Abstract.
Citric acid was thermochemically esterified onto defatted cotton fibre to produce a carboxyl cotton chelator (CCC), which had been used for extraction of copper prior to its determination by flame atomic absorption spectrometry. The extraction of copper has been studied under both batch and column methods. Quantitative extraction of copper was achieved in the pH range 4–7. The time needed to extract each sample was less than 30 min by the batch method. The copper extraction capacity of CCC was found to be 22.7 mg g−1 at optimal pH value. The elution was quantitative with 1 mol L−1 hydrochloric acid. The feasible flow rate of copper-containing solution for quantitative extraction onto the column packed with CCC was 0.5–4.0 mL min−1, whereas for elution it was less than 1.5 mL min−1. A 100-fold extraction factor could be achieved under the optimal column conditions. The tolerance limits for common metal ions on the extraction of copper and the time of column reuse were investigated. The proposed method has been successfully applied for extraction and determination of copper in industrial wastewater and natural water samples.
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Gong, R., Hu, Y., Chen, J. et al. A cellulose-based carboxyl cotton chelator having citric acid as an anchored ligand: preparation and application as solid phase extractant for copper determination by flame atomic absorption spectrometry. Microchim Acta 158, 315–320 (2007). https://doi.org/10.1007/s00604-006-0722-7
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DOI: https://doi.org/10.1007/s00604-006-0722-7