Highly Sensitive Differential Pulse Voltammetric Determination of Cd, Zn and Pb Ions in Water Samples Using Stable Carbon-Based Mercury Thin-Film Electrode
by Ensafi, A. A.; Nazari, Z.; Fritsch, I.
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.
- Journal
- Electroanalysis
- Volume
- 22
- Issue
- 21
- Year
- 2010
- Start Page
- 2551-2557
- URL
- https://dx.doi.org/10.1002/elan.201000246
- ISBN/ISSN
- 1521-4109; 1040-0397
- DOI
- 10.1002/elan.201000246