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Separations, Volume 4, Issue 1

March 2017 - 9 articles

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Cover Story: For the first time, reversed-phase liquid chromatographic separations of small molecules have been achieved using a graphene oxide nanoparticle (GONP)-modified polystyrene-divinylbenzene polyHIPE capillary column. GONP polyHIPEs were found to have a surface area up to 40% lower than unmodified polyHIPEs, but demonstrated superior analyte adsorption properties. This work indicates the potential offered by GO-polyHIPEs in flow through applications such as adsorption or separation processes. View Paper here.

Articles (9)

  • Article
  • Open Access
6 Citations
6,259 Views
11 Pages

The performance of a miniaturized channel for the separation of polymer and metal nanoparticles (NP) using Asymmetrical Flow Field-Flow Fractionation (AF4) was investigated and compared with a conventional AF4 system. To develop standard separation m...

  • Article
  • Open Access
10 Citations
6,353 Views
11 Pages

Byproducts of winery industries are treated, in many cases, as useless wastes constituting not only a major disposal problem but also not providing any additional profit to the industries. However, these byproducts could be utilized as a source of va...

  • Article
  • Open Access
10 Citations
9,993 Views
12 Pages

Simultaneous quantitative analysis of 10 indole compounds, including indole-3-acetic acid (IAA, one of the most important naturally occurring auxins) and some of its metabolites, by high performance liquid chromatography (HPLC) and liquid chromatogra...

  • Feature Paper
  • Review
  • Open Access
51 Citations
10,087 Views
16 Pages

The extraction yield of a microextraction technique depends on thermodynamic and kinetics factors. Both of these factors have been the focus of intensive research in the last few years. The extraction yield can be increased by synthesizing and using...

  • Article
  • Open Access
9 Citations
6,155 Views
13 Pages

This work presents the first instance of reversed-phase liquid chromatographic separation of small molecules using graphene oxide nanoparticle-modified polystyrene-divinylbenzene polymeric high internal phase emulsion (GONP PS-co-DVB polyHIPE) materi...

  • Article
  • Open Access
3 Citations
5,240 Views
9 Pages

As for the measurement of polycyclic aromatic hydrocarbons (PAHs), ultra-performance liquid chromatography (UPLC) is used for PAH identification and densitometry. However, when a solvent containing a substance to be identified passes through a column...

  • Article
  • Open Access
12 Citations
5,950 Views
8 Pages

Coffee is a favorite and beverage in Western countries that is consumed daily. In the present study, capillary zone electrophoresis (CE) was applied for the separation and quantification of three isoflavones including daidzein, genistein and formonon...

  • Feature Paper
  • Review
  • Open Access
21 Citations
9,281 Views
22 Pages

Nano-Doped Monolithic Materials for Molecular Separation

  • Caleb Acquah,
  • Eugene Marfo Obeng,
  • Dominic Agyei,
  • Clarence M. Ongkudon,
  • Charles K. S. Moy and
  • Michael K. Danquah

Monoliths are continuous adsorbents that can easily be synthesised to possess tuneable meso-/macropores, convective fluid transport, and a plethora of chemistries for ligand immobilisation. They are grouped into three main classes: organic, inorganic...