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Separations
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Research as Development Perspective 2019
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Research as Development Perspective 2019

A special issue of Separations (ISSN 2297-8739).

Deadline for manuscript submissions: closed (15 March 2020) | Viewed by 18301

Special Issue Editors

Prof. Dr. Victoria Samanidou

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Guest Editor
Laboratory of Analytical Chemistry, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: analytical chemistry; sample preparation; chromatography; HPLC; method validation; method development; separation science; food analysis; bioanalysis; environmental analysis; green analytical chemistry; sorptive extraction; microextraction techniques
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. George Zachariadis

E-Mail Website
Guest Editor
Department of Chemistry, Aristotle University, 54124 Thessaloniki, Greece
Interests: hyphenated techniques and mass spectrometry; atomic spectrometry techniques; speciation analysis; sample pretreatment techniques; chemometrics
Special Issues, Collections and Topics in MDPI journals
Dr. Michael A. Terzidis

E-Mail Website
Guest Editor
Laboratory of Chemical and Environmental Technology, Aristotle University of Thessaloniki, Thessaloniki, Greece
Interests: organic synthesis; heterocyclic chemistry; process chemistry; radical chemistry
Special Issues, Collections and Topics in MDPI journals
Dr. Adamantini Paraskevopoulou

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Guest Editor
Laboratory of Food Chemistry and Technology, School of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: food biopolymers; alternative proteins; technofunctional properties; food dispersion systems (emulsions, foams); gels; protein recovery from animal or plant raw materials or industrial by-products; aroma profile analysis; flavour retention; flavour encapsulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This special issue "Research as Development Perspective" is dedicated to the 3rd Conference in Chemistry for Graduate, Postgraduate Students, and PhD candidates in Aristotle University of Thessaloniki (https://3chemauth.wordpress.com/info-in-english/) and the data presented therein, which is the outcome of the research activities of the young chemists in Northern Greece.

The scope of this 3rd conference that is going to be held on 22nd-23rd November 2019 in Thessaloniki, Greece, is to give the young colleagues and the graduate students the opportunity to prepare themselves for the next steps in their career development, and to meet the requirements of a demanding working environment. Moreover it sets the ground for their active engagement and the space to highlight both their research activity and their presentation skills in front of a large audience. Moreover, their direct involvement in the organization of the conference is aiming to strengthen their organization, management and communication skills, all marked as «asset-skills» by most of the high profile employers.

The conference is organized by the:

  • Chemistry Department of Aristotle University of Thessaloniki (AUTH)
  • Association of Greek Chemists-Division of Central and Western Macedonia (AGC-DCWM)
  • Association of Chemists in Northern Greece

Scientific Topics covered in Special Issue

  1. Analytical Chemistry-Quality Control
  2. Inorganic-Bioinorganic Chemistry-Nanotechnology
  3. Archaeometry- Maintenance and restoration of cultural monuments
  4. Biochemistry-Clinical Chemistry
  5. Chemical Education and Teaching
  6. Organic Chemistry-Natural Products
  7. Physical- Theoretical and Computational Chemistry
  8. Toxicology-Medicinal Chemistry-Quality Control
  9. Environmental Chemistry and Technology-Pollution Control
  10. Polymer Chemistry and Technology
  11. Food Chemistry and Technology
  12. Chemical Technology-Materials- Green Chemistry

Prof. Dr. Victoria F. Samanidou
Prof. Dr. George Zachariadis
Dr. Michael A. Terzidis
Dr. Adamantini Paraskevopoulou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Separations is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (5 papers)

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Editorial

Jump to: Research

4 pages, 199 KiB  
Editorial
The Pivotal Role of Chemistry in Research and Development
by Victoria Samanidou, George Zachariadis, Michael A. Terzidis and Adamantini Paraskevopoulou
Separations 2022, 9(1), 4; https://0-doi-org.brum.beds.ac.uk/10.3390/separations9010004 - 23 Dec 2021
Cited by 1 | Viewed by 2272
Abstract
Undoubtedly, all pivotal advances in a great number of scientific fields rely on advances in chemistry. [...] Full article
(This article belongs to the Special Issue Research as Development Perspective 2019)

Research

Jump to: Editorial

12 pages, 3015 KiB  
Article
Study of the Oxidative Forced Degradation of Glutathione in Its Nutraceutical Formulations Using Zone Fluidics and Green Liquid Chromatography
by Apostolia Tsiasioti, Constantinos K. Zacharis, Anastasia-Stella Zotou and Paraskevas D. Tzanavaras
Separations 2020, 7(1), 16; https://0-doi-org.brum.beds.ac.uk/10.3390/separations7010016 - 03 Mar 2020
Cited by 4 | Viewed by 3410
Abstract
In the present study, we report the results of our investigation of the oxidative forced degradation of glutathione in its nutraceutical formulations by two validated analytical methods. The first is based on the reaction of glutathione with o-phthalaldehyde through an automated zone [...] Read more.
In the present study, we report the results of our investigation of the oxidative forced degradation of glutathione in its nutraceutical formulations by two validated analytical methods. The first is based on the reaction of glutathione with o-phthalaldehyde through an automated zone fluidics flow platform and fluorimetric detection (λex/λem = 340/425 nm). The second is based on the separation of glutathione and its oxidation product by a green reversed-phase HPLC method coupled to direct UV detection, at 210 nm. A solution of 3% w/v H2O2 provided fast oxidation of more than 95% of glutathione to yield oxidized glutathione in a time period of 180 min. The mechanism of the oxidation was proved to follow pseudo-first order kinetics. The k, t90 and t1/2 values were calculated. Full article
(This article belongs to the Special Issue Research as Development Perspective 2019)
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9 pages, 236 KiB  
Article
Titanium and Chromium Determination in Feedstuffs Using ICP-AES Technique
by Eleni Tsanaktsidou and George Zachariadis
Separations 2020, 7(1), 1; https://0-doi-org.brum.beds.ac.uk/10.3390/separations7010001 - 20 Dec 2019
Cited by 8 | Viewed by 4317
Abstract
The present study represents the determination of Ti and Cr in dry animal feeds using wet acid digestion and inductively coupled plasma–atomic emission spectrometry (ICP-AES), in order to use these metals as digestibility markers. A radiofrequency power of 1350 W and a nebulizer [...] Read more.
The present study represents the determination of Ti and Cr in dry animal feeds using wet acid digestion and inductively coupled plasma–atomic emission spectrometry (ICP-AES), in order to use these metals as digestibility markers. A radiofrequency power of 1350 W and a nebulizer argon flow of 0.8 L/min was selected. The limits of detection were between 11.4 and 16.1 μg/g for titanium and between 10.7 and 38.2 μg/g for chromium. The recovery values for the aqueous solutions were 89.5–103.9% (titanium) and 85.3–104.2% (chromium), with relative standard deviations (RSD%) under 2.1% and standard errors under 2.32%, demonstrating that the method offered good accuracy and repeatability. Six different samples of commercially available feedstuffs (two cat foods, two dog foods, and two poultry foods) were analyzed and the levels of investigated metals were found to be in the ranges of 0.10 g/kg and <LOD for chromium and titanium, respectively (dog foods); 0.10–0.18 g/kg, 0.70 g/kg for chromium and titanium, respectively (cat foods); and 0.07 g/kg, 0.82–1.35 g/kg for chromium and titanium, respectively (poultry foods). Full article
(This article belongs to the Special Issue Research as Development Perspective 2019)
9 pages, 641 KiB  
Article
An On-Line Flow-Injection Sorbent Extraction System Coupled with Flame Atomic Absorption Spectrometry for Thallium Determination Using a PTFE Turning-Packed Column
by Viktoria Kazantzi and Aristidis Anthemidis
Separations 2019, 6(2), 22; https://doi.org/10.3390/separations6020022 - 16 Apr 2019
Cited by 4 | Viewed by 2870
Abstract
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-tetrafluoroethylene (PTFE) turnings packed into a column as sorbent material was investigated for thallium extraction. Total [...] Read more.
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-tetrafluoroethylene (PTFE) turnings packed into a column as sorbent material was investigated for thallium extraction. Total thallium was determined by oxidizing thallium(I) to thallium(III), adding bromine in acidic solution. The formed [TlBr4]− anionic bromo complex was retained onto the PTFE turnings by on-line mixing with sodium diethyl dithiocarbamate (DDTC). The preconcentrated Tl(III)-DDTC complex was then effectively eluted with methyl isobutyl ketone (MIBK) and introduced into the flame atomizer for measurement and quantification. The column proved to be effective, stable, and reproducible, with a long lifetime. The enrichment factor was 105 for 60 s preconcentration time, and the sampling frequency 40 h−1. The detection limit was 1.93 μg L−1, and the relative standard deviation (RSD) was 3.2% at 50.0 μg L−1 concentration. The accuracy of the proposed method was estimated by analyzing certified reference materials and environmental and biological samples. Full article
(This article belongs to the Special Issue Research as Development Perspective 2019)
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9 pages, 1423 KiB  
Article
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
by Eirini Marinou, Victoria F. Samanidou and Ioannis N. Papadoyannis
Separations 2019, 6(2), 21; https://0-doi-org.brum.beds.ac.uk/10.3390/separations6020021 - 09 Apr 2019
Cited by 23 | Viewed by 4523
Abstract
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 accurate and sensitive chromatographic analytical method, which was validated in terms of 2002/6572/EC [...] Read more.
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 accurate and sensitive chromatographic analytical method, which was validated in terms of 2002/6572/EC decision. The analytes were separated on an Orbit 100C4 (5 μm, 250 × 4.0 mm) analytical column under a gradient mobile phase composed of a mixture of 0.01 M oxalic acid, 10−4 M Na2EDTA and acetonitrile. For the extraction of isolated compounds from sorbent, a methanol and 0.01 M oxalic acid mixture (1:1 v/v) was used, leading to relative recovery rates from 83.07% to 106.3% at concentration levels in the range 100–200 μg/kg. The within-laboratory reproducibility, expressed as a relative standard deviation, was <15.5%. Decision limits ranged between 100.3 μg/kg and 105.6 μg/kg and the detection capability varied between 100.6 μg/kg and 109.7 μg/kg. Ruggedness was evaluated by following the Youden approach, in terms of milk mass, sorbent mass, centrifugation time, vortex time, type and volume of organic solvents and evaporation temperature. Full article
(This article belongs to the Special Issue Research as Development Perspective 2019)
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