application of graphene oxide- magnetic nanoparticle for solid phase extraction of trace amounts of cadmium ions in environmental samples

abstract in this work, fe3o4-graphene oxide nanocomposite (go-fe3o4) 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-fe3o4 was characterized by scanning electron microscopy (sem) and x-ray powder diffraction (xrd). various parameters affecting go-fe3o4 mspe of cadmium have been investigated. under the optimized experimental conditions, the limit of detection (lod) for cd2+ in the range of 1-50 ngl-1 were 0.21 and the relative standard deviation (rsds, c=50 ngl-1, n=7) were 3.2 %. the developed go-fe3o4 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.