Determination of Manganese by Cathodic Stripping Voltammetry on a Microfabricated Platinum Thin–film Electrode

Wenjing Kang, Cory Rusinek, Adam Bange, Erin Haynes, William R. Heineman, Ian Papautsky

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

In this work, we report on the determination of trace manganese (Mn) using cathodic stripping voltammetry (CSV) using a microfabricated sensor with a Pt thin-film working electrode. While an essential trace metal for human health, prolonged exposure to Mn tends to gradually impair our neurological system. The potential sources of Mn exposure make it necessary to monitor the concentration in various sample matrices. Previous work by us and others suggested CSV as an effective method for measuring trace Mn. The analytical performance metrics were characterized and optimized, leading to a calculated limit of detection (LOD) of 16.3 nM (0.9 ppb) in pH 5.5, 0.2 M acetate buffer. Further, we successfully validated Mn determination in surface water with ∼90% accuracy and >97% precision as compared with inductively coupled plasma mass spectrometry (ICP-MS) “gold standard” measurement. Ultimately, with stable, accurate and precise electrochemical performance, this Pt sensor permits rapid monitoring of Mn in environmental samples, and could potentially be used for point-of-use measurements if coupled with portable instrumentation.

Original languageEnglish
Pages (from-to)686-695
Number of pages10
JournalElectroanalysis
Volume29
Issue number3
DOIs
StatePublished - Mar 1 2017

Bibliographical note

Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • Electrochemical sensor
  • Pt working electrode
  • cathodic stripping voltammetry
  • manganese determination

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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