Graphene for separation and preconcentration of trace amounts of cobalt in water samples prior to flame atomic absorption spectrometry

Synthesis, characterization, structure determination from powder X-ray diffraction data, and biological activity of azo dye of 3-aminopyridine and its complexes of Ni(II) and Cu(II)

“…1-(2-Pyridylazo)-2-naphthol considers well-known azo dye with term PAN which forms stable complexes with many metal elements [2]. In the same time, it is sensitive for trace concentration of metal elements and trace elements [5,6]. This kind of complexes is highly colored therefore some of them used as dyes and pigments which leads to use it as inkjet printing and toner.…”

Speciation and determination of inorganic arsenic species in water and biological samples by ultrasound assisted-dispersive-micro-solid phase extraction on carboxylated nanoporous graphene coupled with flow injection-hydride generation atomic absorption spectrometry

“…36 However, adsorption of metal ions on graphene nanosheets oen requires formation of hydrophobic complexes using chelating agents. 32,33,45 Herein, the development of functionalized graphene is recommended. Functionalization may further enhance the selectivity of SPE.…”

Determination of Cobalt in Seawater Using Neutron Activation Analysis after Preconcentration by Adsorption ontoγ-MnO2Nanomaterial

“…Therefore, the separation of cobalt from the sample matrices as well as the preconcentration of cobalt is crucial for the accurate and efficient determinations of cobalt at the ultratrace levels in seawater. Various methods in addition to the modern instrumental methods have been used to enrich the level of cobalt in seawater, such as the coprecipitation [2], liquidliquid phase extraction [5], and solid phase extraction [6,7].…”