Feature Paper Collection in Section 'Environmental Separations'

A topical collection in Separations (ISSN 2297-8739). This collection belongs to the section "Environmental Separations".

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Editors


E-Mail Website
Collection Editor
1. Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Porto, Portugal
2. CIIMAR-Interdisciplinary Centre of Marine and Environmental Research, Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
3. TOXRUN–Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, 4585-116 Gandra, Portugal
Interests: organic and pharmaceutical chemistry; chromatography; chiral separation; organic environmental pollutants; enantiotoxicity
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Collection Editor
1. Associate Laboratory i4HB—Institute for Health and Bioeconomy, University Institute of Health Sciences—CESPU, 4585-116 Gandra, Portugal
2. UCIBIO—Applied Molecular Biosciences Unit, Translational Toxicology Research Laboratory, University Institute of Health Sciences (1H-TOXRUN, IUCS-CESPU), 4585-116 Gandra, Portugal
Interests: chromatography; chiral drugs; pharmaceuticals; environmental contaminants
Special Issues, Collections and Topics in MDPI journals

Topical Collection Information

Dear Colleagues,

Separations has launched a new collection of feature papers in the field of environmental analysis to promote the publication of high-quality original research and review articles on basic and applied analytical methods that address environmental matrices. This Topical Collection is dedicated to publishing studies regarding innovative sample preparation methodologies, monitoring studies in fields or in laboratory scale experiences. Analytical methods to monitor environmental matrices, such as soils, sewage, wastewaters, surface, ground and drinking water are welcome. Innovation in analytical methods regarding monitoring the (bio)degradation of pharmaceuticals and pesticides should also be considered. Liquid, gas and supercritical fluid chromatography are separation techniques that form the basis of this Topical Collection, with a special focus on two-dimensional liquid chromatography (2D-LC) and chiral analyses.

Contributions to this Topical Collection should be always related to new or innovative separation methods or principles. Research articles that aim to solve separation problems within emerging green technology with absence of hazard solvents and minimal waste production will be most welcome. Review papers should provide a critical assessment of state-of-the-art developments in a specific topic related to novel methodologies for environmental analysis. All manuscripts will undergo a rigorous peer-review process to be considered for publication in this Topical Collection.

Dr. Maria Elizabeth Tiritan
Dr. Cláudia Maria Rosa Ribeiro
Collection 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 collection 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.

Keywords

  • pharmaceuticals residues
  • pesticides
  • sample preparation
  • two-dimensional liquid chromatography
  • chiral analysis
  • biodegradation
  • surface water
  • soils
  • wastewater
  • drinking water

Published Papers (2 papers)

2024

19 pages, 2061 KiB  
Article
Development of an Enantioselective Method by Liquid Chromatography to Monitor 3,4-Methylenedioxypyrovalerone in Culture Media from Ecotoxicity Assays
by Ariana Pérez-Pereira, Virgínia M. F. Gonçalves, Ana R. L. Ribeiro, Carla Fernandes, João S. Carrola, Cláudia Ribeiro and Maria E. Tiritan
Separations 2024, 11(8), 248; https://doi.org/10.3390/separations11080248 - 16 Aug 2024
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Abstract
3,4-Methylenedioxypyrovalerone (MDPV) is an emerging, chiral, new psychoactive substance belonging to the synthetic cathinones group that has been frequently detected in wastewater effluents and aquatic environments. However, the knowledge of its enantioselective occurrence and toxicity toward aquatic organisms is scarce. The aim of [...] Read more.
3,4-Methylenedioxypyrovalerone (MDPV) is an emerging, chiral, new psychoactive substance belonging to the synthetic cathinones group that has been frequently detected in wastewater effluents and aquatic environments. However, the knowledge of its enantioselective occurrence and toxicity toward aquatic organisms is scarce. The aim of this work was to develop an enantioselective liquid chromatography (LC) method to monitor the enantiomers of MDPV in environmental and ecotoxicological assays. For that, different chiral columns and mobile phases in both normal and reversed elution modes were attempted. The optimized conditions were achieved using a Daicel® 3 μm—CHIRALPAK® IF-3 column with 5 mM of ammonium bicarbonate (NH4HCO3, pH 8.8) in ultra-pure water (UPW) and acetonitrile (ACN) (10:90, v/v) as a mobile phase, at a flow rate of 0.3 mL min−1. This condition was applied to monitor the racemate and the single enantiomers of MDPV in culture medium collected from ecotoxicity experiments. Racemization was observed for MDPV enantiomers (in individual exposure). The enantiomeric ratio (e.r.) of (S)-MDPV changed from an initial e.r. of 96.4/3.6 to 78.0/22.0 and for the (R)-enantiomer, the e.r changed from 15.6/84.4 to 28.3/71.7). These data highlight the importance of enantioselective monitoring of culture media in toxicity assays that involve chiral substances, since racemization can occur and lead to inaccuracy in the toxicity evaluation. Nevertheless, it is also important to stress that racemization may occur during storage conditions or sample procedures. Therefore, the enantioselective methodology is of utmost importance to warrant the quality of the results in enantioselective ecotoxicological studies. Full article
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Figure 1

16 pages, 804 KiB  
Article
Simultaneous Determination of Multiresidues of Pesticides and Veterinary Drugs in Agricultural Soil Using QuEChERS and UHPLC–MS/MS
by Michele C. Vicari, Janice F. Facco, Sandra C. Peixoto, Gabriel S. de Carvalho, Luana Floriano, Osmar D. Prestes, Martha B. Adaime and Renato Zanella
Separations 2024, 11(6), 188; https://doi.org/10.3390/separations11060188 - 14 Jun 2024
Cited by 1 | Viewed by 1024
Abstract
Soil is one of the main destinations for pesticides and veterinary drugs used in agriculture and animal production. The negative consequences of the accumulation of these compounds in the environment make it important to monitor these compounds in the soil. In this study, [...] Read more.
Soil is one of the main destinations for pesticides and veterinary drugs used in agriculture and animal production. The negative consequences of the accumulation of these compounds in the environment make it important to monitor these compounds in the soil. In this study, we compared different extraction procedures using solvent shaking, ultrasound, or QuEChERS, and their combinations, for the simultaneous determination of 75 pesticide and seven veterinary drug residues in agricultural soil by ultra-high performance liquid chromatography coupled to serial mass spectrometry (UHPLC–MS/MS). The method using QuEChERS combined with shaking showed the best results for soil using the addition of water, followed by extraction with acetonitrile acidified with acetic acid and shaking in a shaker. For partitioning, anhydrous magnesium sulfate and anhydrous sodium acetate were used. The extract was centrifuged, filtered, and diluted (1:4, v/v) in water for determination by UHPLC–MS/MS. Method validation showed adequate accuracy and precision results, with recoveries between 70 and 120% and RSD ≤ 20% for the vast majority of the compounds evaluated at the spike levels of 10, 25, 50, and 100 μg kg−1. The method limits of detection (LOD) and quantification (LOQ) ranged from 3.0 to 7.5 μg kg−1 and from 10 to 25 μg kg−1, respectively. The method was applied to different agricultural soil samples and proved to be efficient for routine analysis. Full article
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Graphical abstract

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