Premium
Highly Sensitive Differential Pulse Voltammetric Determination of Cd, Zn and Pb Ions in Water Samples Using Stable Carbon‐Based Mercury Thin‐Film Electrode
Author(s) -
Ensafi Ali A.,
Nazari Zahra,
Fritsch Ingrid
Publication year - 2010
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.201000246
Subject(s) - anodic stripping voltammetry , mercury (programming language) , certified reference materials , detection limit , analytical chemistry (journal) , chemistry , differential pulse voltammetry , saturated calomel electrode , tap water , electrode , materials science , electrochemistry , working electrode , inorganic chemistry , cyclic voltammetry , environmental chemistry , chromatography , environmental engineering , computer science , programming language , engineering
Abstract A new carbon‐based mercury thin‐film electrode consisting of screen‐printed carbon on a low temperature co‐fired ceramic substrate was made. Ex‐situ mercury deposition in a potassium thiocyanate solution was used. This approach an electrode with high long‐term stability (>500 measurement cycles) and reproducibility (≤2 %) for sensitive determination of ultra trace heavy metals, using differential pulse anodic stripping voltammetry. The detection limits were 0.25, 0.08 and 5.5 ng mL −1 for Cd(II), Pb(II), and Zn(II), respectively. The method was applied to the determination of the analytes in water, wastewater, lake water, and certified reference material samples with satisfactory results.