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

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-16 μM. 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. [ABSTRACT FROM AUTHOR]