Fe3O4/graphene magnetic nanoparticles were synthesized and used as adsorbents for the dispersive solid-phase extraction of copper and lead in Panax notoginseng. The properties of the nanocomposites were characterized by Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD). The effects of parameters like the adsorbent amount, pH, adsorption time, mutual ion interferences, desorption solution and reusability of the adsorbent for the recovery of trace elements were examined. Copper and lead were then quantified using a flame atomic absorption spectrophotometer. Under the optimized conditions, the detection limits for copper and lead were 0.22 and 0.87 μg L−1, respectively. Repeatability (within 1 day) and reproducibility (between days) of the method were less than 2.2 and 4.8 %, respectively. The proposed method was applied for determination of Cu and Pb in Panax Notoginseng and satisfactory relative recoveries (96.4–102.0 %) were achieved.
Research on Chemical Intermediates – Springer Journals
Published: Nov 13, 2015
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