Magnetic iron oxide nanoparticles {lvlNPs] are attracting increased attention due to their interesting properties that can be applied in a large number of applications such as solid phase extraction (SPE}. electrochemical determinations, catalysis and biomedicinc. The two most common iron oxides, including magnetite and maghemite, are frequently used for various specific applications. For most of their applications. the magnetic behavior of iron oxide nanoparticles in a fluid is very impottant- especially. the high-gradient magnetic separation of the particles from a non-magnetic liquid medium such as biological fluid and water samples. lv’[NPs can be used in SPE as an adsorbent andfor magnetic carrier for the preparation of magnetic adsorbents. Various functionalization strategies, including chemical or physical loading of proper modifiers, can be applied for the enhancement of adsorption efficiency factors such as adsorption capacity, selectivity. adsorption time and etc. In an interesting case, these nanoparticles can be coated with a layer of molecularly imprinted polymer {lvilP) for selectivity enhancements of adsorption process [I]. The MTP can be fonned on the l'viNPs as a core-shell layer and enhances the selectivity of the adsorbent toward the imprinted analyte. Furthermore, these nanoparticles can be used in electrochemical studies for construction of working electrodes as nano modifiers [2]. The role of the nanoparticles as modifiers is electrode surface increasing and surface adsorption selectivity enhancement. Researchers are constantly worlting on new applications for lvlNPs in biological, chemical, and industrial areas. The aim of this presentation is to review and introduce some of the new applications of lvlNPs in Analytical Chemistry that recently have been reported by our research group. These applications include nanosensors based on resonance light scattering techniques, chiral adsorbents for enantiomeric resoiution and magnetic materials for constru
