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- Title
Double Preconcentration of Trace Amounts of Cadmium in Nail Samples and Measurement by Differential Pulse Voltammetry.
- Authors
Shahi, Somayeh; Nateghi, Mohammad
- Abstract
Cadion was coated on carbon powder and used as a solid phase for selective extraction and preconcentration of cadmium ions. Complexed cadmium ions were eluted from solid phase by 5 mL, nitric acid (2.0 M) with the flow rate of 2 mL min.The resulted solution was used for accumulation of the cadmium metal at the surface of the carbon paste electrode at −1.3 V reduction potential. Finally, cadmium was reoxidized and the differential pulse voltammogram recorded at the potential range of −0.55 to −0.2 V. Calibration graph was plotted in the concentration range of 0.5-50 μg L of cadmium. Detection limit 0.06 μg L was calculated based on the 3 S/m. The RSD was 9.13 % (n = 4) for cadmium concentration of 10 μg L with preconcentration factor of 100. Method was successfully used for the determination of cadmium in finger nail samples and after spiking the samples, the recoveries were evaluated >96 %.
- Subjects
CADMIUM; VOLTAMMETRY; SOLID phase extraction; NITRIC acid; CADMIUM metallurgy; INDUCTIVELY coupled plasma atomic emission spectrometry
- Publication
Bulletin of Environmental Contamination & Toxicology, 2015, Vol 94, Issue 4, p468
- ISSN
0007-4861
- Publication type
Article
- DOI
10.1007/s00128-015-1484-x