Abstract
Reversed phase liquid chromatography using UV detection was developed for the simultaneous analysis of Hg(II), Pb(II), Cd(II), Ni(II), Fe(III) and V(V) ions after their complexation with pyrrolidine-dithiocarbamate (PDC). Optimum chromatographic conditions were a μ-Bondapak C18 column and an isocratic mobile phase consisting of 40 mmol L−1 SDS, 34 mmol L−1 TBABr and 68% acetonitrile in 10 mmol L−1 phosphate buffer pH 3.5. The separation of six PDC complexes was achieved within 8 min. Analytical performances and method validation were investigated. The detection limits ranged from 0.16 μg L−1(Fe(III)) to 5.40 μg L−1(Pb(II)). Recoveries obtained for all the studied samples including tap water, whole blood and vegetables were 72–98%. The results obtained from the proposed method were not significantly different compared to those obtained from atomic absorption spectrometry (P = 0.05).
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Acknowledgements
The authors are grateful for financial support from the Center of Excellence for Innovation in Chemistry (PERCH-CIC) and for the helpful discussion from Prof. Richard L. Deming (Department of Chemistry and Biochemistry, California State University, Fullerton, CA).
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Butwong, N., Burakham, R. & Srijaranai, S. Use of Surfactant as Mobile Phase Additive in LC for Simultaneous Determination of Metal-Pyrrolidine Dithiocarbamate Chelates. Chroma 71, 639–645 (2010). https://doi.org/10.1365/s10337-010-1509-x
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DOI: https://doi.org/10.1365/s10337-010-1509-x