Journal
JOURNAL OF SEPARATION SCIENCE
Volume 39, Issue 9, Pages 1684-1690Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201501283
Keywords
Chlorophenols; Environmental water; Graphene; High performance liquid chromatography; Magnetic solid-phase extraction
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Funding
- Science and Technology support program of Jiangxi province, China [20151BBE50022]
- Natural Science Foundation of Jiangxi province, China [20142BAB203012]
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In this work, polydopamine-coated magnetic graphene nanocomposites were synthesized by a simple solvothermal reaction and self-polymerization of dopamine, and the as-made nanocomposites were successfully applied as an effective adsorbent for the preconcentration of the four chlorophenols in environmental water samples before high-performance liquid chromatography. The polydopamine-coated magnetic graphene nanocomposites have several advantages such as a high surface area, fast separation ability, super-hydrophilicity, and high peak intensities for aromatic analytes. Various parameters, including eluting solvent and volume, the amounts of absorbents, extraction time and elution time were optimized. Validation experiments showed that the optimized method had good linearity (r(2) > 0.9990), satisfactory precision (RSD < 6.7%) and high recovery (90-105%). The limits of detection were 0.013-0.020 mu g/L and the limits of quantification ranged from 0.043 to 0.070 mu g/L. The results indicated that the proposed method had advantages of convenience, good sensitivity, and high efficiency. The method has been applied successfully to analyze chlorophenols in real water samples.
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