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

محورهای موضوعی : Physical Chemistry & Electrochemistry

Hanieh Etezadi ¹ , Leila Baramakeh ²

1 - Department of Chemistry, Marvdasht branch, Islamic Azad University, Marvdasht, Iran
2 - Department of Chemistry, Marvdasht branch, Islamic Azad University, Marvdasht, Iran

تاریخ دریافت : 1393/08/05 تاریخ پذیرش : 1393/08/05 تاریخ انتشار : 1395/05/11

کلید واژه:

چکیده مقاله :

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.