Sensitive electrochemical sensor using a graphene-polyaniline nanocomposite for simultaneous detection of Zn(II), Cd(II), and Pb(II)

Details

• Personal Author:
  Cate DM ; Chailapakul O ; Henry CS ; Rodthongkum N ; Ruecha N ; Volckens J
• Description:
  This work describes the development of an electrochemical sensor for simultaneous detection of Zn(II), Cd(II), and Pb(II) using a graphene-polyaniline (G/PANI) nanocomposite electrode prepared by reverse-phase polymerization in the presence of polyvinylpyrrolidone (PVP). Two substrate materials (plastic film and filter paper) and two nanocomposite deposition methods (drop-casting and electrospraying) were investigated. Square-wave anodic stripping voltammetry currents were higher for plastic vs. paper substrates. Performance of the G/PANI nanocomposites was characterized by scanning electron microscopy (SEM) and cyclic voltammetry. The G/PANI-modified electrode exhibited high electrochemical conductivity, producing a three-fold increase in anodic peak current (vs. the unmodified electrode). The G/PANI-modified electrode also showed evidence of increased surface area under SEM. Square-wave anodic stripping voltammetry was used to measure Zn(II), Cd(II), and Pb(II) in the presence of Bi(III). A linear working range of 1-300 µg L(-1) was established between anodic current and metal ion concentration with detection limits (S/N=3) of 1.0 µg L(-1) for Zn(II), and 0.1 µg L(-1) for both Cd(II) and Pb(II). The G/PANI-modified electrode allowed selective determination of the target metals in the presence of common metal interferences including Mn(II), Cu(II), Fe(III), Fe(II), Co(III), and Ni(II). Repeat assays on the same device demonstrated good reproducibility (%RSD<11) over 10 serial runs. Finally, this system was utilized for determining Zn(II), Cd(II), and Pb(II) in human serum using the standard addition method. [Description provided by NIOSH]
• Subjects:
  Aniline Compounds Cadmium Chemistry Lead Occupational Health Safety Zinc Compounds
• Keywords:
  Anilines Author Keywords: Diagnostic Cadmium-compounds Chemical-composition Chemical-properties Electrochemical-analysis Electrochemical-properties Electrochemical-reactions Equipment-design Exposure Heavy Metal Lead-compounds Nanotechnology Paper-based Devices Point-of-need Pollution Zinc-compounds

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• ISSN:
  0003-2670
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  40-48
• Volume:
  874
• NIOSHTIC Number:
  nn:20047275
• Citation:
  Anal Chim Acta 2015 May; 874:40-48
• Contact Point Address:
  Charles S. Henry, Colorado State University Department of Chemistry, 1872 Campus Delivery, Fort Collins, CO 80523
• Email:
  chuck.henry@colostate.edu
• CAS Registry Number:
  Aniline (CAS RN 62-53-3) ; Cadmium (CAS RN 7440-43-9) ; Graphite (CAS RN 7782-42-5) ; Lead (CAS RN 7439-92-1) ; Zinc (CAS RN 7440-66-6)
• Federal Fiscal Year:
  2015
• Performing Organization:
  Colorado State University - Fort Collins
• Peer Reviewed:
  True
• Start Date:
  20110701
• Source Full Name:
  Analytica Chimica Acta
• End Date:
  20130630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9ee68822a68db1762b05ad0386324182070df561f2ac0a4346a80bbf3040a58cebff821960e473991336a4c624bbab148d2bbd432231fd271389bdde788e78ff
• Download URL:
  https://stacks.cdc.gov/view/cdc/202410/cdc_202410_DS1.pdf
• File Type:
  [PDF - 2.50 MB ]