Label-Free and Sensitive Determination of Cadmium Ions Using a Ti-Modified Co3O4-Based Electrochemical Aptasensor.
作者： Yang Liu , Dongwei Zhang , Jina Ding , Kashif Hayat , Xijia Yang
DOI: 10.3390/BIOS10120195
关键词:
摘要: The current work demonstrates an electrochemical aptasensor for sensitive determination of Cd2+ based on the Ti-modified Co3O4 nanoparticles. In this unlabeled system, nanoparticles act as signal amplifiers modified screen-printed carbon electrode (SPCE) surface, while derivative aptamer works a target recognizer. addition, sensing is increase in probe thionine due to binding via specific recognition. study, key parameters, including concentration, pH, and incubation time were optimized, respectively, ensure performance. Cyclic voltammetry was used not only characterize each preparation optimization step, but also profile bindings Cd2+. Under optimal conditions, can be determined linear range 0.20 15 ng/mL, with detection limit 0.49 significantly below maximum concentration set by U.S. Environmental Protection Agency. Based comparative analysis results recovery test real samples, simple, label-free highly selective method has considerable potential thus in-situ environmental monitoring platform testing.
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