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Dowlatshah S, Hansen FA, Zhou C, Ramos-Payán M, Halvorsen TG, Pedersen-Bjergaard S. Electromembrane extraction of peptides based on hydrogen bond interactions. Anal Chim Acta 2023; 1275:341610. [PMID: 37524472 DOI: 10.1016/j.aca.2023.341610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 06/17/2023] [Accepted: 07/09/2023] [Indexed: 08/02/2023]
Abstract
BACKGROUND Electromembrane extraction (EME) of peptides reported in the scientific literature involve transfer of net positively charged peptides from an aqueous sample, through a liquid membrane, and into an aqueous acceptor solution, under the influence of an electrical field. The liquid membrane comprises an organic solvent, containing an ionic carrier. The purpose of the ionic carrier is to facilitate peptide solvation in the organic solvent based on ionic interactions. Unfortunately, ionic carriers increase the conductivity of the liquid membrane; the current in the system increases, the electrolysis in sample and acceptor is accelerated, and the extraction system tend to be unstable and suffers from drifting pH. RESULTS In the present work, a broad selection of organic solvents were tested as pure liquid membrane for EME of peptides, without ionic carrier. Several phosphates provided high mass transfer, and tri(pentyl) phosphate was selected since this solvent also provided high operational stability. Among 16 different peptides used as model analytes, tri(pentyl) phosphate extracted those with net charge +1 and with no more than two polar side chains. Tri(pentyl) phosphate served as a very strong hydrogen bond acceptor, while the protonated peptides were hydrogen bond donors. By such, hydrogen bonding served as the primary interactions responsible for mass transfer. Tri(pentyl) phosphate as liquid membrane, could exhaustively extract leu-enkephalin, met-enkephalin, and endomorphin from human blood plasma and detected by LC-MS/MS. Calibration curves were linear (r2 > 0.99) within a concentration range from 1 to 500 ng/mL, and a relative standard deviation within 12% was observed for precision studies. SIGNIFICANCE The current experiments are important because they indicate that small peptides of low polarity may be extracted selectively in EME based on hydrogen bond interactions, in systems not suffering from electrolysis.
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Affiliation(s)
- Samira Dowlatshah
- Department of Pharmacy, University of Oslo, P.O Box 1068 Blindern, 0316, Oslo, Norway
| | - Frederik André Hansen
- Department of Pharmacy, University of Oslo, P.O Box 1068 Blindern, 0316, Oslo, Norway
| | - Chen Zhou
- Department of Pharmacy, University of Oslo, P.O Box 1068 Blindern, 0316, Oslo, Norway; West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, 610041, China
| | - María Ramos-Payán
- Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González s/n, 41012, Seville, Spain
| | | | - Stig Pedersen-Bjergaard
- Department of Pharmacy, University of Oslo, P.O Box 1068 Blindern, 0316, Oslo, Norway; Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark.
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Eie LV, Pedersen-Bjergaard S, Hansen FA. Electromembrane extraction of polar substances - Status and perspectives. J Pharm Biomed Anal 2022; 207:114407. [PMID: 34634529 DOI: 10.1016/j.jpba.2021.114407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/20/2021] [Accepted: 09/30/2021] [Indexed: 12/15/2022]
Abstract
In this article, the scientific literature on electromembrane extraction (EME) of polar substances (log P < 2) is reviewed. EME is an extraction technique based on electrokinetic migration of analyte ions from an aqueous sample, across an organic supported liquid membrane (SLM), and into an aqueous acceptor solution. Because extraction is based on voltage-assisted partitioning, EME is fundamentally suitable for extraction of polar and ionizable substances that are challenging in many other extraction techniques. The article provides an exhaustive overview of papers on EME of polar substances. From this, different strategies to improve the mass transfer of polar substances are reviewed and critically discussed. These strategies include different SLM chemistries, modification of supporting membranes, sorbent additives, aqueous solution chemistry, and voltage/current related strategies. Finally, the future applicability of EME for polar substances is discussed. We expect EME in the coming years to be developed towards both very selective targeted analysis, as well as untargeted analysis of polar substances in biomedical applications such as metabolomics and peptidomics.
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Affiliation(s)
- Linda Vårdal Eie
- Department of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway
| | - Stig Pedersen-Bjergaard
- Department of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway; Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Frederik André Hansen
- Department of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway.
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Alidoust M, Yamini Y, Baharfar M, Seidi S, Rasouli F. Microfluidic-enabled versatile hyphenation of electromembrane extraction and thin film solid phase microextraction. Talanta 2021; 224:121864. [PMID: 33379075 DOI: 10.1016/j.talanta.2020.121864] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/01/2020] [Accepted: 11/02/2020] [Indexed: 10/23/2022]
Abstract
In the present study, a versatile combination of electromembrane extraction (EME) with thin film solid phase microextraction (TF-SPME) was introduced using a microfluidic chip device. The device consisted of two single channels on two separate layers. The upper channel was dedicated to donor phase flow pass, while the beneath channel was used as a reservoir for stagnant acceptor solution. A slide of fluorine doped tin oxide (FTO) was accommodated in the bottom of the acceptor phase channel. A thin layer of polyaniline was electrodeposited on the FTO surface to achieve the required thin film for TF-SPME. A stainless-steel wire was embedded in the donor phase channel and another wire was also attached to the FTO surface. The channels were separated by a piece of polypropylene membrane impregnated with 1-octanol and the whole chip was fixed with bolts and nuts. The driving force for the extraction was an 8 V direct current (DC) voltage applied across the supported liquid membrane (SLM). Under the influence of the electrical field, analytes immigrated from sample towards the acceptor phase and then adsorbed on the thin film of the solid phase. Finally, the analytes were desorbed by successive movement of a desorption solvent in the acceptor phase channel followed by injection of the desorption solution to HPLC-UV. The applicability of the proposed device was demonstrated by the determination of four synthetic food dyes: Amaranth, Ponceau 4R, Allura Red, and Carmoisine, as the model analytes. The effective parameters on the efficiency of the both EME and TF-SPME were investigated. Under the optimized conditions, the microchip provided low LODs (1-10 μg L-1), and a wide linear dynamic range of 10-1000 μg L-1 for all analytes. The system also offered RSD values lower than 5.5% and acceptable reusability of the thin film for multiple extractions.
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Affiliation(s)
- Mina Alidoust
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box: 14115 175, Tehran, Iran
| | - Yadollah Yamini
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box: 14115 175, Tehran, Iran.
| | - Mahroo Baharfar
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box: 14115 175, Tehran, Iran
| | - Shahram Seidi
- Department of Analytical Chemistry, Faculty of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Fatemeh Rasouli
- Department of Analytical Chemistry, Faculty of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
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4
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Electromembrane extraction of peptides and amino acids - status and perspectives. Bioanalysis 2021; 13:277-289. [PMID: 33543669 DOI: 10.4155/bio-2020-0285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
This article reviews the scientific literature on electromembrane extraction (EME) of peptides and amino acids. In EME, target analytes are extracted from aqueous sample, through a supported liquid membrane (organic) and into a microliter volume of aqueous buffer (acceptor). Experimental conditions and performance for EME of peptides and amino acids are reviewed and discussed in detail, providing readers with an overview and basic understanding of the subject. In addition, this review discuss the potential for future applications, and scientific questions that need to be addressed for EME of peptides and amino acids to be generally accepted. EME is under commercialization, and therefore we expect it will be an active area of research in the near future.
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Asadi S, Nojavan S, Behpour M, Mahdavi P. Electromembrane extraction based on agarose gel for the extraction of phenolic acids from fruit juices. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1159:122401. [PMID: 33126069 DOI: 10.1016/j.jchromb.2020.122401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/07/2020] [Accepted: 10/05/2020] [Indexed: 10/23/2022]
Abstract
Extraction of polar acidic compounds is a challenging task in electromembrane extraction. In this study, gel-electromembrane extraction was employed for the extraction of phenolic acids as the polar acidic compounds from fruit juices. For this aim, the extraction of phenolic acids from the juice samples (4 mL, pH = 6.0) was carried out across the agarose gel membrane (concentration of agarose; 3% (w/v), pH of gel; 10.0, and thickness of membrane: 3 mm) into the acceptor solution (100 μL, pH = 12.0). Also, this extraction process was conducted by applying the optimum potential (25 V) for 15 min to the extraction system. Under the optimized condition, acceptable linearity (R2 ≥ 0.993) over a concentration range of 10.0-2500 ng mL-1 was achieved. The limits of detection were between 3.0 and 15.2 ng mL-1, while the corresponding repeatabilities ranged from 5.3 to 11.4% (n = 4). The recoveries achieved for the extraction of target compounds were ranged from 26.8 to 74.4%. The proposed method was used for the extraction of phenolic acids from orange, apple and kiwi juices, and the obtained relative recoveries in the range of 78.0-104.2% and RSDs in the range of 6.3 to 11.3% indicated successful extraction of phenolic acids.
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Affiliation(s)
- Sakine Asadi
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., P.O. Box, 5 19396-4716, Evin, Tehran, Iran
| | - Saeed Nojavan
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., P.O. Box, 5 19396-4716, Evin, Tehran, Iran.
| | - Majid Behpour
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., P.O. Box, 5 19396-4716, Evin, Tehran, Iran
| | - Parisa Mahdavi
- Department of Analytical Chemistry and Pollutants, Shahid Beheshti University, G. C., P.O. Box, 5 19396-4716, Evin, Tehran, Iran
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Abstract
![]()
In
this paper, we report the first example of employing a sacrificial
electrode in the acceptor solution during electromembrane extraction
(EME). The electrode was based on a silver wire with a layer of silver
chloride electroplated onto the surface. During EME, the electrode
effectively inhibited electrolysis of water in the acceptor compartment,
by accepting the charge transfer across the SLM, which enabled the
application of 500 μA current without suffering gas formation
or pH changes from electrolysis of water. The electroplating strategy
was optimized with a design-of-experiments (DOE) methodology that
provided optimal conditions of electroplating. With an optimized electrode,
1 cm of the electrode in contact with the acceptor solution inhibited
electrolysis of water for approximately 30 min at 500 μA current
(redox capacity). Further, the redox capacity of the electrode was
found to increase through multiple uses. The advantage of the electrode
was demonstrated by extracting polar analytes at high-current conditions
in a standard EME system comprising 2-nitrophenyl octyl ether (NPOE)
as SLM and 10 mM HCl as sample/acceptor solutions. Application of
high current enabled significantly higher recoveries than could otherwise
be obtained at 100 μA. Sacrificial electrodes were also tested
in μ-EME and were found beneficial by eliminating detrimental
bubble formation. Thus, the sacrificial electrodes improved the stability
of μ-EME systems. The findings of this paper are important for
development of stable and robust systems for EME operated at high
voltage/current and for EME performed in narrow channels/tubing where
bubble formation is critical.
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Affiliation(s)
- Frederik A Hansen
- Department of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway
| | - Henrik Jensen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Stig Pedersen-Bjergaard
- Department of Pharmacy, University of Oslo, P.O. Box 1068 Blindern, 0316 Oslo, Norway.,Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
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Yeh CS, Cheng PS, Chang SY. Solvent-free electromembrane extraction: A new concept in electro-driven extraction. Talanta 2019; 199:296-302. [DOI: 10.1016/j.talanta.2019.02.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 01/09/2023]
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Hosseiny Davarani SS, Pourahadi A, Ghasemzadeh P. Quantification of controlled release leuprolide and triptorelin in rabbit plasma using electromembrane extraction coupled with HPLC–UV. Electrophoresis 2019; 40:1074-1081. [DOI: 10.1002/elps.201800481] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/27/2018] [Accepted: 01/02/2019] [Indexed: 12/13/2022]
Affiliation(s)
| | - Ahmad Pourahadi
- Faculty of ChemistryShahid Beheshti University Evin Tehran Iran
| | - Peivand Ghasemzadeh
- Faculty of PharmacyTehran Medical SciencesIslamic Azad University Tehran Iran
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Havlikova M, Cabala R, Pacakova V, Bosakova Z. Critical evaluation of microextraction pretreatment techniques-Part 2: Membrane-supported and homogenous phase based techniques. J Sep Sci 2018; 42:303-318. [DOI: 10.1002/jssc.201800903] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Martina Havlikova
- Department of Analytical Chemistry; Faculty of Science; Charles University; Prague Czech Republic
| | - Radomir Cabala
- Department of Analytical Chemistry; Faculty of Science; Charles University; Prague Czech Republic
- Toxicology Department; Institute of Forensic Medicine and Toxicology; General University Hospital in Prague and 1st Faculty of Medicine of Charles University; Prague Czech Republic
| | - Vera Pacakova
- Department of Analytical Chemistry; Faculty of Science; Charles University; Prague Czech Republic
| | - Zuzana Bosakova
- Department of Analytical Chemistry; Faculty of Science; Charles University; Prague Czech Republic
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Yttrium (III) Recovery with D2EHPA in Pseudo-Emulsion Hollow Fiber Strip Dispersion System. Sci Rep 2018; 8:7627. [PMID: 29769599 PMCID: PMC5955940 DOI: 10.1038/s41598-018-25771-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 04/27/2018] [Indexed: 11/09/2022] Open
Abstract
Yttrium (Y) is an essential lanthanide rare earth element and can be effectively extracted and purified using a hollow fiber supported liquid membrane (HFSLM) system. However, the stability of HFSLM system is a significant challenge. Pseudoemulsion-hollow fiber strip dispersion (PEHFSD) system, providing excellent stability, is attracting research attention. In this work, the recovery of Y(III) by PEHFSD system using di(2-ethylhexyl)phosphoric acid (D2EHPA) as a carrier was investigated. The effects of several operating parameters, including the initial concentration of Y(III) in the feed phase, the flow rate of feed, the stirring speed and the volumetric ratio of feed to strip on Y(III) separation were studied. The Y(III) transport was analyzed on the concentration ratio of Y(III) ions, percent extraction, percent stripping and overall mass transfer coefficient (Kp). The PEHFSD system outperformed HFSLM system regarding separation performance and stability. Kp of HFSLM system decreased after the second run, but Kp of PEHFSD system remained constant even at the fifth run. The dispersed droplets in the strip dispersion phase in the PEHFSD system enhanced separation performance and stability of the membrane module.
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Flow Injection Analysis with Direct UV Detection Following Electric Field Driven Membrane Extraction. Molecules 2018; 23:molecules23051000. [PMID: 29695126 PMCID: PMC6100346 DOI: 10.3390/molecules23051000] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 04/17/2018] [Accepted: 04/20/2018] [Indexed: 12/21/2022] Open
Abstract
A method for on-line matrix elimination to enable selective quantification of ultraviolet absorbing analytes by a flow-injection analysis procedure is described. Selectivity is achieved by electric field driven extraction across a polymer inclusion membrane. The method was demonstrated on the example of the determination of naproxen from spiked human urine. Membranes of 10 μm thickness were employed which consisted of 7.5 mg cellulose triacetate as base polymer, 5 mg of o-nitrophenyl octyl ether as plasticizer and 7.5 mg of Aliquat 336 as cationic carrier. Ten μL of sample was introduced into a continuous stream of background solution consisting of 100 µM aqueous NaClO4 with a flow rate of 2 μL/min while applying a voltage of 150 V to the extraction cell. The target ion was electrokinetically transported across the membrane and enriched in 1.5 μL of a stagnant acceptor solution. This was subsequently pumped past a flow-through UV detector for quantification. The method showed a linear range from 5 to 200 µM with a correlation coefficient of 0.9978 and a reproducibility of typically 7% (n = 8). The detection limit of the method for naproxen was 2 µM.
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Šlampová A, Kubáň P. Direct Analysis of Free Aqueous and Organic Operational Solutions as a Tool for Understanding Fundamental Principles of Electromembrane Extraction. Anal Chem 2017; 89:12960-12967. [DOI: 10.1021/acs.analchem.7b03829] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrea Šlampová
- Institute of Analytical Chemistry of the Czech Academy of Sciences v.v.i., Veveří 97, CZ-60200 Brno, Czech Republic
| | - Pavel Kubáň
- Institute of Analytical Chemistry of the Czech Academy of Sciences v.v.i., Veveří 97, CZ-60200 Brno, Czech Republic
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Mamat NA, See HH. Simultaneous electromembrane extraction of cationic and anionic herbicides across hollow polymer inclusion membranes with a bubbleless electrode. J Chromatogr A 2017; 1504:9-16. [PMID: 28499598 DOI: 10.1016/j.chroma.2017.05.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 04/02/2017] [Accepted: 05/02/2017] [Indexed: 12/26/2022]
Abstract
A new electric-field driven extraction approach based on the integration of a bubbleless electrode into the electromembrane extraction (EME) across hollow polymer inclusion membranes (HPIMs) was demonstrated for the first time. The bubbleless electrode was prepared based on an in-situ synthesised polyacrylamide within a fused silica capillary. The electrode functions as a salt bridge, which conducts the electrical current between the acceptor phase in the lumen of the HPIM and the acceptor solution in the reservoir connected to a high voltage supply through a platinum electrode. Two types of HPIMs were employed, which consisted of desired proportions of cellulose acetate as base polymer, tris(2-ethylhexyl)phosphate as plasticizer, and di-(2-ethylhexyl)phosphoric acid as anionic carrier or Aliquat 336 as cationic carrier, respectively. The EME strategy was evaluated for the simultaneous determination of cationic quaternary ammonium and anionic chlorophenoxy acetic acid herbicides present in the river water, respectively. The analysis was carried out using capillary electrophoresis coupled with UV and contactless conductivity detection. Under the optimised conditions, enrichment factors in the range of 152-185-fold were obtained from 4mL of river water sample with a 20min extraction time and an applied voltage of 3000V. The proposed method provided good linearity with correlation coefficients ranging from 0.9982 to 0.9997 over a concentration range of 1-1000μg/L. The detection limits of the method for the herbicides were in the range of 0.3-0.4μg/L, with relative standard deviations of between 4.8% and 8.5%. The relative recoveries obtained when analysing the spiked river water ranged from 99.1% to 100%. A comparison was also made between the newly developed approach with the conventional EME setup by placing the platinum electrode directly in the lumen of the HPIMs.
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Affiliation(s)
- Nor Akma Mamat
- Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia; Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia
| | - Hong Heng See
- Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia; Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia.
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Drouin N, Rudaz S, Schappler J. Dynamic-Electromembrane Extraction: A Technical Development for the Extraction of Neuropeptides. Anal Chem 2016; 88:5308-15. [DOI: 10.1021/acs.analchem.6b00559] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicolas Drouin
- School of Pharmaceutical
Sciences, University of Geneva, University of Lausanne, Boulevard
d’Yvoy 20, 1211 Geneva 4, Switzerland
| | - Serge Rudaz
- School of Pharmaceutical
Sciences, University of Geneva, University of Lausanne, Boulevard
d’Yvoy 20, 1211 Geneva 4, Switzerland
| | - Julie Schappler
- School of Pharmaceutical
Sciences, University of Geneva, University of Lausanne, Boulevard
d’Yvoy 20, 1211 Geneva 4, Switzerland
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Nojavan S, Bidarmanesh T, Mohammadi A, Yaripour S. Electromembrane extraction of gonadotropin-releasing hormone agonists from plasma and wastewater samples. Electrophoresis 2016; 37:826-33. [DOI: 10.1002/elps.201500555] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/08/2016] [Accepted: 01/11/2016] [Indexed: 01/25/2023]
Affiliation(s)
- Saeed Nojavan
- Faculty of Chemistry; Shahid Beheshti University; Evin Tehran Iran
| | - Tina Bidarmanesh
- Faculty of Chemistry; Shahid Beheshti University; Evin Tehran Iran
| | - Ali Mohammadi
- Pharmaceutical Quality Assurance Research Center, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
- Department of Drug and Food Control, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
| | - Saeid Yaripour
- Department of Drug and Food Control, Faculty of Pharmacy; Tehran University of Medical Sciences; Tehran Iran
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16
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Nojavan S, Tahmasebi Z, Hosseiny Davarani SS. Effect of type of stirring on hollow fiber liquid phase microextraction and electromembrane extraction of basic drugs: speed up extraction time and enhancement of extraction efficiency. RSC Adv 2016. [DOI: 10.1039/c6ra18798f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In microextraction procedures, the stirring of the donor solution is crucial to speed up the extraction.
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Affiliation(s)
- Saeed Nojavan
- Faculty of Chemistry
- Shahid Beheshti University
- Evin
- Iran
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17
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Nojavan S, Asadi S. Electromembrane extraction using two separate cells: A new design for simultaneous extraction of acidic and basic compounds. Electrophoresis 2015; 37:587-94. [DOI: 10.1002/elps.201500455] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 11/13/2015] [Accepted: 11/14/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Saeed Nojavan
- Faculty of Chemistry; ShahidBeheshti University; Tehran Iran
| | - Sakine Asadi
- Faculty of Chemistry; ShahidBeheshti University; Tehran Iran
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Huang C, Seip KF, Gjelstad A, Pedersen-Bjergaard S. Electromembrane extraction for pharmaceutical and biomedical analysis – Quo vadis. J Pharm Biomed Anal 2015; 113:97-107. [DOI: 10.1016/j.jpba.2015.01.038] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/15/2015] [Accepted: 01/18/2015] [Indexed: 01/26/2023]
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Development and evaluation of electromembrane extraction across a hollow polymer inclusion membrane. J Chromatogr A 2015; 1406:34-9. [DOI: 10.1016/j.chroma.2015.06.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Revised: 06/09/2015] [Accepted: 06/09/2015] [Indexed: 11/20/2022]
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Selective electromembrane extraction based on isoelectric point: Fundamental studies with angiotensin II antipeptide as model analyte. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.02.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Abstract
Modern requirements in the field of bioanalysis often involve miniaturized, high-throughput sample preparation techniques that consume low amounts of both sample and potentially hazardous organic solvents. Electromembrane extraction is one technique that meets several of these requirements. In this principle analytes are selectively extracted from a biological matrix, through a supported liquid membrane and into an aqueous acceptor solution. The whole extraction process is facilitated by an electric field across the supported liquid membrane, which greatly reduces the extraction time. This review will give a thorough overview of recent advances in bioanalytical applications involving electromembrane extraction, and discuss both possibilities and challenges of the technique in a bioanalytical setting.
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Hasheminasab KS, Fakhari AR. Application of nonionic surfactant as a new method for the enhancement of electromembrane extraction performance for determination of basic drugs in biological samples. J Chromatogr A 2015; 1378:1-7. [DOI: 10.1016/j.chroma.2014.11.061] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Revised: 11/24/2014] [Accepted: 11/24/2014] [Indexed: 01/21/2023]
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23
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Exhaustive extraction of peptides by electromembrane extraction. Anal Chim Acta 2015; 853:328-334. [DOI: 10.1016/j.aca.2014.10.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/05/2014] [Accepted: 10/11/2014] [Indexed: 11/21/2022]
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24
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See HH, Hauser PC. Automated Electric-Field-Driven Membrane Extraction System Coupled to Liquid Chromatography–Mass Spectrometry. Anal Chem 2014; 86:8665-70. [DOI: 10.1021/ac5015589] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hong Heng See
- Department
of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
- Ibnu
Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia
| | - Peter C. Hauser
- Department
of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland
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25
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Gjelstad A, Pedersen-Bjergaard S. Electromembrane extraction--three-phase electrophoresis for future preparative applications. Electrophoresis 2014; 35:2421-8. [PMID: 24810105 DOI: 10.1002/elps.201400127] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 04/25/2014] [Accepted: 04/25/2014] [Indexed: 11/07/2022]
Abstract
The purpose of this article is to discuss the principle and the future potential for electromembrane extraction (EME). EME was presented in 2006 as a totally new sample preparation technique for ionized target analytes, based on electrokinetic migration across a supported liquid membrane under the influence of an external electrical field. The principle of EME is presented, and typical performance data for EME are discussed. Most work with EME up to date has been performed with low-molecular weight pharmaceutical substances as model analytes, but the principles of EME should be developed in other directions in the future to fully explore the potential. Recent research in new directions is critically reviewed, with focus on extraction of different types of chemical and biochemical substances, new separation possibilities, new approaches, and challenges related to mass transfer and background current. The intention of this critical review is to give a flavor of EME and to stimulate into more research in the area of EME. Unlike other review articles, the current one is less comprehensive, but put more emphasis on new directions for EME.
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Affiliation(s)
- Astrid Gjelstad
- School of Pharmacy, University of Oslo, Blindern, Oslo, Norway
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26
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Šlampová A, Kubáň P, Boček P. Effects of selected operational parameters on efficacy and selectivity of electromembrane extraction. Chlorophenols as model analytes. Electrophoresis 2014; 35:2429-37. [DOI: 10.1002/elps.201400096] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/15/2014] [Accepted: 04/15/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Andrea Šlampová
- Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Pavel Kubáň
- Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic; Brno Czech Republic
| | - Petr Boček
- Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic; Brno Czech Republic
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27
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Spietelun A, Marcinkowski Ł, de la Guardia M, Namieśnik J. Green aspects, developments and perspectives of liquid phase microextraction techniques. Talanta 2014; 119:34-45. [DOI: 10.1016/j.talanta.2013.10.050] [Citation(s) in RCA: 250] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 10/21/2013] [Accepted: 10/22/2013] [Indexed: 02/05/2023]
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28
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Huang C, Eibak LEE, Gjelstad A, Shen X, Trones R, Jensen H, Pedersen-Bjergaard S. Development of a flat membrane based device for electromembrane extraction: A new approach for exhaustive extraction of basic drugs from human plasma. J Chromatogr A 2014; 1326:7-12. [DOI: 10.1016/j.chroma.2013.12.028] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 12/06/2013] [Accepted: 12/09/2013] [Indexed: 10/25/2022]
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29
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Yamini Y, Seidi S, Rezazadeh M. Electrical field-induced extraction and separation techniques: promising trends in analytical chemistry--a review. Anal Chim Acta 2013; 814:1-22. [PMID: 24528839 DOI: 10.1016/j.aca.2013.12.019] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 12/07/2013] [Accepted: 12/16/2013] [Indexed: 10/25/2022]
Abstract
Sample preparation is an important issue in analytical chemistry, and is often a bottleneck in chemical analysis. So, the major incentive for the recent research has been to attain faster, simpler, less expensive, and more environmentally friendly sample preparation methods. The use of auxiliary energies, such as heat, ultrasound, and microwave, is one of the strategies that have been employed in sample preparation to reach the above purposes. Application of electrical driving force is the current state-of-the-art, which presents new possibilities for simplifying and shortening the sample preparation process as well as enhancing its selectivity. The electrical driving force has scarcely been utilized in comparison with other auxiliary energies. In this review, the different roles of electrical driving force (as a powerful auxiliary energy) in various extraction techniques, including liquid-, solid-, and membrane-based methods, have been taken into consideration. Also, the references have been made available, relevant to the developments in separation techniques and Lab-on-a-Chip (LOC) systems. All aspects of electrical driving force in extraction and separation methods are too specific to be treated in this contribution. However, the main aim of this review is to provide a brief knowledge about the different fields of analytical chemistry, with an emphasis on the latest efforts put into the electrically assisted membrane-based sample preparation systems. The advantages and disadvantages of these approaches as well as the new achievements in these areas have been discussed, which might be helpful for further progress in the future.
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Affiliation(s)
- Yadollah Yamini
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.
| | - Shahram Seidi
- Department of Analytical Chemistry, Faculty of Chemistry, K.N. Toosi University of Technology, Tehran, Iran
| | - Maryam Rezazadeh
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
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30
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Seip KF, Gjelstad A, Pedersen-Bjergaard S. Electromembrane extraction from aqueous samples containing polar organic solvents. J Chromatogr A 2013; 1308:37-44. [DOI: 10.1016/j.chroma.2013.07.105] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 06/18/2013] [Accepted: 07/31/2013] [Indexed: 11/28/2022]
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31
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See HH, Stratz S, Hauser PC. Electro-driven extraction across a polymer inclusion membrane in a flow-through cell. J Chromatogr A 2013; 1300:79-84. [PMID: 23394749 DOI: 10.1016/j.chroma.2013.01.062] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 01/08/2013] [Accepted: 01/10/2013] [Indexed: 11/29/2022]
Abstract
A flow-through arrangement for electrodriven extraction across a polymer inclusion membrane was developed. Sample introduction into the donor chamber was continuous, while the acceptor solution was stagnant. By adjustment of the total volume of the donor solution pumped through the cell the best compromise between enrichment factor and extraction time can be set. The enriched extract was analyzed by capillary electrophoresis with contactless conductivity detection. Membranes of 20μm thickness were employed which consisted of 60% cellulose triacetate as base polymer, 20% o-nitrophenyl octyl ether as plasticizer, and 20% Aliquat 336. By passing through 10mL of sample at a flow rate of 1mL/min the model analytes glyphosate (a common herbicide) and its major metabolite aminomethylphosphonic acid could be transported from the aqueous donor solution to the aqueous acceptor solution with efficiencies >87% in 10min at an applied voltage of 1500V. Enrichment factors of 87 and 95 and limits of detection down to 43 and 64pg/mL were obtained for glyphosate and aminomethylphosphonic acid, respectively. The intra- and interday reproducibilities for the extraction of the two compounds from spiked river water were about 6 and 7% respectively when new membranes were used for each experiment. For consecutive extractions of batches of river water with a single piece of membrane a deterioration of recovery by about 16% (after 20 runs) was noted, an effect not observed with purely aqueous standards.
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Affiliation(s)
- Hong Heng See
- Department of Chemistry, University of Basel, Spitalstrasse 51, 4056 Basel, Switzerland.
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32
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Nano-electromembrane extraction. Anal Chim Acta 2013; 785:60-6. [DOI: 10.1016/j.aca.2013.04.055] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 04/25/2013] [Accepted: 04/28/2013] [Indexed: 11/23/2022]
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33
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Krishna Marothu V, Gorrepati M, Vusa R. Electromembrane extraction--a novel extraction technique for pharmaceutical, chemical, clinical and environmental analysis. J Chromatogr Sci 2013; 51:619-31. [PMID: 23595685 DOI: 10.1093/chromsci/bmt041] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Electromembrane extraction (EME) is a novel sample preparation technique in pharmaceutical, chemical, clinical and environmental analysis. This technique uses electromigration across artificial liquid membranes for selective extraction of analytes and sample enrichment from complex matrices. This review focuses on the setup, general procedure and parameters affecting the extraction efficiency of EME. An overview of innovations in EME (on-chip EME, low voltage EME, drop-to-drop EME, pulsed EME and EME followed by low-density solvent based ultrasound-assisted emulsification microextraction) is also presented in this article and attention is focused on the use of EME for pharmaceutical, chemical, clinical and environmental analysis.
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Affiliation(s)
- Vamsi Krishna Marothu
- Alliance Institute of Advanced Pharmaceutical and Health Sciences, Ameerpet, Hyderabad-500038, Andhra Pradesh, India.
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34
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Seip KF, Jensen H, Sønsteby MH, Gjelstad A, Pedersen-Bjergaard S. Electromembrane extraction: Distribution or electrophoresis? Electrophoresis 2013; 34:792-9. [DOI: 10.1002/elps.201200587] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 12/06/2012] [Accepted: 12/07/2012] [Indexed: 11/06/2022]
Affiliation(s)
| | - Henrik Jensen
- Department of Pharmacy, Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen; Denmark
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35
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The potential application of electromembrane extraction for the analysis of peptides in biological fluids. Bioanalysis 2012; 4:1971-3. [DOI: 10.4155/bio.12.163] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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36
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Domínguez NC, Gjelstad A, Nadal AM, Jensen H, Petersen NJ, Hansen SH, Rasmussen KE, Pedersen-Bjergaard S. Selective electromembrane extraction at low voltages based on analyte polarity and charge. J Chromatogr A 2012; 1248:48-54. [DOI: 10.1016/j.chroma.2012.05.092] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 04/30/2012] [Accepted: 05/26/2012] [Indexed: 11/26/2022]
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37
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Bello-López MÁ, Ramos-Payán M, Ocaña-González JA, Fernández-Torres R, Callejón-Mochón M. Analytical Applications of Hollow Fiber Liquid Phase Microextraction (HF-LPME): A Review. ANAL LETT 2012. [DOI: 10.1080/00032719.2012.655676] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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On-line coupling of a clean-up device with supported liquid membrane to capillary electrophoresis for direct injection and analysis of serum and plasma samples. J Chromatogr A 2012; 1234:2-8. [DOI: 10.1016/j.chroma.2011.10.046] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 10/13/2011] [Accepted: 10/17/2011] [Indexed: 11/19/2022]
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39
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Jamt REG, Gjelstad A, Eibak LEE, Øiestad EL, Christophersen AS, Rasmussen KE, Pedersen-Bjergaard S. Electromembrane extraction of stimulating drugs from undiluted whole blood. J Chromatogr A 2012; 1232:27-36. [DOI: 10.1016/j.chroma.2011.08.058] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 08/11/2011] [Accepted: 08/12/2011] [Indexed: 11/16/2022]
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40
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Fast, selective, and sensitive analysis of low-abundance peptides in human plasma by electromembrane extraction. Anal Chim Acta 2012; 716:16-23. [DOI: 10.1016/j.aca.2011.02.058] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 02/23/2011] [Accepted: 02/27/2011] [Indexed: 11/22/2022]
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41
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Eibak LEE, Gjelstad A, Rasmussen KE, Pedersen-Bjergaard S. Exhaustive electromembrane extraction of some basic drugs from human plasma followed by liquid chromatography–mass spectrometry. J Pharm Biomed Anal 2012; 57:33-8. [DOI: 10.1016/j.jpba.2011.08.026] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 08/04/2011] [Accepted: 08/13/2011] [Indexed: 11/25/2022]
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42
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Kašička V. Recent developments in CE and CEC of peptides (2009-2011). Electrophoresis 2011; 33:48-73. [DOI: 10.1002/elps.201100419] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 09/19/2011] [Accepted: 09/20/2011] [Indexed: 12/12/2022]
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43
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Seip KF, Stigsson J, Gjelstad A, Balchen M, Pedersen-Bjergaard S. Electromembrane extraction of peptides - Fundamental studies on the supported liquid membrane. J Sep Sci 2011; 34:3410-7. [DOI: 10.1002/jssc.201100558] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Revised: 08/08/2011] [Accepted: 09/09/2011] [Indexed: 11/08/2022]
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44
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Strieglerová L, Kubáň P, Boček P. Electromembrane extraction of amino acids from body fluids followed by capillary electrophoresis with capacitively coupled contactless conductivity detection. J Chromatogr A 2011; 1218:6248-55. [DOI: 10.1016/j.chroma.2011.07.011] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 06/28/2011] [Accepted: 07/01/2011] [Indexed: 10/18/2022]
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45
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Strieglerová L, Kubáň P, Boček P. Rapid and simple pretreatment of human body fluids using electromembrane extraction across supported liquid membrane for capillary electrophoretic determination of lithium. Electrophoresis 2011; 32:1182-9. [DOI: 10.1002/elps.201000620] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/03/2011] [Accepted: 01/12/2011] [Indexed: 11/10/2022]
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46
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Electromembrane extraction: a new technique for accelerating bioanalytical sample preparation. Bioanalysis 2011; 3:787-97. [DOI: 10.4155/bio.11.13] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The recent societal requirements to explore more environmentaly friendly solutions in the field of sample preparation have gained increasing focus during recent years. A reduction in the consumption of hazardous organic solvent owing to environmental and cost perspectives, small amounts of sample available and time reduction, have been major incentives for scientists to miniaturize existing sample preparation methods. Some of these challenges were addressed by the introduction of electromembrane extraction (EME), a totally new extraction principle where a potential difference is applied across a thin organic membrane immobilized in the pores in the wall of a porous polypropylene membrane. The potential difference is utilized to extract charged analytes of interest from the sample, across the organic membrane, and into an aqueous acceptor solution present inside the lumen of the hollow fiber. This article focuses on the potential of EME in bioanalysis, including discussions of EME performance.
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47
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PETERSEN NJ, RASMUSSEN KE, PEDERSEN-BJERGAARD S, GJELSTAD A. Electromembrane Extraction from Biological Fluids. ANAL SCI 2011; 27:965-72. [DOI: 10.2116/analsci.27.965] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Nickolaj Jacob PETERSEN
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen
| | | | - Stig PEDERSEN-BJERGAARD
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo
| | - Astrid GJELSTAD
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo
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48
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Balchen M, Hatterud AG, Reubsaet L, Pedersen-Bjergaard S. Fundamental studies on the electrokinetic transfer of net cationic peptides across supported liquid membranes. J Sep Sci 2010; 34:186-95. [DOI: 10.1002/jssc.201000703] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 11/05/2010] [Accepted: 11/05/2010] [Indexed: 11/10/2022]
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49
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Kinetic electro membrane extraction under stagnant conditions—Fast isolation of drugs from untreated human plasma. J Chromatogr A 2010; 1217:5050-6. [DOI: 10.1016/j.chroma.2010.06.018] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/28/2010] [Accepted: 06/04/2010] [Indexed: 11/21/2022]
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