Magnetic microsphere-confined graphene for the extraction of polycyclic aromatic hydrocarbons from environmental water samples coupled with high performance liquid chromatography–fluorescence analysis

Magnetic solid phase extraction of gemfibrozil from human serum and pharmaceutical wastewater samples utilizing a β-cyclodextrin grafted graphene oxide-magnetite nano-hybrid

“…Carbon-based nanomaterials, which have unique ʌ-electronic structure, have been used as excellent adsorbents in cleanup procedures [6]. Recently, Graphene, as a newly found carbon-based nanomaterial with fascinating two-dimensional atomic thickness structure and large theoretical specific surface area, has attracted wide attention and become a hot research tide [7]. However, there are main drawbacks in the usage of graphene as a sorbent material.…”

A novel strategy for spectrophotometric simultaneous determination of amitriptyline and nortriptyline based on derivation with a quinonoid compound in serum samples

“…The MSPE has some advantages such as excellent adsorption efficiency, rapid separation from the matrix through external magnetic field without retaining residual magnetization after its removal, and has recently exhibited significant advantages in separation science [26][27][28]. The Fe 3 O 4 @SiO 2 -ionic liquid (Fe 3 O 4 @SiO 2 -IL) is composed of a core-shell structure with a core of dense and globular magnetic nanoparticles, and a SiO 2 -IL shell that the magnetic property of the core solved the separation difficulty, while the shell-type mesoporous structure shortens the diffusion path, and increases the effective area for adsorption [29,30]. This paper describes the development and validation of an efficient analytical method by a combination of MSPE, and spectrophotometric techniques for the simultaneous determination of AT and NT in the serum sample.…”

Magnetic solid phase extraction and gas chromatography–mass spectrometrical analysis of sixteen polycyclic aromatic hydrocarbons

“…Effective extraction and preconcentration techniques prior to instrumental analysis are often required. The widely used pre-treatment method at present for PAHs from aqueous samples are mainly sorbent based techniques, such as solid phase extraction (SPE) [11][12][13][14], microsolid-phase extraction (-SPE) [15], and magnetic solid-phase extraction (MSPE) [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. MSPE is a procedure for the preconcentration of target analytes from large volumes by using magnetic or magnetizable sorbents [30], which can be easily separated from sample solutions by an external magnetic field without the need of additional centrifugation or filtration.…”