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Separations
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Novel Sample Preparation Techniques
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Novel Sample Preparation Techniques

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

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 16777

Special Issue Editor

Dr. Núria Fontanals

E-Mail Website
Guest Editor
Universitat Rovira i Virgili, Department of Analytical Chemistry and Organic Chemistry, Tarragona, Spain
Interests: extraction techniques; sorption materials; chromatography; mass spectrometry; contaminants; environmental analysis

Special Issue Information

Dear Colleagues,

Sample preparation still is a key part in the whole analytical procedure, since it enriches the compounds of interest to enhance the sensitivity of the method and enables the clean-up of complex matrices to ride out the interferences. There are different types of sample preparation techniques such as solid-phase extraction, solid-phase microextraction or pressurized liquid extraction, which uses depends on the physical state of the sample (solid, liquid or gas) as well as the chemical properties of the compounds (i.e. polarity). Anyhow, research is still on-going to improve the well-established sample preparation techniques and to implement novel strategies in this field. In recent years, because of the emergence of high-tech technology, one of the goals in sample preparation techniques has been focused on achieving effective clean-up of the samples. Other goals are moving towards automatization, miniaturization and reduction/elimination of the organic solvents (promoting the green procedures).

This Special Issue invites contributions, as original research articles or reviews, on the recent advances on the development, evaluation and application of novel sample preparation techniques.

Dr. Núria Fontanals
Guest Editor

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.

Keywords

  • Sample preparation
  • Extraction techniques
  • Clean-up
  • Preconcentration
  • Automatization
  • Miniaturization
  • Green techniques

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Published Papers (3 papers)

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Review

28 pages, 6444 KiB  
Review
Recent Advances in Molecularly Imprinted Membranes for Sample Treatment and Separation
by Sagrario Torres-Cartas, Mónica Catalá-Icardo, Susana Meseguer-Lloret, Ernesto F. Simó-Alfonso and José Manuel Herrero-Martínez
Separations 2020, 7(4), 69; https://doi.org/10.3390/separations7040069 - 30 Nov 2020
Cited by 20 | Viewed by 3797
Abstract
This review describes the recent advances from the past five years concerning the development and applications of molecularly imprinted membranes (MIMs) in the field of sample treatment and separation processes. After a short introduction, where the importance of these materials is highlighted, a [...] Read more.
This review describes the recent advances from the past five years concerning the development and applications of molecularly imprinted membranes (MIMs) in the field of sample treatment and separation processes. After a short introduction, where the importance of these materials is highlighted, a description of key aspects of membrane separation followed by the strategies of preparation of these materials is described. The review continues with several analytical applications of these MIMs for sample preparation as well as for separation purposes covering pharmaceutical, food, and environmental areas. Finally, a discussion focused on possible future directions of these materials in extraction and separation field is also given. Full article
(This article belongs to the Special Issue Novel Sample Preparation Techniques)
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Graphical abstract

24 pages, 279 KiB  
Review
Applications of Hollow-Fiber and Related Microextraction Techniques for the Determination of Pesticides in Environmental and Food Samples—A Mini Review
by Helena Prosen
Separations 2019, 6(4), 57; https://doi.org/10.3390/separations6040057 - 9 Dec 2019
Cited by 9 | Viewed by 3257
Abstract
Pesticides represent one of the most important groups of analytes in environmental analysis. Moreover, their levels are very frequently determined in food and beverages due to the concern over their possible adverse health effects. Their concentration in samples is usually very low; thus, [...] Read more.
Pesticides represent one of the most important groups of analytes in environmental analysis. Moreover, their levels are very frequently determined in food and beverages due to the concern over their possible adverse health effects. Their concentration in samples is usually very low; thus, they have to be preconcentrated. Conventional solvent and solid-phase extractions are mainly used for this purpose, but miniaturized approaches are also being applied more and more often. The present review covers solvent microextractions that use a semi-permeable membrane barrier between the sample and the solvent. The main representatives of this approach are hollow-fiber microextraction (HFME), solvent bar microextraction (SBME), electromembrane extraction (EME), and different variations of those, such as combinations with other sorbent or solvent microextractions, electromigration, etc. The relevant research from the last decade, dealing with the application of these microextractions to the isolation of pesticides from various environmental and food samples, is critically discussed with emphasis on their strengths and weak points. Full article
(This article belongs to the Special Issue Novel Sample Preparation Techniques)
27 pages, 2768 KiB  
Review
Materials for Solid-Phase Extraction of Organic Compounds
by Núria Fontanals, Rosa M. Marcé and Francesc Borrull
Separations 2019, 6(4), 56; https://doi.org/10.3390/separations6040056 - 6 Dec 2019
Cited by 42 | Viewed by 9001
Abstract
This review provides an overview of the most recent developments involving materials for solid-phase extraction applied to determine organic contaminants. It mainly concerns polymer-based sorbents that include high-capacity, as well as selective sorbents, inorganic-based sorbents that include those prepared using sol-gel technology along [...] Read more.
This review provides an overview of the most recent developments involving materials for solid-phase extraction applied to determine organic contaminants. It mainly concerns polymer-based sorbents that include high-capacity, as well as selective sorbents, inorganic-based sorbents that include those prepared using sol-gel technology along with structured porous materials based on inorganic species, and carbon nanomaterials, such as graphene and carbon nanotubes. Different types of magnetic nanoparticles coated with these materials are also reviewed. Such materials, together with their main morphological and chemical features, are described, as are some representative examples of their application as solid-phase extraction materials to extract organic compounds from different types of samples, including environmental water, biological fluids, and food. Full article
(This article belongs to the Special Issue Novel Sample Preparation Techniques)
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