Preconcentration and determination of lead ions in fish and mollusk tissues by nanocomposite of Fe3O4@graphene oxide@polyimide as a solid phase extraction sorbent

2017 ◽  
Vol 237 ◽  
pp. 1112-1117 ◽  
Author(s):  
Ali Mehdinia ◽  
Maryam Ramezani ◽  
Ali Jabbari
Keyword(s):  
Graphene Oxide ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Lead Ions ◽  
Phase Extraction

scholarly journals Trace determination of chlorpheniramine in human plasma using magnetic dispersive solid-phase extraction based on a graphene oxide/Fe3O4@polythionine nanocomposite combined with high-performance liquid chromatography

RSC Advances ◽  
2017 ◽  
Vol 7 (84) ◽  
pp. 53210-53218 ◽  
Author(s):  
Maryam Ahmadi Daryakenary ◽  
Mohsen Zeeb
Keyword(s):  
High Performance Liquid Chromatography ◽  
Graphene Oxide ◽  
Liquid Chromatography ◽  
Solid Phase Extraction ◽  
Human Plasma ◽  
High Performance ◽  
Solid Phase ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction

Graphene oxide/Fe3O4@polythionine (GO/Fe3O4@PTh) nanocomposite was fabricated for magnetic dispersive solid-phase extraction and high-performance liquid chromatography-ultraviolent detection (HPLC) of chlorpheniramine in human plasma.

scholarly journals Multi-Element Determination of Toxic and Nutrient Elements by ICP-AES after Dispersive Solid-Phase Extraction with Modified Graphene Oxide

2020 ◽  
Vol 10 (23) ◽  
pp. 8722
Author(s):  
Natalia Manousi ◽  
Eleni Deliyanni ◽  
George Zachariadis
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Emission Spectrometry ◽  
Local Market ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Modified Graphene Oxide

A novel graphene-oxide-derived material was synthesized after modification of graphene oxide with sodium hydroxide and used for the dispersive solid-phase extraction (d-SPE) of different elements (Pb, Cd, Ba, Zn, Cu and Ni) prior to their determination by inductively coupled plasma atomic emission spectrometry (ICP-AES). The prepared nanomaterial was characterized by X-ray diffraction (XRD), nitrogen adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy. Full factorial design and Derringer’s type desirability function were used for the optimization of the d-SPE procedure. Pareto charts illustrated the effects of each of the examined factors and their interactions on the determination of the elements. Under the optimum conditions, detection limits (LODs) for the elements ranged between 0.01 and 0.21 μg g−1, intra-day repeatability (n = 5) was lower than 1.9% and inter-day repeatability (n = 5 × 3) was lower than 4.7%. Relative recovery values ranged between 88.1 and 117.8%. The method was validated and successfully applied for the determination of trace elements in poultry, pork and beef samples from the local market. The proposed method is simple, rapid, sensitive and the novel sorbent can be used at least ten times.

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