Zhao (), Yaoqian Liu (), Lulu Lv (), Bing Qi (), Haixia Lin (), Lei He () and Shengli Sun
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Chengyong Li: College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Zike Zhao: #x2020;Monitoring Center of Ocean Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Yaoqian Liu: #x2020;Monitoring Center of Ocean Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Lulu Lv: #x2020;Monitoring Center of Ocean Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Bing Qi: #x2020;Monitoring Center of Ocean Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Haixia Lin: #x2020;Monitoring Center of Ocean Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Lei He: College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, P. R. China
Shengli Sun: #x2020;Monitoring Center of Ocean Resources and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China‡School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, P. R. China

Surface Review and Letters (SRL), 2018, vol. 25, issue 03, 1-6

Abstract: A simple and sensitive Pb2+ sensor is developed based on label-free 17E DNAzyme and unmodified Au nanoparticles. On this basis, Pb2+ concentration can be judged according to the color variation of Au nanoparticles. The detection limit is 100nM and linear range is 100nM–16μM. It can serve as a measurement tool for Pb2+ rapid detection, which provides reference for the development of sensors in environmental monitoring and food safety.

Keywords: Pb2+ sensor; DNAzyme; Au nanoparticles; color variation (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X18500737

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