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Separations, Volume 6, Issue 2

June 2019 - 14 articles

Cover Story: For the first time, a combined cation and anion exchange adsorption method is presented that can effectively separate 1,2-dimethyl-3-propylimidazolium bis(trifluoromethylsulfonimide) [DMPIm][NTf2] ionic liquid from neutral impurities. More importantly, the method is capable of recovery and recycling of the original ionic liquid. Concomitant desorption of both ionic liquid ions was achieved from elution followed by isolation using liquid-liquid extraction to afford very high purity products and yields of approximately 60%. View this paper.

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Articles (14)

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Article

7 Citations

3,653 Views

9 Pages

An On-Line Flow-Injection Sorbent Extraction System Coupled with Flame Atomic Absorption Spectrometry for Thallium Determination Using a PTFE Turning-Packed Column

Viktoria Kazantzi and
Aristidis Anthemidis

Separations2019, 6(2), 22;https://doi.org/10.3390/separations6020022

16 April 2019

A novel time-based flow-injection–solid-phase extraction system (FI–SPE) coupled with flame atomic absorption spectrometry (FAAS) for automatic on-line preconcentration and determination of thallium was developed. The efficiency of poly-t...

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Article

28 Citations

5,815 Views

9 Pages

Development of a High Pressure Liquid Chromatography with Diode Array Detection Method for the Determination of Four Tetracycline Residues in Milk by Using QuEChERS Dispersive Extraction

Eirini Marinou,
Victoria F. Samanidou and
Ioannis N. Papadoyannis

Separations2019, 6(2), 21;https://doi.org/10.3390/separations6020021

9 April 2019

QuEChERS (quick, easy, cheap, effective, rugged and safe) dispersive extraction was applied for the extraction of tetracyclines (oxytetracycline, tetracycline, chlorotetracycline and doxycycline) from milk. Target analytes were determined by an accur...

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Article

27 Citations

6,006 Views

18 Pages

Treatment of Tannery Wastewater with Vibratory Shear-Enhanced Processing Membrane Filtration

Anastasios I. Zouboulis,
Efrosyni N. Peleka and
Anastasia Ntolia

Separations2019, 6(2), 20;https://doi.org/10.3390/separations6020020

8 April 2019

The performance of a vibratory shear-enhanced process (VSEP) combined with an appropriate membrane unit for the treatment of simulated or industrial tannery wastewaters was investigated. The fundamental operational and pollution parameters were evalu...

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Article

35 Citations

5,804 Views

10 Pages

Evaluating the Adsorbed Water Layer on Polar Stationary Phases for Hydrophilic Interaction Chromatography (HILIC)

Yong Guo,
Nidhi Bhalodia,
Bassel Fattal and
Ioannis Serris

Separations2019, 6(2), 19;https://doi.org/10.3390/separations6020019

1 April 2019

The water-rich liquid layer immobilized on the surface of the polar stationary phases is critical to the retention of polar compounds in hydrophilic interaction chromatography (HILIC). Although the presence of the adsorbed water layer has been invest...

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