Electrochemical sensing using magnetic molecularly imprinted polymer particles previously captured by a magneto-sensor

Gerson A. Ruiz-Córdova, Sabir Khan, Luís Moreira Gonçalves, Maria Isabel Pividori, Gino Picasso, Maria Del Pilar T. Sotomayor

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

© 2017 Elsevier B.V. The determination of 1-chloro-2,4-dinitrobenzene (CDNB) was used as a proof-of-concept to a simple analytical practical configuration applying magnetic molecularly imprinted particles (mag-MIPs). Mag-MIPs were captured from an emulsion by a home-made magneto-sensor (where a small magnet was entrapped by a graphite-epoxy composite) and then, this sensor, was transferred to the solution containing the analyte, where, after binding to the mag-MIPs, the analyte was directly analysed using differential pulse voltammetry (DPV) since the magneto-sensor acted as the working electrode. After optimization, a detection limit of 6.0 μmol L−1 with a RSD of 2.7% was achieved along with suitable recoveries and selectivity. This methodology offers a different approach for electroanalytical methodologies using mag-MIPs.
Original languageEnglish
Pages (from-to)19-23
JournalTalanta
Volume181
DOIs
Publication statusPublished - 1 May 2018

Keywords

  • 2,4-Dinitrochlorobenzene (CDNB)
  • Electroanalysis
  • Magnetic beads
  • Modified working electrode
  • Nanoparticles
  • Stripping voltammetry

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