Document Type : Research Paper
Solid phase extraction (SPE) or liquid-solid extraction is poplar and growing techniques that are
used to sample preparation for analysis. Metal nanoparticles have been studied for decades, and this is due to the properties that these materials do not have in bulk state. In nanoscale materials, the numbers of surface atoms is high and hence, have significant surface effects. A novel, simple, sensitive and effective method has been developed for preconcentration of Cd(II) on nanographene with aminopropyltriethoxysilane (APTES) on surfactant coated C18 solid-phase extraction adsorbent. Flame atomic absorption spectrometer was utilized for determination ofCd(II). Some of the important parameters on the preconcentration and complex formation were selected and optimized. Under the optimized conditions the limit of detection (LOD) and limit of quantification (LOQ)were 0.032μg.L-1, 163.7 ng L-1and the proposed method has a good reproducibility 0.81% (RSD %) andpreconcentration factor was found to be 200.The methodology was applied for determination of Cd (II) in natural water samples and satisfactory results were obtained.