Application of Graphene Oxide- Magnetic Nanoparticle for Solid Phase Extraction of Trace Amounts of Cadmium Ions in Environmental Samples

In this work, Fe, 0 -graphene oxide nanocomposite (GO-Fe, 0,) was prepared as effective absorbent for magnetic solid phase extraction (MSPE) of trace quantities of cadmium ions in environmental water and rice samples using 1, 2-dihydroxy anthraquinone-3-sulphonic acid, sodium salt (Alizarin red S) and flame atomic absorption spectrometry (FAAS). The GO-Fe, 4 was characterized by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD). Various parameters affecting GO-Fe,0MSPE of cadmium have been investigated. Under the optimized experimental conditions, the limit of detection (LOD) for Cd2+ in the range of 1-50 ngL-' were 0.21 and the relative standard deviation (RSDs, c=50 ngL-', n=7) were 3.2%. The developed GO-Fe, 0, MSPE-FAAS method has the advantages of rapidity, simplicity, good sensitivity, and it is suitable for the analysis of trace cadmium in samples with complex matrix.