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Chemical Papers

, Volume 72, Issue 11, pp 2707–2717 | Cite as

Synthesis, characterization and using a new terpyridine moiety-based ion-imprinted polymer nanoparticle: sub-nanomolar detection of Pb(II) in biological and water samples

  • Mojtaba ShamsipurEmail author
  • Leila Samandari
  • Abbas Besharati-Seidani
  • Afshin Pashabadi
Original Paper

Abstract

A highly selective lead-imprinted polymer was synthesized via a thermal precipitation polymerization technique based on a terpyridine-based ligand as the complexing agent. The synthesized polymer was successfully incorporated in a graphite paste electrode (GPE) as the recognition element for lead ion (Pb2+). Differential pulse anodic stripping voltammetry (DPASV) technique was used to transduce the binding events at the modified electrode. The imprinted polymer nanoparticles (IP-NPs) were synthesized by precipitation polymerization of ethylene glycol dimethacrylate as the cross-linker, 2,2′-azobisisobutyronitrile as the free radical initiator and 2,2′:6′,6″-terpyridine (terpy) as the recognition element. The sensing procedure is based on the accumulation of lead ions at − 1.0 V vs. Ag/AgCl. Afterward, the DPV was recorded by the sweeping potential in a positive direction to oxidize the accumulated ions, leading to the appearance of a significant anodic peak. The constructed IIP–GPE revealed a linear response toward Pb2+ over the concentration range from 0.4 to 10 nM (with the sensitivity of 693.95 nA nM−1 cm−2) and 10 nM to 1.0 µM (with the sensitivity of 580.25 µA µM−1 cm−2). The limit of detection (LOD) was evaluated to be 0.11 nM (for S/N = 3). The accuracy of the sensor was explored by analysis of a quality control material (QCMs, Seronorm™ urine REF NO 1011645) and different water samples. Selectivity studies showed no particular interference for detection of Pb(II).

Keywords

Terpyridine Ion-imprinted polymer Graphite paste electrode Stripping voltammetry Lead ions 

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2018

Authors and Affiliations

  • Mojtaba Shamsipur
    • 1
    Email author
  • Leila Samandari
    • 1
  • Abbas Besharati-Seidani
    • 2
  • Afshin Pashabadi
    • 1
  1. 1.Department of ChemistryRazi UniversityKermanshahIran
  2. 2.Department of ChemistryMalek-Ashtar University of TechnologyTehranIran

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