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Separations, Volume 9, Issue 1

January 2022 - 20 articles

Cover Story: Natural phenols and phenolic acids are widespread in the plant kingdom, and the dietary sources include fruits and beverages derived from them. These compounds have been widely investigated for their beneficial effects on human health, and several analytical methods have been developed for their determination in these matrices. The GC-MS method presented here involves the derivatization of aromatic carboxylic acids and phenols with ethyl chloroformate; it is particularly advantageous as it can be carried out in aqueous media at room temperature, allowing excellent separation of many different phenolic compounds. This method has been used for the analysis of commercial fruit juices particularly rich in phenolic compounds. Among them, the richest in free aromatic carboxylic acids and phenols are those containing cranberry. View this paper
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Articles (20)

  • Article
  • Open Access
35 Citations
7,672 Views
15 Pages

Low-Cost and Eco-Friendly Hydroxyapatite Nanoparticles Derived from Eggshell Waste for Cephalexin Removal

  • Huda S. Alhasan,
  • Nadiyah Alahmadi,
  • Suhad A. Yasin,
  • Mohammed Y. Khalaf and
  • Gomaa A. M. Ali

This work describes the hydroxyapatite nanoparticle (HAP) preparation from eggshell waste and their application as an adsorbent for Cephalexin (Ceph) antibiotic removal from aqueous solutions. Chemical precipitation with phosphoric acid was used to e...

  • Article
  • Open Access
5 Citations
4,274 Views
11 Pages

Natural phenol and phenolic acids are widely distributed in the plant kingdom and the major dietary sources include fruits and beverages derived therefrom. Over the past decades, these compounds have been widely investigated for their beneficial effe...

  • Article
  • Open Access
11 Citations
10,200 Views
9 Pages

Ecdysterone is a naturally occurring steroid hormone of the ecdysteroid class. This group is widely marketed to athletes in dietary supplements as a “natural anabolic agent”, advertised to increase strength and muscle mass during resistance training,...

  • Article
  • Open Access
6 Citations
2,745 Views
17 Pages

Enantiomeric Separation and Molecular Modelling of Bioactive 4-Aryl-3,4-dihydropyrimidin-2(1H)-one Ester Derivatives on Teicoplanin-Based Chiral Stationary Phase

  • Isabella Bolognino,
  • Antonio Carrieri,
  • Rosa Purgatorio,
  • Marco Catto,
  • Rocco Caliandro,
  • Benedetta Carrozzini,
  • Benny Danilo Belviso,
  • Maria Majellaro,
  • Eddy Sotelo and
  • Saverio Cellamare
  • + 1 author

The enantiomeric separation of 15 racemic 4-aryl-3,4-dihydropyrimidin-2(1H)-one (DHP) alkoxycarbonyl esters, some of which proved to be highly active as A2B adenosine receptor antagonists, was carried out by HPLC on ChirobioticTM TAG, a chiral statio...

  • Article
  • Open Access
3 Citations
3,266 Views
17 Pages

Effect of Cone-Plate Clarifier Structure Parameters on Flocculation Efficiency

  • Yulong Zhang,
  • Peikun Liu,
  • Linjing Xiao,
  • Long Chang,
  • Fangping Yan and
  • Lanyue Jiang

In this study, a coal mine water flocculation system was established. A series of flocculation tests were carried out at different structural parameters (cylinder height, cone-plate insertion depth and cone-plate spacing) to better investigate the ef...

  • Article
  • Open Access
9 Citations
4,360 Views
14 Pages

A specific and sensitive approach using magnetic nanoparticle solid-phase extraction combined with gas chromatography-mass spectrometry (GC-MS) was carried out and applied in the simultaneous determination of 16 kinds of synthetic cathinones in human...

  • Article
  • Open Access
7 Citations
4,967 Views
17 Pages

In this study, a simple and environmentally friendly method was developed for the extraction of seven active coumarins from Angelica dahurica (Hoffm.) Benth. & Hook.f. ex Franch. & Sav.(A. dahurica) based on deep eutectic solvents (DESs)...

  • Article
  • Open Access
10 Citations
4,594 Views
16 Pages

The inherent strong hydrophobicity of Polytetrafluoroetylene (PTFE) microfiltration membranes results in low separation efficiency and easy contamination. In order to enhance its hydrophilic and antifouling properties, we first modified the PTFE micr...

  • Review
  • Open Access
126 Citations
19,029 Views
44 Pages

This review investigates antifouling agents used in the process of membrane separation (MS), in reverse osmosis (RO), ultrafiltration (UF), nanofiltration (NF), microfiltration (MF), membrane distillation (MD), and membrane bioreactors (MBR), and cla...

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Separations - ISSN 2297-8739