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Varona-Torres E, Schug KA. Thermodynamic characterization of interactions between environmental contaminants and room temperature ionic liquids using static headspace gas chromatography with vacuum ultraviolet detection. Anal Chim Acta 2023; 1264:341236. [PMID: 37230731 DOI: 10.1016/j.aca.2023.341236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/19/2023] [Accepted: 04/19/2023] [Indexed: 05/27/2023]
Abstract
Understanding the thermodynamic interactions between an analyte and the sample phase is of paramount importance when choosing a co-solvent in headspace analysis. A sample phase - gas phase equilibrium partition coefficient (Kp) is used fundamentally to describe the distribution of the analyte between the two phases. Kp determinations by headspace gas chromatography (HS-GC) were acquired by two methods: vapor phase calibration (VPC) and phase ratio variation (PRV). Here, we demonstrated a pressurized - loop headspace system in conjunction with gas chromatography vacuum ultraviolet detection (HS-GC-VUV) to directly calculate the concentration of analytes in the gas phase from room temperature ionic liquids (RTILs) sample phases, using pseudo-absolute quantification (PAQ). PAQ, an attribute of VUV detection, allowed for quick determination of Kp and other thermodynamic properties, such as enthalpy (ΔH) and entropy (ΔS) of the system through the use of van't Hoff plots in the temperature range of 70-110 °C. The Kp determinations by PAQ were comparable to those obtained using the VPC method with percent difference ranging from ≤ 1-33%. Kp determinations were made for analytes (cyclohexane, benzene, octane, toluene, chlorobenzene, ethylbenzene, m-,p-, and o-xylene) at the varying temperatures (70-110 °C) using different RTILs (1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][ESO4]), 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]), and tris(2-hydroxyethyl)methylammonium methylsulfate ([MTEOA][MeOSO3])) and (1-ethyl-3-methylimidazolium bis(trisfluoromethanesulfonyl)imide ([EMIM] [NTF2])). The results from the van't Hoff analysis revealed that [EMIM] cation-based RTILs exhibit strong solute-solvent interactions with analytes that have π- electrons.
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Affiliation(s)
- Emmanuel Varona-Torres
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, USA
| | - Kevin A Schug
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, TX, USA.
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2
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Separation and Enrichment of Selected Polar and Non-Polar Organic Micro-Pollutants—The Dual Nature of Quaternary Ammonium Ionic Liquid. Processes (Basel) 2022. [DOI: 10.3390/pr10081636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this study, the dual nature of quaternary ammonium ionic liquid–didecyldimethylammonium perchlorate, [DDA][ClO4], was evaluated. A novel and sensitive in situ ionic liquid dispersive liquid–liquid microextraction method (in situ IL-DLLME) combined with magnetic retrieval (MR) was applied to enrich and separate selected organic micro-pollutants, both polar and non-polar. The magnetic support relied on using unmodified magnetic nanoparticles (MNPs) prepared by the co-precipitation of Fe2+/Fe3+ (Fe3O4). The separation technique was on-lined with high-performance liquid chromatography (HPLC–DAD) verified by inverse gas chromatography. An anion exchanger, NaClO4, was added to form an in situ hydrophobic IL. The fine droplets of [DDA][ClO4], molded in aqueous samples, functioned as an extractant for isolating the studied compounds. Then the carrier MNPs were added to separate the IL from the water matrix. The supernatant-free sample was desorbed in acetonitrile (MeCN) and injected into the HPLC system. The applicability of [DDA][ClO4] as an extraction solvent in the MR in situ IL-DLLME method was checked by the selectivity parameters (Sij∞) at infinite dilution. The detection limit (LOD) ranged from 0.011 to 0.079 µg L−1 for PAHs and from 0.012 to 0.020 µg L−1 for benzophenones. The method showed good linearity with correlation coefficients (r2) ranging from 0.9995 to 0.9999.
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3
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Molecular dynamic insight into solubility of H2S in ionic liquids [emim][BF4], [emim][OTf] and [emim][Tf2N]. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Deepa PR, Nalini V, Surianarayanan M, Krishnakumar S. Towards safer non-volatile tissue fixatives: Evaluation of choline-based ionic liquids for fixing ocular tissues. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111777. [PMID: 33352431 DOI: 10.1016/j.ecoenv.2020.111777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/19/2020] [Accepted: 12/06/2020] [Indexed: 06/12/2023]
Abstract
Volatile organic chemicals (VOCs) are routinely used for processing biological tissue samples in clinical laboratories. Recognizing their serious health and environmental impacts, a few non-volatile green solvents (choline based ionic liquids, ILs) were evaluated as tissue fixatives here. Microscopic evaluation of histo-morphology, fixation and staining quality, and macromolecular integrity (DNA and proteins) were assessed in human eye tissues (sclera, choroid, retinal layers and retinal pigmented epithelium, eyelid and orbit) after IL-fixation. Formalin-fixed tissues were used as standard reference. Microscopic examination revealed favorable histomorphology, tissue fixation and staining characteristics in most tissues immersed in ILs. Time taken to fix, and stability over a period of time (24 h, 48 h, 1 week, 1 month) was also recorded. Electrophoretic analysis revealed stability of cellular proteins and nucleic acids in IL-fixed scleral tissues. Heterogeneity in tissue fixation property relative to the type of ocular tissue, duration of fixation and storage, warrant further design and optimization of ILs to fix biological tissues. The simple cholinium salts based ILs tested here show favorable potential for tissue fixation application, and as an alternative approach to the use of VOCs, towards sustainable biomedical practice.
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Affiliation(s)
- P R Deepa
- Department of Biological Sciences, Birla Institute of Technology & Science (BITS), Pilani 333 031, Rajasthan, India.
| | - V Nalini
- Department of Biological Sciences, Birla Institute of Technology & Science (BITS), Pilani 333 031, Rajasthan, India; L&T Department of Ocular Pathology, Kamalnayan Bajaj Institute for Research in Vision and Ophthalmology, Vision Research Foundation, Sankara Nethralaya, 18, College Road, 600 006 Chennai, India
| | - M Surianarayanan
- Cell for Industrial Safety and Risk Analysis (CISRA), Central Leather Research Institute (CSIR-CLRI), Adyar, Chennai, India
| | - S Krishnakumar
- L&T Department of Ocular Pathology, Kamalnayan Bajaj Institute for Research in Vision and Ophthalmology, Vision Research Foundation, Sankara Nethralaya, 18, College Road, 600 006 Chennai, India.
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Garajová K, Sedláková D, Berta M, Gazova Z, Sedlák E. Destabilization effect of imidazolium cation-Hofmeister anion salts on cytochrome c. Int J Biol Macromol 2020; 164:3808-3813. [DOI: 10.1016/j.ijbiomac.2020.09.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 08/24/2020] [Accepted: 09/02/2020] [Indexed: 01/15/2023]
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6
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Shuaib M, Shah RA, Durrani I, Bilal M. Electrokinetic viscous rotating disk flow of Poisson-Nernst-Planck equation for ion transport. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113412] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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8
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Wang Q, Chen R, Shatner W, Cao Y, Bai Y. State-of-the-art on the technique of dispersive liquid-liquid microextraction. ULTRASONICS SONOCHEMISTRY 2019; 51:369-377. [PMID: 30377081 DOI: 10.1016/j.ultsonch.2018.08.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 07/27/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
Dispersive liquid-liquid microextraction is a new sample pretreatment technology based on traditional liquid liquid extraction. In this paper, the application of low-toxicity extractants such as low-density extractants, auxiliary extractants, stripping agents and ionic liquids in this technology and the extraction modes such as solvent de-emulsification, suspension extractant curing, auxiliary extraction, back extraction, and ionic liquid-dispersion liquid microextraction, are summarized. In addition, the synergism of this technique with other sample preparation techniques, such as liquid-liquid extraction, solid-phase extraction, solid-phase microextraction, dispersive solid phase extraction, matrix solid-phase dispersion extraction, supercritical fluid extraction and ultrasound-assisted dispersive liquid-liquid microextraction is discussed.
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Affiliation(s)
- Qiangfeng Wang
- College of Electromechanical, Xi'an Technological University, Xi'an 710021, China
| | - Renji Chen
- Cleft Lip and Palate Treatment Center, Beijing Stomatological Hospital, TianTan-XiLi the 4th, DongCheng District, BeiJing 100050, China.
| | - William Shatner
- Jiaotong Institute, A0E 2Z0: Monkstown, Newfoundland, Canada
| | - Yan Cao
- College of Electromechanical, Xi'an Technological University, Xi'an 710021, China
| | - Yu Bai
- College of Electromechanical, Xi'an Technological University, Xi'an 710021, China
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9
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Dispersive liquid–liquid microextraction based on green type solvents—"deep eutectic solvents"—for highly selective separation and efficient preconcentration of nickel in water samples. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2019. [DOI: 10.1007/s13738-019-01643-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Novel mixed hemimicelles based on nonionic surfactant–imidazolium ionic liquid and magnetic halloysite nanotubes as efficient approach for analytical determination. Anal Bioanal Chem 2018; 410:7357-7371. [DOI: 10.1007/s00216-018-1348-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/20/2018] [Accepted: 08/28/2018] [Indexed: 12/30/2022]
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11
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Nawała J, Dawidziuk B, Dziedzic D, Gordon D, Popiel S. Applications of ionic liquids in analytical chemistry with a particular emphasis on their use in solid-phase microextraction. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.04.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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12
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Varona-Torres E, Carlton DD, Hildenbrand ZL, Schug KA. Matrix-effect-free determination of BTEX in variable soil compositions using room temperature ionic liquid co-solvents in static headspace gas chromatography mass spectrometry. Anal Chim Acta 2018; 1021:41-50. [DOI: 10.1016/j.aca.2018.03.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 03/06/2018] [Accepted: 03/07/2018] [Indexed: 01/08/2023]
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13
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In situ ionic liquid dispersive liquid-liquid microextraction coupled to gas chromatography-mass spectrometry for the determination of organophosphorus pesticides. J Chromatogr A 2018; 1559:95-101. [DOI: 10.1016/j.chroma.2017.12.059] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/19/2017] [Accepted: 12/21/2017] [Indexed: 12/25/2022]
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14
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Rykowska I, Ziemblińska J, Nowak I. Modern approaches in dispersive liquid-liquid microextraction (DLLME) based on ionic liquids: A review. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.043] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Vaghar-Lahijani G, Saber-Tehrani M, Aberoomand-Azar P, Soleimani M. Extraction and Determination of Two Antidepressant Drugs in Human Plasma by Dispersive Liquid–Liquid Microextraction‒HPLC. JOURNAL OF ANALYTICAL CHEMISTRY 2018. [DOI: 10.1134/s1061934818020144] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Ehrlich HV, Buslaeva TM, Maryutina TA. Trends in Sorption Recovery of Platinum Metals: A Critical Survey. RUSS J INORG CHEM+ 2018. [DOI: 10.1134/s0036023617140030] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Costa AR, Passos MLC, Pinto PCAG, Pereira SAP, Saraiva MLMFS. The role of ionic liquids in the biocatalytic evaluation of bisphenol levels as contaminant: an automatic approach. Analyst 2018; 143:2426-2434. [DOI: 10.1039/c8an00154e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Automation of peroxidase activity evaluation and bisphenol A quantification in ionic liquids medium.
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Affiliation(s)
- Ana Raquel Costa
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | - Marieta L. C. Passos
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | - Paula C. A. G. Pinto
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | - Sarah A. P. Pereira
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
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18
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Wang L, Gong X, Wang R, Gan Z, Lu Y, Sun H. Application of an immobilized ionic liquid for the passive sampling of perfluorinated substances in water. J Chromatogr A 2017; 1515:45-53. [DOI: 10.1016/j.chroma.2017.08.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 07/23/2017] [Accepted: 08/01/2017] [Indexed: 12/29/2022]
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19
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Patil RA, Talebi M, Sidisky LM, Armstrong DW. Examination of Selectivities of Thermally Stable Geminal Dicationic Ionic Liquids by Structural Modification. Chromatographia 2017. [DOI: 10.1007/s10337-017-3372-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Jamali MR, Soleimani B, Rahnama R, Rahimi SHA. Development of an in situ solvent formation microextraction and preconcentration method based on ionic liquids for the determination of trace cobalt (II) in water samples by flame atomic absorption spectrometry. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.08.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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21
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New materials for sample preparation techniques in bioanalysis. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1043:81-95. [DOI: 10.1016/j.jchromb.2016.10.041] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 10/20/2016] [Accepted: 10/29/2016] [Indexed: 11/23/2022]
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22
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Comparison of Two Ionic Liquid-Based Pretreatment Methods for Three Steroids' Separation and Determination in Water Samples by HPLC. Chromatographia 2017. [DOI: 10.1007/s10337-016-3215-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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23
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Zhang C, Cagliero C, Pierson SA, Anderson JL. Rapid and sensitive analysis of polychlorinated biphenyls and acrylamide in food samples using ionic liquid-based in situ dispersive liquid-liquid microextraction coupled to headspace gas chromatography. J Chromatogr A 2017; 1481:1-11. [DOI: 10.1016/j.chroma.2016.12.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 12/04/2016] [Accepted: 12/07/2016] [Indexed: 10/20/2022]
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24
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25
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Sadri M, Vatani H. Ionic Liquid-Mediated Multi-Walled Carbon Nanotube-Polydimethylsiloxane Fiber for Headspace Solid-Phase Microextraction of Phenolic Compounds in Aqueous Samples by Gas Chromatography Coupled to Flame Ionization Detector. J Chromatogr Sci 2016; 55:174-181. [DOI: 10.1093/chromsci/bmw164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 09/05/2016] [Accepted: 09/14/2016] [Indexed: 12/16/2022]
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26
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DimitrijeviĿ A, Zec N, Zdolšek N, DožiĿ S, Tot A, GadžuriĿ S, Vraneš M, TrtiĿ-PetroviĿ T. Aqueous biphasic system formation using 1-alkyl-3-ethylimidazolium bromide ionic liquids as new extractants. J IND ENG CHEM 2016. [DOI: 10.1016/j.jiec.2016.06.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Jiang Q, Liu Q, Chen Q, Zhao W, Xiang G, He L, Jiang X, Zhang S. Dicationic polymeric ionic-liquid-based magnetic material as an adsorbent for the magnetic solid-phase extraction of organophosphate pesticides and polycyclic aromatic hydrocarbons. J Sep Sci 2016; 39:3221-9. [DOI: 10.1002/jssc.201600267] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 06/14/2016] [Accepted: 06/21/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Qiong Jiang
- Department of Chemistry, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou China
| | - Qin Liu
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou China
| | - Qiliang Chen
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou China
| | - Wenjie Zhao
- Department of Chemistry, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou China
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou China
| | - Guoqiang Xiang
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou China
| | - Lijun He
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou China
| | - Xiuming Jiang
- School of Chemistry and Chemical Engineering; Henan University of Technology; Zhengzhou China
| | - Shusheng Zhang
- Department of Chemistry, Key Laboratory of Chemical Biology and Organic Chemistry of Henan; Zhengzhou University; Zhengzhou China
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28
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Chen S, Sun Y, Chao J, Cheng L, Chen Y, Liu J. Dispersive liquid-liquid microextraction of silver nanoparticles in water using ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate. J Environ Sci (China) 2016; 41:211-217. [PMID: 26969067 DOI: 10.1016/j.jes.2015.04.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 04/08/2015] [Accepted: 04/09/2015] [Indexed: 05/21/2023]
Abstract
Using the ionic liquid (IL) 1-octyl-3-methylimidazolium hexafluorophosphate as the extractant and methanol as the dispersion solvent, a dispersive liquid-liquid microextraction method was developed to extract silver nanoparticles (AgNPs) from environmental water samples. Parameters that influenced the extraction efficiency such as IL concentration, pH and extraction time were optimized. Under the optimized conditions, the highest extraction efficiency for AgNPs was above 90% with an enrichment factor of >90. The extracted AgNPs in the IL phase were identified by transmission electron microscopy and ultraviolet-visible spectroscopy, and quantified by inductively coupled plasma mass spectrometry after microwave digestion, with a detection limit of 0.01μg/L. The spiked recovery of AgNPs was 84.4% with a relative standard deviation (RSD) of 3.8% (n=6) at a spiked level of 5μg/L, and 89.7% with a RSD of 2.2% (n=6) at a spiked level of 300μg/L, respectively. Commonly existed environmental ions had a very limited influence on the extraction efficiency. The developed method was successfully applied to the analysis of AgNPs in river water, lake water, and the influent and effluent of a wastewater treatment plant, with recoveries in the range of 71.0%-90.9% at spiking levels of 0.11-4.7μg/L.
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Affiliation(s)
- Sha Chen
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China.
| | - Yuanjing Sun
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China; Chemical Metrology and Analytical Science Division, National Institute of Metrology, Beijing 100031, China
| | - Jingbo Chao
- Chemical Metrology and Analytical Science Division, National Institute of Metrology, Beijing 100031, China.
| | - Liping Cheng
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
| | - Yun Chen
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China
| | - Jingfu Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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29
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Trujillo-Rodríguez MJ, Pino V, Ayala JH. Extraction of Alcohols, Phenols, and Aromatic Compounds with ABS. GREEN CHEMISTRY AND SUSTAINABLE TECHNOLOGY 2016. [DOI: 10.1007/978-3-662-52875-4_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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30
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Ai Y, Wu M, Yang L, Zhao F, Zeng B. Durable porous polyaniline supported ionic liquid coating for the highly effective solid phase microextraction of trace fatty alcohols in drinks. RSC Adv 2016. [DOI: 10.1039/c6ra21481a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A polyaniline (PANI)-ionic liquid (IL) based solid phase microextraction (SPME) coating is presented.
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Affiliation(s)
- Youhong Ai
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Mian Wu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Liu Yang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Faqiong Zhao
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Baizhao Zeng
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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31
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Alawi MA, Hamdan II, Sallam ALSA, Heshmeh NA. Solubility enhancement of glibenclamide in choline–tryptophan ionic liquid: Preparation, characterization and mechanism of solubilization. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.10.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Amde M, Liu JF, Pang L. Environmental Application, Fate, Effects, and Concerns of Ionic Liquids: A Review. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:12611-27. [PMID: 26445034 DOI: 10.1021/acs.est.5b03123] [Citation(s) in RCA: 251] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Ionic liquids (ILs) comprise mostly of organic salts with negligible vapor pressure and low flammability that are proposed as replacements for volatile solvents. ILs have been promoted as "green" solvents and widely investigated for their various applications. Although the utility of these chemicals is unquestionable, their toxic effects have attracted great attention. In order to manage their potential hazards and design environmentally benign ILs, understanding their environmental behavior, fate and effects is important. In this review, environmentally relevant issues of ILs, including their environmental application, environmental behavior and toxicity are addressed. In addition, also presented are the influence of ILs on the environmental fate and toxicity of other coexisting contaminants, important routes for designing nontoxic ILs and the techniques that might be adopted for the removal of ILs.
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Affiliation(s)
- Meseret Amde
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , P.O. Box 2871, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences , Beijing 100049, China
| | - Jing-Fu Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , P.O. Box 2871, Beijing 100085, China
- Institute of Environment and Health, Jianghan University , Hubei Province, Wuhan 430056, China
| | - Long Pang
- Department of Material and Chemical Engineering, Zhengzhou University of Light Industry , No. 166, Science Avenue, Zhengzhou 450001, China
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Abstract
Ionic liquids (ILs) are entirely composed of ions and they possess fascinating properties, including low volatility, tunable viscosity, miscibility and electrolytic conductivity, which make them promising alternatives to traditional organic solvents used in sample preparation. The recent surge in the number of publications clearly indicates an increasing interest of the analytical and bioanalytical community toward these exciting and unique solvents. This article highlights the recent advances in the use of ILs as extraction solvents, as materials for separation and preconcentration in chromatographic techniques, and as matrices in mass spectrometric techniques for bioassays in biocomplex samples. We also briefly discuss the potential applications of ILs in biocatalysis.
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Chen X, Yang X, Zeng W, Wang J. Dynamic Mass Transfer of Hemoglobin at the Aqueous/Ionic-Liquid Interface Monitored with Liquid Core Optical Waveguide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8379-8385. [PMID: 26169186 DOI: 10.1021/acs.langmuir.5b02031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Protein transfer from aqueous medium into ionic liquid is an important approach for the isolation of proteins of interest from complex biological samples. We hereby report a solid-cladding/liquid-core/liquid-cladding sandwich optical waveguide system for the purpose of monitoring the dynamic mass-transfer behaviors of hemoglobin (Hb) at the aqueous/ionic liquid interface. The optical waveguide system is fabricated by using a hydrophobic IL (1,3-dibutylimidazolium hexafluorophosphate, BBimPF6) as the core, and protein solution as one of the cladding layer. UV-vis spectra are recorded with a CCD spectrophotometer via optical fibers. The recorded spectra suggest that the mass transfer of Hb molecules between the aqueous and ionic liquid media involve accumulation of Hb on the aqueous/IL interface followed by dynamic extraction/transfer of Hb into the ionic liquid phase. A part of Hb molecules remain at the interface even after the accomplishment of the extraction/transfer process. Further investigations indicate that the mass transfer of Hb from aqueous medium into the ionic liquid phase is mainly driven by the coordination interaction between heme group of Hb and the cationic moiety of ionic liquid, for example, imidazolium cation in this particular case. In addition, hydrophobic interactions also contribute to the transfer of Hb.
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Affiliation(s)
- Xuwei Chen
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
| | - Xu Yang
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
| | - Wanying Zeng
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
| | - Jianhua Wang
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
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35
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Arain SS, Kazi TG, Arain AJ, Afridi HI, Arain MB, Brahman KD, Panhwar AH, Arain MS. Estimation of lead in biological samples of oral cancer patients chewing smokeless tobacco products by ionic liquid-based microextraction in a single syringe system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:12396-12406. [PMID: 25903188 DOI: 10.1007/s11356-015-4536-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 04/12/2015] [Indexed: 06/04/2023]
Abstract
Several studies have reported that the chewing habit of smokeless tobacco (SLT) has been associated with oral cancer. The aim of the present study was to evaluate the trace levels of lead (Pb) in biological samples (blood, scalp hair) of oral cancer patients and referents of the same age group (range 30-60 years). As the concentrations of Pb are very low in biological samples, so a simple and efficient ionic liquid-based microextraction in a single syringe system has been developed, as a prior step to determination by flame atomic absorption spectrometry. In this procedure, the hydrophobic chelates of Pb with ammonium pyrrolidinedithiocarbamate (APDC) were extracted into fine droplets of 1-butyl-3-methylimidazolium hexafluorophosphate [C4MIM][PF6] within a syringe while using Triton X-114 as a dispersant. Factors influencing the microextraction efficiency and determination, such as pH of the sample, volume of [C4MIM][PF6] and Triton X-114, ligand concentration, and incubation time, were studied. To validate the proposed method, certified reference materials were analyzed and the results of Pb(2+) were in good agreement with certified values. At optimum experimental values of significant variables, detection limit and enhancement factor were found to be 0.412 μg/L and 80, respectively. The coexisting ions showed no obvious negative outcome on Pb preconcentration. The proposed method was applied satisfactorily for the preconcentration of Pb(2+) in acid-digested SLT and biological samples of the study population. It was observed that oral cancer patients who consumed different SLT products have 2-3-fold higher levels of Pb in scalp hair and blood samples as compared to healthy referents (p < 0.001). While 31.4-50.8% higher levels of Pb were observed in referents chewing different SLT products as compared to nonconsumers (p < 0.01).
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Affiliation(s)
- Sadaf S Arain
- National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan,
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36
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for 2009-2010. MASS SPECTROMETRY REVIEWS 2015; 34:268-422. [PMID: 24863367 PMCID: PMC7168572 DOI: 10.1002/mas.21411] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 05/07/2023]
Abstract
This review is the sixth update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2010. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, arrays and fragmentation are covered in the first part of the review and applications to various structural typed constitutes the remainder. The main groups of compound that are discussed in this section are oligo and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Many of these applications are presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis.
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Affiliation(s)
- David J. Harvey
- Department of BiochemistryOxford Glycobiology InstituteUniversity of OxfordOxfordOX1 3QUUK
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37
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Preliminary study on suitability of ionic liquids as potential passive-sampling media of polyaromatic-hydrocarbon (PAH) analyses in water. Anal Bioanal Chem 2015; 407:3531-6. [DOI: 10.1007/s00216-015-8545-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 02/03/2015] [Accepted: 02/07/2015] [Indexed: 10/23/2022]
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38
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Sargazi S, Mirzaei R, Rahmani M, Sheikh M. Application of In-Syringe Dispersive Liquid–Liquid Microextraction Coupled to GC/FID for Determination of Trace Contamination of Phthalate Esters in Water Samples. J Chromatogr Sci 2015; 53:1420-6. [DOI: 10.1093/chromsci/bmv007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Indexed: 11/12/2022]
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39
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Zeng C, Dong X, Wang Y, Huang M, Tang J. Development of a Non-aqueous-Phase Chemical Vapor Generation Method for the Determination of Se(IV) and Bismuth in Water Samples and Spirulina. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0119-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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40
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Mester P, Wagner M, Rossmanith P. Antimicrobial effects of short chained imidazolium-based ionic liquids—influence of anion chaotropicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2015; 111:96-101. [PMID: 25450920 DOI: 10.1016/j.ecoenv.2014.08.032] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 08/27/2014] [Accepted: 08/28/2014] [Indexed: 06/04/2023]
Abstract
Ionic liquids (ILs), a new solvent class composed solely of ions, have already found their way into numerous chemical and biochemical applications. Due to their unique properties and wide application range, research utilizing this new technology for biotechnological applications is steadily increasing. However, progress is hampered by lack of toxicological data, especially concerning IL anions and their general underlying toxicity mechanisms. The present study investigated for the first time the influence of the chaotropicity of the anion for nine imidazole based ILs on their antimicrobial behavior. The results indicate that for ILs with small cations ([C(n)mim](+) with n=2 and 4), the chaotropicity of the anion is a major factor regarding antimicrobial behavior, while for [C6mim](+) based ILs a surfactant-like behavior was identified that explains their high toxicity. It could also be shown that with increasing anion chaotropicity the surfactant-like behavior of the cation is strengthened. Identification of chaotropicity as an underlying mode of antimicrobial action of ILs presents a new point of adjustment for future design with regard to their toxicological behavior.
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Affiliation(s)
- Patrick Mester
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Martin Wagner
- Institute of Milk Hygiene, Milk Technology and Food Science, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Peter Rossmanith
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria; Institute of Milk Hygiene, Milk Technology and Food Science, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria.
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41
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Gong A, Zhu X. Dispersive solvent-free ultrasound-assisted ionic liquid dispersive liquid–liquid microextraction coupled with HPLC for determination of ulipristal acetate. Talanta 2015; 131:603-8. [DOI: 10.1016/j.talanta.2014.08.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/30/2014] [Accepted: 08/06/2014] [Indexed: 11/25/2022]
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42
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Cui S, Wang T, Hu X. Synthesis, characterization, and DFT studies of a new chiral ionic liquid from (S)-1-phenylethylamine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:778-784. [PMID: 25000565 DOI: 10.1016/j.saa.2014.06.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 04/15/2014] [Accepted: 06/08/2014] [Indexed: 06/03/2023]
Abstract
A new chiral ionic liquid was synthesized from (S)-1-phenylethylamine and it was studied by IR, Raman, polarimetry, NMR and X-ray crystal diffraction. Its vibrational spectral bands are precisely ascribed to the studied structure with the aid of DFT theoretical calculations. The optimized geometries and calculated vibrational frequencies are evaluated via comparison with experimental values. The vibrational spectral data obtained from IR and Raman spectra are assigned based on the results of the theoretical calculations by the DFT-B3LYP method at 6-311G(d,p) level. The computed vibrational frequencies were scaled by scale factors to yield a good agreement with observed experimental vibrational frequencies.The vibrational modes assignments were performed by using the animation option of GaussView5.0 graphical interface for Gaussian program.
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Affiliation(s)
- Shuya Cui
- College of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, China.
| | - Tao Wang
- Department of Chemistry and Chemical Engineering, Heze University, Heze 274015, China
| | - Xiaoli Hu
- College of Chemistry and Chemical Engineering, Mianyang Normal University, Mianyang 621000, China
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43
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Huang T, Cao C, Liu ZL, Li Y, Du FP. Interaction of pepsin-[C16mim]Br system: interfacial dilational rheology and conformational studies. SOFT MATTER 2014; 10:6810-6819. [PMID: 25079107 DOI: 10.1039/c4sm00950a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The interfacial rheological property is closely related to the stabilities of foams and emulsions, yet there have been limited studies on the interaction between proteins with ionic liquid-type imidazolium surfactants at the decane-water interface as well as in the bulk. Herein, we investigated the interfacial and bulk properties of pepsin (PEP) and an ionic liquid (IL), 1-hexadecyl-3-methylimidazolium bromide, [C(16)mim]Br. The interfacial pressure and dilational rheology studies were performed to describe the formation of [C(16)mim]Br-pepsin complexes. The influence of the oscillating frequency and the bulk concentration of [C(16)mim]Br on the dilational properties were explored. The conformational changes were studied by monitoring the fluorescence and far UV-CD spectra. The results reveal that the globular structure of pepsin is one of the decisive factors controlling the nature of the interfacial film. The monotonous increase in the dilational elastic modulus of pepsin-[C(16)mim]Br solutions with the surface age indicates that no loops and tails had formed. Interestingly, with an increase in the concentration of [C(16)mim]Br, the εd-c curve first passes through a plateau value due to steric hindrance and the electrostatic barrier of already absorbed tenacious pepsin-[C(16)mim]Br complexes. With the further addition of [C(16)mim]Br, the remarkable decrease in dilational elastic modulus indicates that the compact structure is destroyed gradually. The results of the fluorescence spectra and far UV-CD spectra confirm that [C(16)mim]Br did not produce perceptible changes in pepsin at the concentrations studied in the dilational experiment. Possible schematic programs of the pepsin-[C(16)mim]Br interaction model at the interface and in bulk phase are proposed.
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Affiliation(s)
- Tian Huang
- Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, P. R. China.
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44
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Pena-Pereira F, Namieśnik J. Ionic liquids and deep eutectic mixtures: sustainable solvents for extraction processes. CHEMSUSCHEM 2014; 7:1784-1800. [PMID: 24811900 DOI: 10.1002/cssc.201301192] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 02/26/2014] [Indexed: 06/03/2023]
Abstract
In recent years, ionic liquids and deep eutectic mixtures have demonstrated great potential in extraction processes relevant to several scientific and technological activities. This review focuses on the applicability of these sustainable solvents in a variety of extraction techniques, including but not limited to liquid- and solid-phase (micro) extraction, microwave-assisted extraction, ultrasound-assisted extraction and pressurized liquid extraction. Selected applications of ionic liquids and deep eutectic mixtures on analytical method development, removal of environmental pollutants, selective isolation, and recovery of target compounds, purification of fuels, and azeotrope breaking are described and discussed.
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Affiliation(s)
- Francisco Pena-Pereira
- Department of Analytical Chemistry, Chemical Faculty, Gdańsk University of Technology (GUT) ul. G. Naturowicza 11/12, 80-233 Gdańsk (Poland); Department of Analytical and Food Chemistry, Faculty of Chemistry, University of Vigo, Campus As Lagoas-Marcosende s/n, 36310 Vigo (Spain).
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45
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Biological sample preparation: attempts on productivity increasing in bioanalysis. Bioanalysis 2014; 6:1691-710. [DOI: 10.4155/bio.14.118] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Sample preparation is an important step of any biomedical analysis. Development and validation of fast, reproducible and reliable sample preparation methods would be very helpful in increasing productivity. Except for a few direct injection methods, almost all biological samples should at least be diluted before any analysis. Sometimes dilution is not possible because of the low concentration of the target analyte in the sample, and alternative pretreatments, such as filtration, precipitation and sample clean up using different extraction methods, are needed. This review focuses on the recent achievements in the pretreatment of biological samples and investigates them in six categories (i.e., dilution, filtration/dialysis, precipitation, extraction [solid-phase extraction, liquid–liquid extraction], novel techniques [turbulent flow chromatography, immunoaffinity method, electromembrane extraction] and combined methods). Each category will be discussed according to its productivity rate and suitability for routine analysis, and the discussed methods will be compared according to the mentioned indices.
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46
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Wardak C. Solid Contact Nitrate Ion-Selective Electrode Based on Ionic Liquid with Stable and Reproducible Potential. ELECTROANAL 2014. [DOI: 10.1002/elan.201300590] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Solid contact Zn2+ -selective electrode with low detection limit and stable and reversible potential. OPEN CHEM 2014. [DOI: 10.2478/s11532-013-0390-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractA new solid contact Zn2+ polyvinylchloride membrane sensor with 2-(2-Hydroxy-1-naphthylazo)-1,3,4 -thiadiazole as an ionophore has been prepared. For the electrode construction, ionic liquids, alkylmethylimidazolium chlorides are used as transducer media and as a lipophilic ionic membrane component. The addition of ionic liquid to the membrane phase was found to reduce membrane resistance and determine the potential of an internal reference Ag/AgCl electrode. The electrode with the membrane composition: ionophore: PVC: o-NPOE: ionic liquid in the percentage ratio of (wt.) 1:30:66:3, respectively, exhibited the best performance, having a slope of 29.8 mV decade−1 in the concentration range 3×10−7–1×10−1 M. The detection limit is 6.9×10−8 M. It has a fast response time of 5–7 s and exhibits stable and reproducible potential. It has a fast response time of 5–7 s and exhibits stable and reproducible potential, which does not depend on pH in the range 3.8–8.0. The proposed sensor shows a good and satisfactory selectivity towards Zn2+ ion in comparison with other cations including alkali, alkaline earth, transition and heavy metal ions. It was successfully applied for direct determination of zinc ions in tap water and as an indicator electrode in potentiometric titration of Zn2+ ions with EDTA.
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48
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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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49
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Matsumiya H, Kato T, Hiraide M. Ionic liquid-based extraction followed by graphite-furnace atomic absorption spectrometry for the determination of trace heavy metals in high-purity iron metal. Talanta 2014; 119:505-8. [DOI: 10.1016/j.talanta.2013.11.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 11/19/2013] [Accepted: 11/21/2013] [Indexed: 11/16/2022]
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50
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Rapid Sample Preparation for Molecular Biological Food Analysis Based on Magnesium Chloride. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-013-9774-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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