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Stergiopoulos C, Tsakanika LA, Ochsenkühn-Petropoulou M, Kakoulidou AT, Tsopelas F. APPLICATION OF MICELLAR LIQUID CHROMATOGRAPHY TO MODEL ECOTOXICITY OF PESTICIDES. COMPARISON WITH IMMOBILIZED ARTIFICIAL MEMBRANE CHROMATOGRAPHY AND N-OCTANOL-WATER PARTITIONING. J Chromatogr A 2023; 1696:463951. [PMID: 37054635 DOI: 10.1016/j.chroma.2023.463951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/22/2023] [Accepted: 03/25/2023] [Indexed: 03/30/2023]
Abstract
The potential of Micellar Liquid Chromatography (MLC) to model ecotoxicological endpoints for a series of pesticides was investigated. To exploit the flexibility in MLC conditions, different surfactants were employed and retention mechanism was tracked and compared to Immobilized Artificial Membrane (IAM) chromatographic retention and n-octanol- water partitioning, logP. Neutral polyoxyethylene (23) lauryl ether (Brij-35), anionic sodium dodecyl sulfate (SDS) and cationic cetyltrimethylammonium bromide (CTAB) were used in presence of PBS at pH=7.40 and acetonitrile as organic modifier when necessary. Similarities/ dissimilarities between MLC retention and IAM or logP were investigated by Principal Component Analysis (PCA) and Liner Solvation Energy Relationships (LSER). LSER revealed that hydrogen bonding acidity is the most important factor for differentiation between MLC and IAM or logP. The impact of hydrogen bonding is exemplified in the relationships of MLC retention factors with IAM or logP, which necessitate the inclusion of a relevant descriptor. PCA further revealed that MLC retention factors are clustered together with IAM indices and logP within a broader ellipse formed by ecotoxicological endpoints, involving LC50/ EC50 values of six aquatic organisms namely Rainbow Trout, Fathead Minnow, Bluegill Sunfish, Sheepshead Minnow, Eastern Oyster and Water Flea as well as LD50 values of Honey Bee, thus justifying their use to construct relevant models. Satisfactory specific models for individual organisms, as well as general fish models, were obtained, in most cases, upon combination of MLC retention factors with Molecular Weight (MW) or/ and hydrogen bond parameters. All models were evaluated and compared to previously reported IAM and logP based models using an external validation data set. Predictions with Brij-35 and SDS based models were comparable, although slightly inferior than those obtained with IAM, while they were in all cases better than those obtained with logP. CTAB led to a satisfactory prediction model for Honey Bee, but it was found less suitable for aquatic organisms.
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Affiliation(s)
- Chrysanthos Stergiopoulos
- Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering, National Technical University of Athens, Iroon Polytechniou 9, Athens 157 80, Greece
| | - Lamprini-Areti Tsakanika
- Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering, National Technical University of Athens, Iroon Polytechniou 9, Athens 157 80, Greece
| | - Maria Ochsenkühn-Petropoulou
- Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering, National Technical University of Athens, Iroon Polytechniou 9, Athens 157 80, Greece
| | - Anna Tsantili- Kakoulidou
- Department of Pharmaceutical Chemistry, School of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 157 71, Greece
| | - Fotios Tsopelas
- Laboratory of Inorganic and Analytical Chemistry, School of Chemical Engineering, National Technical University of Athens, Iroon Polytechniou 9, Athens 157 80, Greece.
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Patyra E, Kwiatek K. Analytical capabilities of micellar liquid chromatography and application to residue and contaminant analysis: A review. J Sep Sci 2021; 44:2206-2220. [PMID: 33811781 DOI: 10.1002/jssc.202001261] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 12/11/2022]
Abstract
Green chemistry is the use of chemistry to reduce or eliminate the use of generation of feedstocks, products, by-products, solvents, reagents, etc. that are hazardous to human health or the environment. One of the branches of green chemistry is micellar liquid chromatography. Micellar liquid chromatography is a reversed-phase liquid chromatographic mode with mobile phases containing a surfactant above its critical micellar concentration. The applications of micellar liquid chromatography for the determination of numerous compounds in pharmaceutical formulation, biological samples, food, environmental samples, and feeds have been growing rapidly. Micellar liquid chromatography technique has several advantages over other chromatographic techniques. Its main advantage is the small amount of organic modifiers used such as acetonitrile and methanol and the safety and recyclability of the mobile phase. In our work, we discuss the development of "green chemistry" and present what micellar liquid chromatography is. This article presents application methods with the use of micellar liquid chromatography for analysis on antibacterial substances, melamine, biogenic amines, plant protection products, flavonoids, as well as peptides in biological matrices such as milk, eggs, tissues, honey, and feed.
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Affiliation(s)
- Ewelina Patyra
- Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
| | - Krzysztof Kwiatek
- Department of Hygiene of Animal Feedingstuffs, National Veterinary Research Institute, Pulawy, Poland
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Lindemann M, Moldovan RP, Hinz S, Deuther-Conrad W, Gündel D, Dukic-Stefanovic S, Toussaint M, Teodoro R, Juhl C, Steinbach J, Brust P, Müller CE, Wenzel B. Development of a Radiofluorinated Adenosine A 2B Receptor Antagonist as Potential Ligand for PET Imaging. Int J Mol Sci 2020; 21:ijms21093197. [PMID: 32366046 PMCID: PMC7246765 DOI: 10.3390/ijms21093197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/28/2020] [Accepted: 04/28/2020] [Indexed: 01/22/2023] Open
Abstract
The adenosine A2B receptor has been proposed as a novel therapeutic target in cancer, as its expression is drastically elevated in several tumors and cancer cells. Noninvasive molecular imaging via positron emission tomography (PET) would allow the in vivo quantification of this receptor in pathological processes and most likely enable the identification and clinical monitoring of respective cancer therapies. On the basis of a bicyclic pyridopyrimidine-2,4-dione core structure, the new adenosine A2B receptor ligand 9 was synthesized, containing a 2-fluoropyridine moiety suitable for labeling with the short-lived PET radionuclide fluorine-18. Compound 9 showed a high binding affinity for the human A2B receptor (Ki(A2B) = 2.51 nM), along with high selectivities versus the A1, A2A, and A3 receptor subtypes. Therefore, it was radiofluorinated via nucleophilic aromatic substitution of the corresponding nitro precursor using [18F]F-/K2.2.2./K2CO3 in DMSO at 120 °C. Metabolic studies of [18F]9 in mice revealed about 60% of radiotracer intact in plasma at 30 minutes p.i. A preliminary PET study in healthy mice showed an overall biodistribution of [18F]9, corresponding to the known ubiquitous but low expression of the A2B receptor. Consequently, [18F]9 represents a novel PET radiotracer with high affinity and selectivity toward the adenosine A2B receptor and a suitable in vivo profile. Subsequent studies are envisaged to investigate the applicability of [18F]9 to detect alterations in the receptor density in certain cancer-related disease models.
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Affiliation(s)
- Marcel Lindemann
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Rareş-Petru Moldovan
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Sonja Hinz
- Pharma Center Bonn, Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, 53121 Bonn, Germany; (S.H.); (C.E.M.)
| | - Winnie Deuther-Conrad
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Daniel Gündel
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Sladjana Dukic-Stefanovic
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
- ROTOP Pharmaka GmbH, 01328 Dresden, Germany;
| | - Magali Toussaint
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Rodrigo Teodoro
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | | | - Jörg Steinbach
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Peter Brust
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
| | - Christa E. Müller
- Pharma Center Bonn, Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, 53121 Bonn, Germany; (S.H.); (C.E.M.)
| | - Barbara Wenzel
- Department of Neuroradiopharmaceuticals, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, 04318 Leipzig, Germany; (M.L.); (R.-P.M.); (W.D.-C.); (D.G.); (S.D.-S.); (M.T.); (R.T.); (J.S.); (P.B.)
- Correspondence: ; Tel.: +49-341-2341794637
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Mohamed FA, Khashaba PY, Shahin RY, El-Wekil MM. Determination of donepezil in spiked rabbit plasma by high-performance liquid chromatography with fluorescence detection. ROYAL SOCIETY OPEN SCIENCE 2019; 6:181476. [PMID: 30800388 PMCID: PMC6366186 DOI: 10.1098/rsos.181476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 11/21/2018] [Indexed: 06/09/2023]
Abstract
The aim of this paper is to develop sensitive, accurate, reproducible and robust RP-HPLC with fluorescence detection for estimation of donepezil (DZ) in rabbit plasma using silodosin as the internal standard (IS). The prepared samples were quantified on reversed phase column Luna C18(2) (150 × 4.6 mm i.d., 5 µm particle size) operated at room temperature using the mobile phase consisting of methanol: 0.1% acetic acid (50 : 50, v/v) at a flow rate of 1 ml min-1. The method was fully validated according to bioanalytical validation guidelines of FDA in terms of system suitability, selectivity, sensitivity, precision and stability. It was found that the increase in peak areas followed the increase of DZ concentration in the range of 2.56-200.00 ng ml-1 with LOD of 0.85 ng ml-1. The method was successfully applied for the determination of DZ in rabbit plasma using manual shaking dispersive liquid-liquid microextraction.
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Affiliation(s)
- Fardous A. Mohamed
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Pakinaz Y. Khashaba
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Deraya University, El-Minya, Egypt
| | | | - Mohamed M. El-Wekil
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
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Cao X, Hogan A, Moore E. Rapid Separation of Organophosphate Pesticides using Micellar Electrokinetic Chromatography and Short‐end Injection,. J Forensic Sci 2018; 64:1213-1220. [DOI: 10.1111/1556-4029.13963] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/01/2018] [Accepted: 11/02/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Xi Cao
- Sensing & Separation Group School of Chemistry University College Cork College Road Cork, Ireland T12 K8AF
- Life Science Interface Group Tyndall National Institute Lee Maltings Complex Dyke Parade, Cork Ireland, T12 R5CP
| | - Anna Hogan
- Sensing & Separation Group School of Chemistry University College Cork College Road Cork, Ireland T12 K8AF
- Life Science Interface Group Tyndall National Institute Lee Maltings Complex Dyke Parade, Cork Ireland, T12 R5CP
| | - Eric Moore
- Sensing & Separation Group School of Chemistry University College Cork College Road Cork, Ireland T12 K8AF
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Peris-García E, Pankajkumar-Patel N, Ruiz-Angel MJ, Carda-Broch S, García-Alvarez-Coque MC. Oil-In-Water Microemulsion Liquid Chromatography. SEPARATION AND PURIFICATION REVIEWS 2018. [DOI: 10.1080/15422119.2018.1524386] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ester Peris-García
- Department of Analytical Chemistry, University of Valencia, Dr. Moliner 50, 46100 Burjassot Spain
| | - Nikita Pankajkumar-Patel
- Department of Analytical Chemistry, University of Valencia, Dr. Moliner 50, 46100 Burjassot Spain
| | - María José Ruiz-Angel
- Department of Analytical Chemistry, University of Valencia, Dr. Moliner 50, 46100 Burjassot Spain
| | - Samuel Carda-Broch
- Departament de Química Física i Analítica, Universitat Jaume I, Av. Sos Baynat s/n, Castelló Spain
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Szymczyk K, Zdziennicka A, Jańczuk B. Adsorption and Aggregation Properties of Some Polysorbates at Different Temperatures. J SOLUTION CHEM 2018; 47:1824-1840. [PMID: 30524153 PMCID: PMC6244871 DOI: 10.1007/s10953-018-0823-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/19/2018] [Indexed: 11/28/2022]
Abstract
Measurements of the surface tension of aqueous solutions of polysorbates (Tween 20, Tween 60 and Tween 80) at 293, 303 and 313 K were made. On the basis of the obtained results the Gibbs surface excess concentration of the Tweens at the water–air interface and critical micelle concentrations were determined. Knowing the Gibbs surface excess concentration and taking into account the difference between the limiting area occupied by water and Tween molecules at the water–air interface, the fraction occupied by Tween molecules was established. The limiting area occupied by the Tween molecule was calculated by applying the Joos equation. The area determined in such a way was confirmed by the calculations of cross section of Tween molecules based on the bond lengths and the angles between them as well as the average distance between the molecules, taking into account their different conformations. This area was used for calculation of the standard Gibbs energy of adsorption using the Langmuir equation. The standard Gibbs energy of Tweens adsorption at the water–air interface was also calculated from the hydrophobic part of Tween molecule–water interface tension and that of hydrophobic part. Using the determined values of standard Gibbs energy of adsorption at different temperatures, the standard enthalpy and entropy values were deduced. The standard thermodynamic functions of micellization were also determined and compared to the Gibbs energy of Tween molecules interactions through the water phase.
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Affiliation(s)
- Katarzyna Szymczyk
- Department of Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
| | - Anna Zdziennicka
- Department of Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
| | - Bronisław Jańczuk
- Department of Interfacial Phenomena, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
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Lindemann M, Hinz S, Deuther-Conrad W, Namasivayam V, Dukic-Stefanovic S, Teodoro R, Toussaint M, Kranz M, Juhl C, Steinbach J, Brust P, Müller CE, Wenzel B. Radiosynthesis and in vivo evaluation of a fluorine-18 labeled pyrazine based radioligand for PET imaging of the adenosine A 2B receptor. Bioorg Med Chem 2018; 26:4650-4663. [PMID: 30104122 DOI: 10.1016/j.bmc.2018.07.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/23/2018] [Accepted: 07/26/2018] [Indexed: 02/07/2023]
Abstract
On the basis of a pyrazine core structure, three new adenosine A2B receptor ligands (7a-c) were synthesized containing a 2-fluoropyridine moiety suitable for 18F-labeling. Compound 7a was docked into a homology model of the A2B receptor based on X-ray structures of the related A2A receptor, and its interactions with the adenosine binding site were rationalized. Binding affinity data were determined at the four human adenosine receptor subtypes. Despite a rather low selectivity regarding the A1 receptor, 7a was radiolabeled as the most suitable candidate (Ki(A2B) = 4.24 nM) in order to perform in vivo studies in mice with the aim to estimate fundamental pharmacokinetic characteristics of the compound class. Organ distribution studies and a single PET study demonstrated brain uptake of [18F]7a with a standardized uptake value (SUV) of ≈1 at 5 min post injection followed by a fast wash out. Metabolism studies of [18F]7a in mice revealed the formation of a blood-brain barrier penetrable radiometabolite, which could be structurally identified. The results of this study provide an important basis for the design of new derivatives with improved binding properties and metabolic stability in vivo.
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Affiliation(s)
- Marcel Lindemann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | - Sonja Hinz
- Pharma Center Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | - Winnie Deuther-Conrad
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | - Vigneshwaran Namasivayam
- Pharma Center Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | | | - Rodrigo Teodoro
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | - Magali Toussaint
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | - Mathias Kranz
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | | | - Jörg Steinbach
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | - Peter Brust
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany
| | - Christa E Müller
- Pharma Center Bonn, Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | - Barbara Wenzel
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department of Neuroradiopharmaceuticals, Leipzig, Germany.
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Effect of Polysorbates on Solids Wettability and Their Adsorption Properties. COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids2030026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Yabré M, Ferey L, Somé IT, Gaudin K. Greening Reversed-Phase Liquid Chromatography Methods Using Alternative Solvents for Pharmaceutical Analysis. Molecules 2018; 23:molecules23051065. [PMID: 29724076 PMCID: PMC6100308 DOI: 10.3390/molecules23051065] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 04/25/2018] [Accepted: 04/25/2018] [Indexed: 12/13/2022] Open
Abstract
The greening of analytical methods has gained increasing interest in the field of pharmaceutical analysis to reduce environmental impacts and improve the health safety of analysts. Reversed-phase high-performance liquid chromatography (RP-HPLC) is the most widely used analytical technique involved in pharmaceutical drug development and manufacturing, such as the quality control of bulk drugs and pharmaceutical formulations, as well as the analysis of drugs in biological samples. However, RP-HPLC methods commonly use large amounts of organic solvents and generate high quantities of waste to be disposed, leading to some issues in terms of ecological impact and operator safety. In this context, greening HPLC methods is becoming highly desirable. One strategy to reduce the impact of hazardous solvents is to replace classically used organic solvents (i.e., acetonitrile and methanol) with greener ones. So far, ethanol has been the most often used alternative organic solvent. Others strategies have followed, such as the use of totally aqueous mobile phases, micellar liquid chromatography, and ionic liquids. These approaches have been well developed, as they do not require equipment investments and are rather economical. This review describes and critically discusses the recent advances in greening RP-HPLC methods dedicated to pharmaceutical analysis based on the use of alternative solvents.
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Affiliation(s)
- Moussa Yabré
- ChemBioPharm Team, ARNA Laboratory, INSERM U1212, CNRS UMR 5320, Bordeaux University, F-33000 Bordeaux, France.
- Laboratoire de développement du médicament, Université Ouaga 1 Pr Joseph Ki-Zerbo, Ouaga 03 BP 7021, Burkina Faso.
| | - Ludivine Ferey
- ChemBioPharm Team, ARNA Laboratory, INSERM U1212, CNRS UMR 5320, Bordeaux University, F-33000 Bordeaux, France.
| | - Issa Touridomon Somé
- Laboratoire de développement du médicament, Université Ouaga 1 Pr Joseph Ki-Zerbo, Ouaga 03 BP 7021, Burkina Faso.
| | - Karen Gaudin
- ChemBioPharm Team, ARNA Laboratory, INSERM U1212, CNRS UMR 5320, Bordeaux University, F-33000 Bordeaux, France.
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Pharr DY. Green analytical chemistry – the use of surfactants as a replacement of organic solvents in spectroscopy. PHYSICAL SCIENCES REVIEWS 2017. [DOI: 10.1515/psr-2017-0006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThis chapter gives an introduction to the many practical uses of surfactants in analytical chemistry in replacing organic solvents to achieve greener chemistry. Taking a holistic approach, it covers some background of surfactants as chemical solvents, their properties and as green chemicals, including their environmental effects. The achievements of green analytical chemistry with micellar systems are reviewed in all the major areas of analytical chemistry where these reagents have been found to be useful.
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Ibrahim F, El-Deen AK, El Abass SA, Shimizu K. An ecofriendly green liquid chromatographic method for simultaneous determination of nicotinamide and clindamycin phosphate in pharmaceutical gel for acne treatment. J Food Drug Anal 2017; 25:741-747. [PMID: 28911660 PMCID: PMC9328823 DOI: 10.1016/j.jfda.2016.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/30/2016] [Accepted: 09/19/2016] [Indexed: 11/17/2022] Open
Abstract
A new green micellar liquid chromatographic method was developed and validated for the quantitative estimation of nicotinamide (NICO) and clindamycin phosphate (CLD) in bulk and pharmaceutical gel formulation. The analytes are well resolved in less than 6.0 minutes using micellar mobile phase consisting of 0.10M sodium dodecyl sulfate (SDS), 0.3% triethylamine, and 10% 2-propanol in 0.02M orthophosphoric acid at pH 3.0, running through an Eclipse XDB-C8 column (150 mm × 4.6 mm, 5 μm particle size) with flow rate 1.0 mL/min. The effluent was monitored with diode array detection at 210 nm. The retention times of NICO and CLD were 3.8 minutes and 5.6 minutes, respectively. The method was validated according to the International Conference on Harmonisation (ICH) guidelines in terms of linearity, limit of detection, limit of quantification, accuracy, precision, robustness, and specificity to prove its reliability. Linear correlation was achieved by plotting the peak area of each drug against its concentration. It was found to be rectilinear in the ranges of 1.0–40.0 μg/mL and 0.5–15.0 μg/mL with limits of detection of 0.06 μg/mL and 0.03 μg/mL and limits of quantification of 0.19 μg/mL and 0.09 μg/mL for NICO and CLD, respectively. The method was successfully implemented for the simultaneous determination of the analytes in their bulk powder and combined gel formulation with high % recoveries. The ease of sample treatment facilitates and greatly expedites the treatment with reduced cost and improved accuracy of the procedure.
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Ibrahim F, Sharaf El-Din MK, El-Deen AK, Shimizu K. Micellar HPLC Method for Simultaneous Determination of Ethamsylate and Mefenamic Acid in Presence of Their Main Impurities and Degradation Products. J Chromatogr Sci 2016; 55:23-29. [PMID: 27681773 DOI: 10.1093/chromsci/bmw143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 07/25/2016] [Indexed: 11/12/2022]
Abstract
An eco-friendly sensitive, rapid and less hazardous micellar liquid chromatographic method was developed and validated for the simultaneous analysis of ethamsylate (ETM) and mefenamic acid (MFA) in the presence of hydroquinone (HQ) and 2,3-dimethylaniline (DMA) the main impurities of ETM and MFA, respectively. Good chromatographic separation was attained using Eclipse XDB-C8 column (150 mm × 4.6 mm, 5 μm particle size) adopting UV detection at 300 nm with micellar mobile phase consisting of 0.12 M sodium dodecyl sulfate, 0.3% triethylamine and 15% 2-propanol in 0.02 M orthophosphoric acid (pH 7.0) at 1.0 mL/min. The analytes were well resolved in <6.0 min, ETM (tR = 1.55 min), HQ (tR = 1.95 min), MFA (tR = 4.55 min) and DMA (tR = 5.80 min). Different validation parameters were examined as recommended by international conference on harmonization (ICH) guidelines. The method was linear over the concentration ranges of 0.5-18.0, 0.5-20.0, 0.01-0.5 and 0.02-0.2 µg/mL with limits of detection of 0.118, 0.159, 0.005 and 0.005 µg/mL and limits of quantification of 0.358, 0.482, 0.014 and 0.015 µg/mL for ETM, MFA, HQ and DMA, respectively. The suggested method was successfully applied for the determination of the two drugs in their bulk powder, laboratory-prepared mixtures, single-ingredient and co-formulated tablets. The obtained results were in accordance with those of the comparison method. The method can also detect trace amounts of HQ and DMA as the main impurities of ETM and MFA, respectively, within the BP limit (0.1%) for both impurities. Furthermore, it is a stability-indicating one for the determination of ETM in its pure form, single-component tablet and co-formulated tablets with other drugs.
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Affiliation(s)
- Fawzia Ibrahim
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Mohie K Sharaf El-Din
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Asmaa Kamal El-Deen
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.,Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenviromental Sciences, Kyushu University, Fukuoka 812-8581, Japan
| | - Kuniyoshi Shimizu
- Department of Agro-Environmental Sciences, Graduate School of Bioresource and Bioenviromental Sciences, Kyushu University, Fukuoka 812-8581, Japan
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15
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Chernyshova OS, Maslova YA. Protolytic properties of DL-alanyl-DL-methionine and its complexation in aqueous solutions and micellar solutions. COLLOID JOURNAL 2016. [DOI: 10.1134/s1061933x16030030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Šteflová J, Štefl M, Walz S, Knop M, Trapp O. Comprehensive study on critical micellar concentrations of SDS in acetonitrile-water solvents. Electrophoresis 2016; 37:1287-95. [DOI: 10.1002/elps.201500553] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/20/2016] [Accepted: 01/24/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Jana Šteflová
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Heidelberg Germany
| | - Martin Štefl
- Zentrum für Molekulare Biologie; Ruprecht-Karls-Universität Heidelberg; Heidelberg Germany
| | - Sarah Walz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Heidelberg Germany
| | - Michael Knop
- Zentrum für Molekulare Biologie; Ruprecht-Karls-Universität Heidelberg; Heidelberg Germany
| | - Oliver Trapp
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Heidelberg Germany
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17
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Babamoradi H, Abdollahi H. Study of monoprotic acid-base equilibria in aqueous micellar solutions of nonionic surfactants using spectrophotometry and chemometrics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:851-859. [PMID: 26002436 DOI: 10.1016/j.saa.2015.04.091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 04/20/2015] [Accepted: 04/22/2015] [Indexed: 06/04/2023]
Abstract
Many studies have shown the distribution of solutes between aqueous phase and micellar pseudo-phase in aqueous micellar solutions. However, spectrophotometric studies of acid-base equilibria in these media do not confirm such distribution because of the collinearity between concentrations of chemical species in the two phases. The collinearity causes the number of detected species to be equal to the number of species in a homogenous solution that automatically misinterpreted as homogeneity of micellar solutions, therefore the collinearity is often neglected. This interpretation is in contradiction to the distribution theory in micellar media that must be avoided. Acid-base equilibrium of an indicator was studied in aqueous micellar solutions of a nonionic surfactant to address the collinearity using UV/Visible spectrophotometry. Simultaneous analysis (matrix augmentation) of the equilibrium and solvation data was applied to eliminate the collinearity from the equilibrium data. A model was then suggested for the equilibrium that was fitted to the augmented data to estimate distribution coefficients of the species between the two phases. Moreover, complete resolution of concentration and spectral profiles of species in each phase was achieved.
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Affiliation(s)
- Hamid Babamoradi
- University of Copenhagen, Faculty of Science, Department of Food Science, Spectroscopy & Chemometrics Section, Rolighedsvej 30, DK-1958 Frederiksberg, Denmark.
| | - Hamid Abdollahi
- Institute for Advanced Studies in Basic Sciences (IASBS), Department of Chemistry, 45137-66731 Zanjan, Iran
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18
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In vitro prediction of human intestinal absorption and blood–brain barrier partitioning: development of a lipid analog for micellar liquid chromatography. Anal Bioanal Chem 2015; 407:7453-66. [DOI: 10.1007/s00216-015-8911-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/07/2015] [Accepted: 07/08/2015] [Indexed: 10/23/2022]
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19
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Development of LC–MS/MS methodology for the detection/determination and confirmation of chloramphenicol, chloramphenicol 3-O-β-d-glucuronide, florfenicol, florfenicol amine and thiamphenicol residues in bovine, equine and porcine liver. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 991:68-78. [DOI: 10.1016/j.jchromb.2015.04.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 12/21/2022]
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20
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Lamounier AP, Mateus NS, da Cunha ALMC, Luna AS, Aucélio RQ. Determination of Six β-carboline Alkaloids in Urine and Phytotherapic Extracts Using Micellar Liquid Chromatography with Fluorimetric Detection. J LIQ CHROMATOGR R T 2015. [DOI: 10.1080/10826076.2014.1001906] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- A. P. Lamounier
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
- Department of Chemistry, Federal Institute of Education, Science and Technology (IFRJ), Rio de Janeiro, Brazil
| | - N. S. Mateus
- Department of Chemistry, Federal Institute of Education, Science and Technology (IFRJ), Rio de Janeiro, Brazil
| | - A. L. M. C. da Cunha
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
| | - A. S. Luna
- Rio de Janeiro State University (UERJ), Rio de Janeiro, Brazil
| | - R. Q. Aucélio
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
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21
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Esaka Y, Rin F, Kobayashi M, Osako R, Murakami H, Uno B. Stepwise elusion method in micellar electrokinetic chromatography via sequential use of lithium perfluorooctadecyl sulfonate and lithium dodecyl sulfate. J Chromatogr A 2014; 1358:261-8. [PMID: 25022480 DOI: 10.1016/j.chroma.2014.06.073] [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: 03/26/2014] [Revised: 06/20/2014] [Accepted: 06/22/2014] [Indexed: 10/25/2022]
Abstract
An effective stepwise micellar electrokinetic chromatography (MEKC) elution method was developed using lithium perfluorooctadecyl sulfonate (LPFOS) and lithium dodecyl sulfate (LDS). The hydrogen-bonding property of LPFOS micelles differs from that of LDS micelles, which leads to remarkably different selectivity in the transfer of solutes to the micelles. The present stepwise method is performed by replacing the inlet reservoir of a first running solution containing LPFOS with that of a second running solution containing LDS during a single separation run in the absence of electroosmotic flow under acidic conditions, where LPFOS micelles work as carriers in first and then LDS micelles turn over. Effective separation of 15 nonionic aromatic compounds was controlled well by adjusting the time in the inlet reservoir, which could not be accomplished with systems using only LPFOS or only LDS, with significant changes in the elution order where necessary. Furthermore, separations with the present stepwise method were easily simulated, and the replacement time was optimized for 3.1min from a 70.0mM LPFOS solution to a 67.5mM LDS solution with nearly complete separation within 15min using the simulated parameters.
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Affiliation(s)
- Yukihiro Esaka
- Gifu Pharmaceutical University, Gifu 501-1196, Japan; United Graduate School of Drug Discovery and Medical Information Science, Gifu University, Gifu 501-1193, Japan.
| | - Fumiaki Rin
- Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | | | - Ryohei Osako
- Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | | | - Bunji Uno
- Gifu Pharmaceutical University, Gifu 501-1196, Japan; United Graduate School of Drug Discovery and Medical Information Science, Gifu University, Gifu 501-1193, Japan
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22
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Dubey S, Bose D, Shukla SK, Durgbanshi A, Esteve-Romero J, Carda-Broch S. DETERMINATION OF ALPHA-BETA ARTEETHER IN PHARMACEUTICAL PRODUCTS USING DIRECT INJECTION MICELLAR LIQUID CHROMATOGRAPHY. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2013.825852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- S. Dubey
- a Department of Criminology and Forensic Science , Dr. Harisingh Gour University , Sagar (M.P.) , India
| | - D. Bose
- a Department of Criminology and Forensic Science , Dr. Harisingh Gour University , Sagar (M.P.) , India
| | - S. K. Shukla
- b Central Forensic Science Laboratory (C.F.S.L.) , Chandigarh , India
| | - A. Durgbanshi
- c Department of Applied Chemistry , Institute of Technology, Banaras Hindu University , Varanasi , India
| | - J. Esteve-Romero
- d Departament de Química Física i Analítica , Universitat Jaume I , Castelló , Spain
| | - S. Carda-Broch
- d Departament de Química Física i Analítica , Universitat Jaume I , Castelló , Spain
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23
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Samokhina L, Loginova L, Stepanko D. The Quantitative Characterization of Chemical Modification of Sodium Dodecyl Sulphate Micellar Solutions and Retention Model in Micellar Liquid Chromatography. TENSIDE SURFACT DET 2013. [DOI: 10.3139/113.100294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The micelle solutions of sodium dodecyl sulphate (NaDS) modified by simultaneously presence of different aliphatic alcohols and an inorganic salt have been quantitatively characterized by the values of critical micelle concentrations, the degrees of counter-ion binding and electrostatic potentials of surface. The obtained characteristics of hybrid micelles and the coefficients of modifier distribution between aqueous solution and micellar pseudophase were used to develop a conceptual retention model in micellar liquid chromatography (MLC). The new retention model takes into account the microenvironment changes of an analyte when it goes from the hybrid micellar eluent to a modified surface of alkyl-bounded sorbent.
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24
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Hosseinzadeh R, Khorsandi K, Hemmaty S. Study of the effect of surfactants on extraction and determination of polyphenolic compounds and antioxidant capacity of fruits extracts. PLoS One 2013; 8:e57353. [PMID: 23472082 PMCID: PMC3589432 DOI: 10.1371/journal.pone.0057353] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 01/21/2013] [Indexed: 12/05/2022] Open
Abstract
Micelle/water mixed solutions of different surface active agents were studied for their effectiveness in the extraction of polyphenolic compounds from various varieties of apples from west Azerbaijan province in Iran. The total content of polyphenolic compound in fruit extracts were determined using ferrous tartrate and Folin–Ciocalteu assays methods and chromatographic methods and compared with theme. High performance liquid chromatography is one of the most common and important methods in biochemical compound identification. The effect of pH, ionic strength, surfactant type, surfactant concentration, extraction time and common organic solvent in the apple polyphenolics extractions was studied using HPLC-DAD. Mixtures of surfactants, water and methanol at various ratios were examined and micellar-water solutions of Brij surfactant showed the highest polyphenol extraction efficiency. Optimum conditions for the extraction of polyphenolic compounds from apple occurred at 7 mM Brij35, pH 3. Effect of ionic strength on extraction was determined and 2% (W/V) potassium Chloride was determined to be the optimum salt concentration. The procedure worked well with an ultrasound bath. Total antioxidant capacity also was determined in this study. The method can be safely scaled up for pharmaceutical applications.
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Affiliation(s)
- Reza Hosseinzadeh
- Food and Chemical Analysis Research Lab, Academic Center for Education, Culture and Research, Urmia Branch, University of Urmia, Urmia, Iran.
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25
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Micellar Electrokinetic Chromatography Method for Determination of the Ten Water-Soluble Vitamins in Food Supplements. FOOD ANAL METHOD 2013. [DOI: 10.1007/s12161-013-9576-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Caglayan MG, Palabiyik IM, Onur F. STABILITY-INDICATING MICELLAR ELEKTROKINETIC CHROMATOGRAPHY METHOD FOR DETERMINATION OF FINASTERIDE IN PHARMACEUTICAL PREPARATIONS. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2012.673214] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mehmet Gokhan Caglayan
- a Department of Analytical Chemistry , Faculty of Pharmacy, Ankara University , Ankara , Turkey
| | - Ismail Murat Palabiyik
- a Department of Analytical Chemistry , Faculty of Pharmacy, Ankara University , Ankara , Turkey
| | - Feyyaz Onur
- a Department of Analytical Chemistry , Faculty of Pharmacy, Ankara University , Ankara , Turkey
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27
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Recent theoretical and practical applications of micellar liquid chromatography (MLC) in pharmaceutical and biomedical analysis. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0004-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractMicellar liquid chromatography (MLC) is an analytical technique belonging to the wide range of reversed-phase liquid chromatographic (RP-LC) separation techniques. MLC with the use of surfactant solutions above its critical micellar concentration (CMC) and the addition of organic modifiers is currently an important analytical tool with still growing theoretical considerations and practical applications in pharmaceutical analysis of drugs and other biologically active compounds. The use of MLC as an alternative, relatively much faster in comparison to conventional chromatographic separation techniques has several advantages, especially as being suitable for screening pharmaceutical analysis. The analytical data received from MLC analysis are considered a useful source of information to predict passive drug absorption, drug transport and other pharmacokinetics and physicochemical measures of pharmaceutical substances. In the review several MLC assays for determination of drugs and other active compounds in biological samples were compared and critically discussed. The presented overview provides information on recent applications and achievements connected with the practical use of MLC. The review covers fields of interest related to theory and mechanism of MLC separation, direct applications of MLC in pharmaceutical analysis, including optimization and efficiency of separation with the use of modification of stationary phase and mobile phase compositions as well as the determination of physicochemical characteristics of drugs by MLC.
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28
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Stanley B, Lucy CA. Micellar electrokinetic chromatography with acid labile surfactant. J Chromatogr A 2012; 1226:55-60. [DOI: 10.1016/j.chroma.2011.09.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 09/23/2011] [Accepted: 09/23/2011] [Indexed: 01/12/2023]
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29
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Determination of donepezil hydrochloride in human plasma and pharmaceutical formulations by HPLC with fluorescence detection. ACTA PHARMACEUTICA 2011; 61:403-13. [PMID: 22202199 DOI: 10.2478/v10007-011-0035-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A sensitive, isocratic reversed-phase high performance liquid chromatographic method involving fluorescence detection was developed for the determination of donepezil hydrochloride in tablets and in human plasma. Pindolol was used as an internal standard. Good chromatographic separation was achieved by using an analytical column C18. The system operated at room temperature using a mobile phase consisting of methanol, phosphate buffer (0.02 mol L⁻¹) and triethyl amine (pH 3.5) (55 : 45 : 0.5, V/V/V) at a flow rate 0.9 mL⁻¹ min. The analyte and internal standard were extracted from human plasma via liquid-liquid extraction. The proposed method was validated for sensitivity, selectivity, linearity, accuracy and precision. The calibration curve was linear over the range of 5-2000 ng mL⁻¹ of donepezil with detection limit of 1.5 ng mL⁻¹. Intra- and inter-day relative standard deviations were less than 2.5%. The method was found to be suitable for quality control of donepezil hydrochloride in bulk drug as well as in human plasma.
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30
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Lloyd NW, Kardaras E, Ebeler SE, Dungan SR. Measuring Local Equilibrium Flavor Distributions in SDS Solution Using Headspace Solid-Phase Microextraction. J Phys Chem B 2011; 115:14484-92. [DOI: 10.1021/jp206984q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nathan W. Lloyd
- Department of Chemical Engineering and Materials Science, ‡Department of Food Science and Technology, and §Department of Viticulture and Enology, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Eleni Kardaras
- Department of Chemical Engineering and Materials Science, ‡Department of Food Science and Technology, and §Department of Viticulture and Enology, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Susan E. Ebeler
- Department of Chemical Engineering and Materials Science, ‡Department of Food Science and Technology, and §Department of Viticulture and Enology, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Stephanie R. Dungan
- Department of Chemical Engineering and Materials Science, ‡Department of Food Science and Technology, and §Department of Viticulture and Enology, University of California, Davis, One Shields Avenue, Davis, California 95616, United States
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31
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Loizidou EZ, Sun L, Zeinalipour-Yazdi C. Receptor-attached amphiphilic terpolymer for selective drug recognition in aqueous solutions. J Mol Recognit 2011; 24:678-86. [DOI: 10.1002/jmr.1098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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32
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Bongiorno D, Ceraulo L, Giorgi G, Indelicato S, Ferrugia M, Ruggirello A, Liveri VT. Effects of the net charge on abundance and stability of supramolecular surfactant aggregates in gas phase. JOURNAL OF MASS SPECTROMETRY : JMS 2011; 46:195-201. [PMID: 21259391 DOI: 10.1002/jms.1872] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Accepted: 11/17/2010] [Indexed: 05/30/2023]
Abstract
Self-assembling of amphiphilic molecules under electrospray ionization (ESI) conditions is characterized by quite unexpected phenomenology. The noticeable differences with respect to the condensed phase are attributable to the absence of the surfactant-solvent interactions, the presence of net charge in the aggregates, and the strong deviation from equilibrium conditions. Aiming to investigate the effects of the net charge on abundance and stability of supramolecular surfactant aggregates, positively and negatively charged aggregates of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) and sodium methane sulfonate (MetS), butane sulfonate (ButS) and octane sulfonate (OctS) have been studied by ESI mass spectrometry, energy resolved mass spectrometry and density functional theory calculations. The negatively charged aggregates are found to be less stable than their positive counterparts. The results are consistent with a self-assembling pattern dominated by electrostatic interactions involving the counterions and head groups of the investigated amphiphilic compounds while the alkyl chains point outwards, protecting the aggregates from unlimited growth processes.
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Affiliation(s)
- David Bongiorno
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università degli Studi di Palermo, Via Archirafi 32, I-90123 Palermo, Italy
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El Deeb S, Iriban MA, Gust R. MEKC as a powerful growing analytical technique. Electrophoresis 2010; 32:166-83. [PMID: 21171121 DOI: 10.1002/elps.201000398] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Revised: 09/30/2010] [Accepted: 09/30/2010] [Indexed: 11/11/2022]
Abstract
This review summarizes the principle and the developments in MEKC in terms of separation power, sensitivity, and detection approaches more than 25 years after its appearance. Newly used surfactants are mentioned. Classical and new sample concentration techniques in MEKC are described. The different detection approaches in MEKC with advantages, limitations, and future prospects are also discussed. This review highlights the wider application of MEKC in different analytical fields. Various recent selected applications of this technique in different analytical fields are reported.
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Affiliation(s)
- Sami El Deeb
- Institute of Pharmacy, Freie Universität Berlin, Berlin, Germany
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Abstract
AbstractWe have developed a capillary electrophoresis method to characterize the QD surface ligand interactions with various surfactant systems. The method was demonstrated with 2–5 nm CdSe nanoparticles surface-passivated with trioctylphosphine oxide (TOPO). Water solubility was accomplished by surfactant-assisted phase transfer via an oil-in-water microemulsion using either cationic, anionic, or non-ionic surfactants. Interaction between the QD surface ligand (TOPO) and the alkyl chain of the surfactant molecule produces a complex and dynamic surface coating that can be characterized through manipulation of CE separation buffer composition and capillary surface modification. Additional characterization of the QD surface ligand interactions with surfactants was accomplished by UV-VIS spectroscopy, photoluminescence, and TEM. It is anticipated that studies such as these will elucidate the dynamics of QD surface ligand modifications for use in sensors.
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Cao J, Qu H, Cheng Y. Micellar and aqueous-organic liquid chromatography using sub-2 μm packings for fast separation of natural phenolic compounds. J Sep Sci 2010; 33:1946-53. [DOI: 10.1002/jssc.201000005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Butwong N, Burakham R, Srijaranai S. Use of Surfactant as Mobile Phase Additive in LC for Simultaneous Determination of Metal-Pyrrolidine Dithiocarbamate Chelates. Chromatographia 2010. [DOI: 10.1365/s10337-010-1509-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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37
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Detection of prohibited substances in equestrian sport through direct injection of equine serum using micellar LC. Bioanalysis 2010; 2:229-35. [DOI: 10.4155/bio.09.171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Detection of prohibited substances in equestrian sports typically involves time-consuming and tedious sample-preparation methods. Micellar LC (MLC) allows for direct injection of equine serum to detect prohibited NSAIDs. Results: The method was linear over the range of standards examined, with recoveries of 94.2–95.1% for phenylbutazone (12–18 µg/ml), and 83.9–88.7% and 87.9–105.0% for diclofenac and flunixin, respectively (0.1–1.2 µg/ml). The limit of detection was 0.1 µg/ml for all compounds and the limit of quantitation was 0.2 µg/ml for phenylbutazone and 0.3 µg/ml for diclofenac and flunixin. Conclusion: The MLC method of direct equine serum injection was shown to be valid and simple for the quantitation of banned NSAIDs in equine serum.
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Bongiorno D, Ceraulo L, Giorgi G, Indelicato S, Ruggirello A, Turco Liveri V. Supramolecular aggregates in vacuum: positively monocharged sodium alkanesulfonate clusters. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2010; 16:151-161. [PMID: 20065519 DOI: 10.1255/ejms.1013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The formation and structural features of positively monocharged aggregates of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and sodium methane--(MetS), butane--(ButS) and octane--(OctS) sulfonate molecules in gas phase have been investigated by electrospray ionization mass spectrometry, energy resolved mass spectrometry and density functional theory (DFT) calculations. The experimental results show that the center-of-mass collision energy required to dissociate 50% of these monocharged aggregates scantly depends on the length of the alkyl chain as well as on the aggregation number. This, together with the large predominance of monocharged species in the mass spectra, was rationalized in terms of an aggregation pattern mainly driven by the counter ions and head groups electrostatic interactions while minor effects were attributed to the steric hindrance caused by the size of the surfactant head group and alkyl chain. DFT calculations show that the most favoured structural arrangement of these aggregates is always characterized by an internal polar core constituted by the sodium counter ions and surfactant head groups surrounded by an external layer composed by the surfactant alkyl chains.
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Affiliation(s)
- David Bongiorno
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32, I-90123 Palermo, Italy
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Attia MS. Spectrofluorimetric quantification of bromazepam using a highly selective optical probe based on Eu3+-bromazepam complex in pharmaceutical and serum samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:972-976. [PMID: 19781983 DOI: 10.1016/j.saa.2009.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Revised: 08/04/2009] [Accepted: 09/01/2009] [Indexed: 05/28/2023]
Abstract
A rapid, simple and sensitive spectrofluorimetric method for determination of trace amount of bromazepam is developed. In phosphate buffer of pH 7.4. The bromazepam enhance the luminescence intensity of the Eu(3+) ion in Eu(3+)-bromazepam complex at lambda(ex)=390nm. The produced luminescence intensity of Eu(3+)-bromazepam complex is in proportion to the concentration of bromazepam. The working range for the determination of bromazepam is 2.3x10(-8) to 6.2x10(-7)M with detection limit (LoD) and quantitative detection limit (LoQ) of 3x10(-9) and 1.2x10(-8)M, respectively. While, the working range, detection limit (LoD) and quantitative detection limit (LoQ) in case of the quantum yield calculations are 3.7x10(-8) to 3.4x10(-7)M with of 3.4x10(-9) and 9.2x10(-8)M, respectively. The enhancement mechanism of the luminescence intensity in the Eu(3+)-bromazepam system has been also explained.
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Affiliation(s)
- M S Attia
- Department of Chemistry, Faculty of Science, Ain Shams University, Cairo 115611, Egypt. Mohamed
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Chiesl TN, Chu WK, Stockton AM, Amashukeli X, Grunthaner F, Mathies RA. Enhanced amine and amino acid analysis using Pacific Blue and the Mars Organic Analyzer microchip capillary electrophoresis system. Anal Chem 2009; 81:2537-44. [PMID: 19245228 DOI: 10.1021/ac8023334] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The fluorescent amine reactive probe Pacific Blue succinimidyl ester (PB) is used for the detection of trace amounts of amines and amino acids by microchip capillary electrophoresis on the Mars Organic Analyzer (MOA). The spectral and chemical properties of PB provide a 200-fold increase in sensitivity and improved resolution compared to fluorescamine derivatization. With the use of cross injection and PB labeling, the MOA detected amino acids at concentrations as low as 75 pM (sub-parts-per-trillion). Micellar electrokinetic chromatography (MEKC) which separates PB-labeled amino acids by their hydrophobicity is also demonstrated. The optimized MEKC conditions (45 mM CHAPSO, pH 6 at 5 degrees C) effectively separated amines and 25 amino acids with enantiomeric resolution of alanine, serine, and citrulline. Samples from the Yungay Hills region in the Atacama Desert, Chile, and from the Murchison meteorite are successfully analyzed using both techniques, and amino acids are found in the parts-per-billion range. Abiotic amino acids such as beta-alanine and epsilon-aminocaprioc acid are detected along with several neutral and acidic amino acids in the Murchison sample. The Atacama Desert sample is found to contain homochiral L-alanine and L-serine indicating the presence of extant or recently extinct life.
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Affiliation(s)
- Thomas N Chiesl
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA
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Liu X, Abbott NL. Electrochemical generation of gradients in surfactant concentration across microfluidic channels. Anal Chem 2009; 81:772-81. [PMID: 19086794 DOI: 10.1021/ac801933v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the generation and manipulation of spatial gradients in surfactant and micelle concentration across microfluidic channels by combining use of a redox-active surfactant with electrochemical methods. The approach is founded on the observation that 11-ferrocenylundecyltrimethylammonium bromide (FTMA) behaves as a surfactant in aqueous solution (e.g., self-assembles to form micelles at a critical concentration of 0.1 mM in aqueous 0.1 M Li(2)SO(4)) whereas oxidized FTMA remains dispersed in a monomeric state up to concentrations of at least 30 mM. By flowing aqueous FTMA solutions through microfluidic channels (width of 80 microm, depth of 72 microm, and length of 42 mm) and by applying potentials of 0 V (vs Ag|AgCl; cathode) and +0.3 V (vs Ag|AgCl; anode) to gold electrodes lining both side-walls of the microfluidic channels, we measured lateral gradients in concentration of oxidized FTMA and reduced FTMA to be generated across the microfluidic channels by splitting the exiting stream into four channels. These measurements revealed the lateral concentration profile of FTMA to be consistent with the presence of slowly diffusing micelles of FTMA in a spatially localized region near the cathode and monomeric FTMA only near the anode. The lateral concentration profiles of reduced and oxidized FTMA, and thus the patterning of micelles within the microfluidic channels, were manipulated via changes in the inlet FTMA concentration, potentials applied to the electrodes, and flow rate. These experimental measurements were compared to a simple model, which assumed fast electrode kinetics, lateral transport of FTMA by diffusion only (no migration), and local micelle-monomer equilibrium within the bulk solution. This comparison revealed qualitative but not quantitative agreement between model and experiment. Calculations of ionic conductivity and associated experimental measurements support the proposition that Ohmic resistance to the passage of current along the channel (between the working and the counter electrodes) contribute, in part, to the lack of quantitative agreement between the model and the measurements. The capability to generate and manipulate lateral concentration profiles of surfactants and micelles across microfluidic channels, as demonstrated by the results presented in this paper, offers the basis of new principles for continuous separation processes and microanalytical systems, and more broadly, new methods to generate gradients in concentration of analytes that interact with surfactants.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706-1691, USA
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Skórka M, Asztemborska M. Micellization of bile salts in a formamide solution: A gas liquid chromatography study. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2008.08.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ruiz-Angel MJ, Carda-Broch S, Torres-Lapasió JR, García-Alvarez-Coque MC. Retention mechanisms in micellar liquid chromatography. J Chromatogr A 2008; 1216:1798-814. [PMID: 18838142 DOI: 10.1016/j.chroma.2008.09.053] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 09/10/2008] [Accepted: 09/12/2008] [Indexed: 10/21/2022]
Abstract
Micellar liquid chromatography (MLC) is a reversed-phase liquid chromatographic (RPLC) mode with mobile phases containing a surfactant (ionic or non-ionic) above its critical micellar concentration (CMC). In these conditions, the stationary phase is modified with an approximately constant amount of surfactant monomers, and the solubilising capability of the mobile phase is altered by the presence of micelles, giving rise to diverse interactions (hydrophobic, ionic and steric) with major implications in retention and selectivity. From its beginnings in 1980, the technique has evolved up to becoming a real alternative in some instances (and a complement in others) to classical RPLC with hydro-organic mixtures, owing to its peculiar features and unique advantages. This review is aimed to describe the retention mechanisms (i.e. solute interactions with both stationary and mobile phases) in an MLC system, revealed in diverse reports where the retention behaviour of solutes of different nature (ionic or neutral exhibiting a wide range of polarities) has been studied in a variety of conditions (with ionic and non-ionic surfactants, added salt and organic solvent, and varying pH). The theory is supported by several mechanistic models that describe satisfactorily the retention behaviour, and allow the measurement of the strength of solute-stationary phase and solute-micelle interactions. Suppression of silanol activity, steric effects in the packing pores, anti-binding behaviour, retention of ionisable compounds, compensating effect on polarity differences among solutes, and the contribution of the solvation parameter model to elucidate the interactions in MLC, are commented.
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Affiliation(s)
- M J Ruiz-Angel
- Department of Analytical Chemistry, University of Valencia, c/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
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Thomas DP, Foley JP. Improved efficiency in micellar liquid chromatography using triethylamine and 1-butanol as mobile phase additives to reduce surfactant adsorption. J Chromatogr A 2008; 1205:36-45. [DOI: 10.1016/j.chroma.2008.07.082] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2007] [Revised: 07/23/2008] [Accepted: 07/25/2008] [Indexed: 11/27/2022]
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Ge L, Tan SN, Yong JWH, Hua L, Ong ES. Separation of cytokinin isomers with a partial filling-micellar electrokinetic chromatography-mass spectrometry approach. Electrophoresis 2008; 29:2024-32. [DOI: 10.1002/elps.200700474] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Amundsen LK, Kokkonen JT, Sirén H. Comparison of partial filling MEKC analyses of steroids with use of ESI-MS and UV spectrophotometry. J Sep Sci 2008; 31:803-13. [DOI: 10.1002/jssc.200700657] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lokajová J, Hruška V, Tesařová E, Gaš B. System peaks in micellar electrophoresis: I. Utilization of system peaks for determination of critical micelle concentration. Electrophoresis 2008; 29:1189-95. [DOI: 10.1002/elps.200700780] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Oszwałdowski S, Timerbaev AR. An advanced application of the quantitative structure–activity relationship concept in electrokinetic chromatography of metal complexes. Electrophoresis 2008; 29:827-34. [DOI: 10.1002/elps.200700659] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kulikov AU, Verushkin AG. Simultaneous Determination of Paracetamol, Caffeine, Guaifenesin and Preservatives in Syrups by Micellar LC. Chromatographia 2008. [DOI: 10.1365/s10337-007-0510-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Application of micellar electrokinetic capillary chromatography for routine analysis of different materials. HEMIJSKA INDUSTRIJA 2008. [DOI: 10.2298/hemind0803181i] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Micellar electrokinetic capillary chromatography (MEKC) has become a popular mode among the several capillary electro-migration techniques. Most drug analysis can be performed by using MEKC because of its wide applicability. Separation of very complex mixtures, determination of drugs in the biological materials, etc., can be successfully achieved by MEKC. This review surveys typical applications of MEKC analysis. Recent advances in MEKC, especially with solid-phase extraction and large-volume sample stacking, are described. Modes of electrokinetic chromatography including MEKC, a separation theory of MEKC, environmental friendly analysis, and selectivity manipulation in MEKC are also briefly mentioned.
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