Premium
Determination of Manganese by Cathodic Stripping Voltammetry on a Microfabricated Platinum Thin–film Electrode
Author(s) -
Kang Wenjing,
Rusinek Cory,
Bange Adam,
Haynes Erin,
Heineman William R.,
Papautsky Ian
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201600679
Subject(s) - cathodic stripping voltammetry , detection limit , manganese , inductively coupled plasma mass spectrometry , analytical chemistry (journal) , anodic stripping voltammetry , electrode , working electrode , platinum , cathodic protection , stripping (fiber) , materials science , voltammetry , inductively coupled plasma , chemistry , electrochemistry , mass spectrometry , chromatography , metallurgy , plasma , catalysis , biochemistry , physics , composite material , quantum mechanics
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.