Solid-phase extraction method for preconcentration of cadmium and lead in environmental samples using multiwalled carbon nanotubes
A new sensitive and accurate solid-phase extraction
method for preconcentration of trace amounts of cadmium and lead in various
environmental samples prior to flame atomic absorption spectrometry
determination has been developed. The proposed method is based on the
utilization of multiwalled carbon nanotubes in combination with
5-benzyl-4-[-chlororbenzylidene amine]-4H-1,2,4-triazole-3-thiol (BCBATT) as
a solid-phase sorbent with the aid of ultrasonication. The effect of the
preconcentration parameters was investigated. Good recoveries ranging from
95% to 102% with relative standard deviations of 3.2% and 2.8%
for Cd2+2+^{2+} and Pb2+2+^{2+}, respectively, were obtained, indicating high
accuracy and precision. The limits of detection were 0.2 and 0.5 μμ\mu g/L
for Cd2+2+^{2+} and Pb2+2+^{2+}, respectively. The preconcentration factor was
100. The validation of the proposed preconcentration procedure was performed
using certified reference materials with satisfactory and compatible
results. The proposed method was applied to various real environmental
samples for determination of Cd2+2+^{2+} and Pb2+2+^{2+} concentrations and
satisfactory results were obtained.
Keywords:
Solid-phase extraction, multiwalled carbon nanotubes, cadmium lead, food and water samples,
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- ISSN: 1300-0527
- Yayın Aralığı: Yılda 6 Sayı
- Yayıncı: TÜBİTAK
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