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Membranes
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Advances in Supported Liquid Membranes
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Advances in Supported Liquid Membranes

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 9785

Special Issue Editors

Prof. Dr. Piotr P. Wieczorek

E-Mail Website
Guest Editor
Faculty of Chemistry, University of Opole, ul. Oleska 48, 45-052 Opole, Poland
Interests: analytical chemistry; organic chemistry; sample preparation; enantiomers separation; natural products isolation; structure determination; membrane techniques; sorbents and molecularly imprinted polymers (MIPs); quantitative and qualitative analysis; chromatographic and electrophoretic techniques
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Anna Poliwoda

E-Mail Website
Guest Editor
Faculty of Chemistry, University of Opole, ul. Oleska 48, 45-052 Opole, Poland
Interests: capillary electrophoresis; mass spectroscopy; analytical procedures and determination; molecularly imprinted technology; LC-MS; CE-MS
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The supported liquid membrane (SLM) process is being applied for the selective enrichment, separation, and removal of many significant compounds and ions from various sources. This membrane-based microextraction technique is one of the most effective and inexpensive sample pretreatment methods. Given the simplicity, versatility, and availability of different formats (hollow fiber, flat sheet, etc.), SLM addresses several challenges associated with the traditional sample preparation methods. The appropriate speed, simplicity, consumed organic solvent reduction, proper analytes enrichment, sample purifying, and removing often extra sample preparation steps, make this method completely appropriate and useful in a variety of analytical areas (in clinical, environmental, pharmaceutical, and food sciences). Its combination with other extraction techniques (like solid-phase extraction, molecularly imprinted polymers (MIPs), surface-enhanced Raman spectroscopy (SERS), deep eutectic solvents, etc.), into one working system, makes it possible to increase the desired effect of highly-selective extraction and a sufficient sample clean-up. Furthermore, by coupling this technique with flow-based analysis (i.e., HPLC, CE), sample preparation and analyte detection can be automated and miniaturized.

Therefore, this Special Issue will cover the latest research trends in supported liquid membrane-based processes, and their modification and applications in many research fields. For this reason, we kindly invite you to submit original research papers, communications, and review articles discussing theoretical and/or experimental studies on the SLM membrane preparation, properties, and analytical applications.

Prof. Dr. Piotr P. Wieczorek
Prof. Dr. Anna Poliwoda
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. Membranes 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 2200 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

  • Supported liquid membranes
  • Mass transfer
  • Diffusion of gases and ions
  • Microextraction
  • Miniaturization
  • Ionic liquids
  • Enrichment
  • Sample pretreatment
  • Analytical methods
  • Complex sample matrices
  • Sorption
  • Hyphenated techniques

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Published Papers (3 papers)

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Research

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12 pages, 1453 KiB  
Article
Determination of Glyphosate and AMPA in Food Samples Using Membrane Extraction Technique for Analytes Preconcentration
by Katarzyna Gębura, Piotr P. Wieczorek and Anna Poliwoda
Membranes 2022, 12(1), 20; https://doi.org/10.3390/membranes12010020 - 24 Dec 2021
Cited by 3 | Viewed by 2689
Abstract
The method for determining glyphosate (NPG) and its metabolite AMPA (aminomethyl phosphonic acid) in solid food samples using UAE-SLM-HPLC–PDA technique was developed. Firstly, ultrasonic-assisted solvent extraction (UAE) and protein precipitation step were used for the analyte isolation. Then, the supernatant was evaporated to [...] Read more.
The method for determining glyphosate (NPG) and its metabolite AMPA (aminomethyl phosphonic acid) in solid food samples using UAE-SLM-HPLC–PDA technique was developed. Firstly, ultrasonic-assisted solvent extraction (UAE) and protein precipitation step were used for the analyte isolation. Then, the supernatant was evaporated to dryness and redissolved in distilled water (100 mL). The obtained solution was alkalized to pH 11 (with 1 M NaOH) and used directly as donor phase in SLM (supported liquid membrane) extraction. The SLM extraction was performed using 2 M NaCl (5 mL) as an acceptor phase. The flow rate of both phases (donor and acceptor) was set at 0.2 mL/min. The membrane extraction took 24 h but did not require any additional workload. Finally, the SLM extracts were analyzed using the HPLC technique with photo-diode array detector (PDA) and an application of pre-column derivatization with p-toluenesulfonyl chloride. Glyphosate residues were determined in food samples of walnuts, soybeans, barley and lentil samples. The LOD values obtained for the studied food were 0.002 μg g−1 and 0.021 μg g−1 for NPG and AMPA, respectively. Recoveries values ranged from 32% to 69% for NPG, 29% to 56% for AMPA and depended on the type of sample matrix. In the case of buckwheat and rice flour samples, the content of NPG and AMPA was below the detection level of a used analytical method. Full article
(This article belongs to the Special Issue Advances in Supported Liquid Membranes)
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13 pages, 3891 KiB  
Article
Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl−/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling
by Francisco J. Alguacil, Lorena Alcaraz, Olga R. Largo and Félix A. López
Membranes 2020, 10(12), 432; https://doi.org/10.3390/membranes10120432 - 17 Dec 2020
Cited by 1 | Viewed by 2081
Abstract
By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327H+Cl− was generated and used to investigate its performance in the transport of Au(III) from hydrochloric acid medium. The influence of the [...] Read more.
By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327H+Cl− was generated and used to investigate its performance in the transport of Au(III) from hydrochloric acid medium. The influence of the stirring speed (600–1800 min−1), ionic liquid concentration (1.25–50% v/v) in the membrane phase, and gold concentration (0.01–0.15 g/L) in the feed phase on metal transport have been investigated. An equation which included both equilibrium and kinetics parameters was derived, and the membrane diffusional resistance (Δm) and feed phase diffusional resistance (Δf) was estimated as 9.5 × 106 s/cm and 307 s/cm, respectively. At carrier concentrations in the 5–50% v/v range and gold concentrations in the 0.01–0.15 g/L range, metal transport is controlled by diffusion of metal species through the feed boundary layer, whereas at the lowest carrier concentrations, membrane diffusion is predominant. From the receiving solutions, gold can be recovered as gold nanoparticles. Full article
(This article belongs to the Special Issue Advances in Supported Liquid Membranes)
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Review

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25 pages, 1011 KiB  
Review
Application of Hollow Fibre-Liquid Phase Microextraction Technique for Isolation and Pre-Concentration of Pharmaceuticals in Water
by Lawrence Mzukisi Madikizela, Vusumzi Emmanuel Pakade, Somandla Ncube, Hlanganani Tutu and Luke Chimuka
Membranes 2020, 10(11), 311; https://doi.org/10.3390/membranes10110311 - 29 Oct 2020
Cited by 32 | Viewed by 4307
Abstract
In this article, a comprehensive review of applications of the hollow fibre-liquid phase microextraction (HF-LPME) for the isolation and pre-concentration of pharmaceuticals in water samples is presented. HF-LPME is simple, affordable, selective, and sensitive with high enrichment factors of up to 27,000-fold reported [...] Read more.
In this article, a comprehensive review of applications of the hollow fibre-liquid phase microextraction (HF-LPME) for the isolation and pre-concentration of pharmaceuticals in water samples is presented. HF-LPME is simple, affordable, selective, and sensitive with high enrichment factors of up to 27,000-fold reported for pharmaceutical analysis. Both configurations (two- and three-phase extraction systems) of HF-LPME have been applied in the extraction of pharmaceuticals from water, with the three-phase system being more prominent. When compared to most common sample preparation techniques such as solid phase extraction, HF-LPME is a greener analytical chemistry process due to reduced solvent consumption, miniaturization, and the ability to automate. However, the automation comes at an added cost related to instrumental set-up, but a reduced cost is associated with lower reagent consumption as well as shortened overall workload and time. Currently, many researchers are investigating ionic liquids and deep eutectic solvents as environmentally friendly chemicals that could lead to full classification of HF-LPME as a green analytical procedure. Full article
(This article belongs to the Special Issue Advances in Supported Liquid Membranes)
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