Journal
MICROCHIMICA ACTA
Volume 173, Issue 3-4, Pages 361-367Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-011-0565-8
Keywords
Carbon nanotubes; Separation and preconcentration; Palladium
Categories
Funding
- Program for New Century Excellent Talents in University [NCET-10-0341]
- Fundamental Research Funds for the Central Universities [10ZG01]
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A solid phase extraction procedure is presented for the separation and preconcentraton of trace levels of Pd(II) ion by using oxidized multiwalled carbon nanotubes (MWCNTs). Experimental parameters (pH, type of eluent, sample volume and flow rate of sample solutions) were studied in detail. The Pd(II) adsorbed on the MWCNTs was eluted with 3.0 M nitric acid and then determined by flame atomic absorption spectrometry. The effects of potentially interfering ions on the recovery of Pd(II) were also examined. Under optimized conditions, the method provides a preconcentration factor of 165, has a linear range from 1.0 ng mL(-1) to 200 ng mL(-1) of Pd(II), a detection limit of 0.3 ng mL(-1), and a relative standard deviation 5.3% at 50 ng mL(-1) of Pd(II). The method was validated by the extraction and determination of Pd(II) in water, fly ash, and road dust samples.
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