In Situ Preconcentration and Quantification of Cu²⁺ via Chelating Polymer-Wrapped Multiwalled Carbon Nanotubes.

ABSTRACT: Trace analysis of heavy metals in complex, environmentally relevant matrices remains a significant challenge for electrochemical sensors employing stripping voltammetry-based detection schemes. We present an alternative method capable of selectively preconcentrating Cu²⁺ ions at the electrode surface using chelating polymer-wrapped multiwalled carbon nanotubes (MWCNTs). An electrochemical sensor consisting of poly-4-vinyl pyridine (P4VP)-wrapped MWCNTs anchored to a poly(ethylene terephthalate) (PET)-modified gold electrode (r = 1.5 mm) was designed, produced, and evaluated. The P4VP is shown to form a strong association with Cu²⁺ ions, permitting preconcentration adjacent to the electrode surface for interrogation via cyclic voltammetry. The sensor exhibited a

SUBMITTER: Fernando PUAI 

PROVIDER: S-EPMC7931178 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature