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Bocian S, Dembek M, Kalisz O. Exploring the green frontier: Subcritical water chromatography for sustainable analytical practices. J Sep Sci 2024; 47:e2300873. [PMID: 38801758 DOI: 10.1002/jssc.202300873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 03/19/2024] [Accepted: 03/22/2024] [Indexed: 05/29/2024]
Abstract
Water in the subcritical state is characterized by properties significantly different from water under standard conditions. These include low viscosity, low surface tension, and a much lower dielectric constant, increasing the solubility of nonpolar substances. For this reason, it can provide an alternative solvent and be used in chromatographic techniques-subcritical water chromatography (SBWC). SBWC appears to be one of the greenest analytical techniques until we unravel chromatography with pure water at room temperature. The versatility of SBWC is explored through its applications in the separation and analysis of a wide range of compounds, including pharmaceuticals, natural products, etc. The use of subcritical water as a mobile phase requires suitable stable stationary phases and special apparatus. Still, it makes it possible to conduct analyses without using organic solvents. When using this technique, it is important to remember that it suits the analysis of thermally stable substances. The following work is a critical review of developments in SBWC.
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Affiliation(s)
- Szymon Bocian
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
| | - Mikołaj Dembek
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
| | - Oktawia Kalisz
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Torun, Poland
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2
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Eid SM, Farag MA, Bawazeer S. Underivatized Amino Acid Chromatographic Separation: Optimized Conditions for HPLC-UV Simultaneous Quantification of Isoleucine, Leucine, Lysine, Threonine, Histidine, Valine, Methionine, Phenylalanine, Tryptophan, and Tyrosine in Dietary Supplements. ACS OMEGA 2022; 7:31106-31114. [PMID: 36092579 PMCID: PMC9453785 DOI: 10.1021/acsomega.2c03228] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 07/29/2022] [Indexed: 05/04/2023]
Abstract
Amino acids (AAs) are considered as the building blocks of life. Unlike nonessential AAs, the human body cannot synthesize essential AAs and should be supplied in food or dietary supplements. The aim of the work is simultaneous HPLC-UV determination of 10 structurally related AAs without pre- or postderivatization in powdered dietary supplements (PDSs). This was challenging, especially because PDS has no standardized procedures for its quality control. HPLC-UV chromatograms of the 10 AAs were recorded using a gradient elution of the mobile phase on a CLC-C18 column at 225 nm. The elution started with 100% of phosphate buffer (pH 7.4, 10 mM) for 10 min; then, the concentration of acetonitrile increased linearly to reach 50% for another 15 min at room temperature. Good separation was achieved within a 25 min run time without pre- or postderivatization. The method was carefully validated according to the ICH guidelines over the linearity range of 100-200, 50-200, 20-150, 50-400, 20-250, 75-175, 50-250, 50-250, 50-300, and 5-100 μg/mL for l-lysine, l-threonine, l-histidine, l-valine, l-methionine, l-isoleucine, l-leucine, l-tyrosine, l-phenylalanine, and l-tryptophan, respectively, with mean recoveries ranges between 98.91 and 100.77. The method was found to be precise, and the relative standard deviation (RSD) was found to be between 0.28 and 1.92 with recoveries between 97.91 and 101.11. The method was found to be robust that resists deliberate changes in pH, flow rate, and mobile-phase percentages. It was successfully applied for the analysis of PDSs. The proposed method could be very useful for the quality control of the 10 structurally related AAs during their synthesis and for testing raw materials and pharmaceutical preparations.
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Affiliation(s)
- Sherif M. Eid
- Analytical
Chemistry Department, Faculty of Pharmacy, October 6 University, 6 October
City 12511, Giza, Egypt
- ,
| | - Mohamed A. Farag
- Pharmacognosy
Department, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | - Sami Bawazeer
- Department
of Pharmacognosy, Umm Al-Qura University,
Faculty of Pharmacy, Makkah 21421, Saudi Arabia
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3
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Zhang R, Ahmed A, Yu B, Cong H, Shen Y. Preparation, application and development of poly(ionic liquid) microspheres. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Samatya Ölmez S, Kökden D, Tuncel A. The Novel Polymethacrylate Based Hydrophilic Stationary Phase for Ion Chromatography. J Chromatogr Sci 2022:6568934. [DOI: 10.1093/chromsci/bmac034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 03/07/2022] [Accepted: 04/04/2022] [Indexed: 11/12/2022]
Abstract
Abstract
Ion chromatography is widely used as a useful and powerful tool for the analysis of anionic and cationic components found in waters and aqueous media. The performance and selectivity of ion chromatography are based on the stationary phase column packed material. In this study, it is aimed to develop new column material with quaternary ammonium functional group based on monodisperse polymeric particles for ion chromatography and to investigate their chromatographic performance. For the analysis of inorganic anions by ion chromatography, new stationary phases macroporous monodisperse particles based on 3-chloro-2-hydroxy propylmethacrylate-co-ethylene dimethacrylate are obtained as column packing material. 3-chloro-2-hydroxy propylmethacrylate and ethylene glycol dimethacrylate are transformed to porous monodisperse particle form by using glycidyl methacrylate as the seed latex and ethyl benzene as the porogen solvent via micro-suspension polymerization technique. Then macroporous monodisperse particles surface is functionalized by triethylamine so strong anion exchange is obtained for ion chromatography packing material. A series of stationary phases prepared from polymer particles containing different amounts of porogen solvent were tested. The results show that column packing material is successful to separate inorganic anions mixture such as F−, Cl−, NO2−, Br−, NO3− by using the carbonate and bicarbonate solutions as mobile phases.
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Affiliation(s)
| | - Didem Kökden
- Chemical Engineering Department, Hacettepe University, 06800, Beytepe, Ankara, Turkey
| | - Ali Tuncel
- Chemical Engineering Department, Hacettepe University, 06800, Beytepe, Ankara, Turkey
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5
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Steinbach JC, Fait F, Wagner S, Wagner A, Brecht M, Mayer HA, Kandelbauer A. Rational Design of Pore Parameters in Monodisperse Porous Poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) Particles Based on Response Surface Methodology. Polymers (Basel) 2022; 14:polym14030382. [PMID: 35160371 PMCID: PMC8840536 DOI: 10.3390/polym14030382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 11/16/2022] Open
Abstract
Monodisperse porous poly(glycidyl methacrylate-co–ethylene glycol dimethacrylate) particles are widely applied in different fields, as their pore properties can be influenced and functionalization of the epoxy group is versatile. However, the adjustment of parameters which control morphology and pore properties such as pore volume, pore size and specific surface area is scarcely available. In this work, the effects of the process factors monomer:porogen ratio, GMA:EDMA ratio and composition of the porogen mixture on the response variables pore volume, pore size and specific surface area are investigated using a face centered central composite design. Non-linear effects of the process factors and second order interaction effects between them were identified. Despite the complex interplay of the process factors, targeted control of the pore properties was possible. For each response a response surface model was derived with high predictive power (all R2predicted > 0.85). All models were tested by four external validation experiments and their validity and predictive power was demonstrated.
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Affiliation(s)
- Julia C. Steinbach
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany; (J.C.S.); (F.F.); (A.W.); (M.B.)
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany; (S.W.); (H.A.M.)
| | - Fabio Fait
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany; (J.C.S.); (F.F.); (A.W.); (M.B.)
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany; (S.W.); (H.A.M.)
| | - Stefanie Wagner
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany; (S.W.); (H.A.M.)
| | - Alexandra Wagner
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany; (J.C.S.); (F.F.); (A.W.); (M.B.)
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Marc Brecht
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany; (J.C.S.); (F.F.); (A.W.); (M.B.)
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Hermann A. Mayer
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany; (S.W.); (H.A.M.)
| | - Andreas Kandelbauer
- Process Analysis & Technology, Reutlingen Research Institute, Reutlingen University, Alteburgstraße 150, 72762 Reutlingen, Germany; (J.C.S.); (F.F.); (A.W.); (M.B.)
- Department of Material Sciences and Process Engineering (MAP), Institute of Wood Technology and Renewable Materials, University of Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Vienna, Austria
- Correspondence: ; Tel.: +49-(0)7-12-1271-2009
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6
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Stationary Phases for Green Liquid Chromatography. MATERIALS 2022; 15:ma15020419. [PMID: 35057141 PMCID: PMC8778826 DOI: 10.3390/ma15020419] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/14/2021] [Accepted: 12/30/2021] [Indexed: 01/27/2023]
Abstract
Industrial research, including pharmaceutical research, is increasingly using liquid chromatography techniques. This involves the production of large quantities of hazardous and toxic organic waste. Therefore, it is essential at this point to focus interest on solutions proposed by so-called “green chemistry”. One such solution is the search for new methods or the use of new materials that will reduce waste. One of the most promising ideas is to perform chromatographic separation using pure water, without organic solvents, as a mobile phase. Such an approach requires novel stationary phases or specific chromatographic conditions, such as an elevated separation temperature. The following review paper aims to gather information on stationary phases used for separation under purely aqueous conditions at various temperatures.
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7
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A review of the design of packing materials for ion chromatography. J Chromatogr A 2021; 1653:462313. [PMID: 34332319 DOI: 10.1016/j.chroma.2021.462313] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 05/30/2021] [Indexed: 12/15/2022]
Abstract
The development of ion chromatography has made remarkable progress in the past few decades, and it is now widely used for the analysis of common ions and organic compounds. Ion chromatography has many advantages, such as fast, high sensitivity, good selectivity and support for simultaneous analysis of multiple ionic compounds. In order to meet the high requirements of material analysis, new packing materials for ion chromatography with higher sensitivity and selectivity have been developed. In this paper, a lot of knowledge of ion chromatography is reviewed, and the development of ion chromatographic packings in recent years, especially in the last five years, is summarized.
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8
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Pączkowski P, Gawdzik B. Studies on Preparation, Characterization and Application of Porous Functionalized Glycidyl Methacrylate-Based Microspheres. MATERIALS 2021; 14:ma14061438. [PMID: 33809475 PMCID: PMC8002100 DOI: 10.3390/ma14061438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/11/2021] [Accepted: 03/12/2021] [Indexed: 01/05/2023]
Abstract
A one-step swelling and polymerization technique was used in the synthesis of porous glycidyl methacrylate (GMA) and ethylene glycol dimethacrylate (EGDMA) monodisperse polymeric microspheres. The polystyrene (PS) seed obtained in the dispersion polymerization was used as a shape template. The presence of epoxide rings in the chemical structure of microspheres enables their post-polymerization chemical modifications involving: the Diels-Alder reaction with sodium cyclopentadienide and maleic anhydride, the reaction with 4,4′-(bismaleimido)diphenylmethane, and the thiol-Michael reaction with methacryloyl chloride and 2-mercaptopropionic acid. Changing the reaction mixture composition—the amounts of crosslinking monomer and PS seed as well as the type and concentration of porogen porous microspheres of different porous structures were obtained. Their porous structures were characterized in the dry and swollen states. The copolymers obtained from the equimolar monomers mixture modified in the above way were applied as the column packing materials and tested in the reverse-phase HPLC (High-Performance Liquid Chromatography). A few factors influencing morphology and porous structure of microspheres were studied.
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9
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Xiao J, Lu Q, Cong H, Shen Y, Yu B. Microporous poly(glycidyl methacrylate- co-ethylene glycol dimethyl acrylate) microspheres: synthesis, functionalization and applications. Polym Chem 2021. [DOI: 10.1039/d1py00834j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
As a new kind of functional material, micron-sized porous polymer microspheres are a hot research topic in the field of polymer materials.
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Affiliation(s)
- Jingyuan Xiao
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Qingbiao Lu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Hailin Cong
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Youqing Shen
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Bing Yu
- Institute of Biomedical Materials and Engineering, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
- State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
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10
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Li S, Li Z, Zhang F, Geng H, Yang B. A polymer-based zwitterionic stationary phase for hydrophilic interaction chromatography. Talanta 2020; 216:120927. [DOI: 10.1016/j.talanta.2020.120927] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 12/29/2022]
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11
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Doctor N, Parker G, Vang K, Smith M, Kayan B, Yang Y. Stability and Extraction of Vanillin and Coumarin under Subcritical Water Conditions. Molecules 2020; 25:molecules25051061. [PMID: 32120972 PMCID: PMC7179162 DOI: 10.3390/molecules25051061] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/25/2020] [Accepted: 02/25/2020] [Indexed: 11/17/2022] Open
Abstract
In order to facilitate the development of the green subcritical water chromatography technique for vanillin and coumarin, the stability of the compounds under subcritical water conditions was investigated in this work. In addition, their extraction from natural products was also studied. The stability experiments were carried out by heating the mixtures of vanillin and water or coumarin and water at temperatures ranging from 100 °C to 250 °C, while subcritical water extractions (SBWE) of both analytes from vanilla beans and whole tonka beans were conducted at 100 °C to 200 °C. Analyte quantification for both stability and extraction studies was carried out by HPLC. After heating for 60 min, vanillin was found to be stable in water at temperatures up to 250 °C. While coumarin is also stable at lower temperatures such as 100 °C and 150 °C, it undergoes partial degradation after heating for 60 min at 200 °C and higher. The results of this stability study support green subcritical water chromatographic separation and extraction of vanillin and coumarin at temperatures up to 150 °C. The SBWE results revealed that the extraction efficiency of both analytes from vanilla beans and tonka beans is significantly improved with increasing temperature.
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Affiliation(s)
- Ninad Doctor
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA; (N.D.); (G.P.); (K.V.); (M.S.)
| | - Grayson Parker
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA; (N.D.); (G.P.); (K.V.); (M.S.)
| | - Katie Vang
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA; (N.D.); (G.P.); (K.V.); (M.S.)
| | - Melanie Smith
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA; (N.D.); (G.P.); (K.V.); (M.S.)
| | - Berkant Kayan
- Department of Chemistry, Arts and Sciences Faculty, Aksaray University, 68100 Aksaray, Turkey;
| | - Yu Yang
- Department of Chemistry, East Carolina University, Greenville, NC 27858, USA; (N.D.); (G.P.); (K.V.); (M.S.)
- Correspondence: ; Tel.: +1-252-328-9811; Fax: +1-252-3286210
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12
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13
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Yu CL, Bian F, Zhang SF, Xu X, Ren P, Wang FC, Zhang FA. Preparation of the monodispersed carboxyl-functionalized polymer microspheres with disproportionated rosin moiety and adsorption of methylene blue. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617418766774] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Carboxyl-functionalized polymer microspheres with a rosin moiety were prepared through dispersion polymerization using styrene, disproportionated rosin ester, and methylacrylic acid as raw materials. The effects of dispersion medium (ethanol/water) ratio, monomer mass proportion and initiator concentration on the polymer microspheres were studied. Scanning electron microscopy, laser particle size analysis, thermogravimetric analysis and Fourier transform infrared spectroscopy were used to characterize the microspheres, and their carboxyl contents were determined by the conductance titration method. The adsorption of methylene blue of the microspheres was also investigated. The results showed that rosin-based carboxyl-functionalized polymer microspheres were successfully synthesized. The microspheres exhibited smooth, spherical shapes with good monodispersity and high thermal stability. The carboxyl content of the microspheres prepared under optimum conditions was 0.089 mmol·g−1, with the average particle size approximately 950 nm. With increasing carboxyl contents of the polymer microspheres, their methylene blue adsorption capacities increased. The maximum methylene blue adsorption capacity of the microspheres was 59.55 mg·g−1 in the highest carboxyl content.
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Affiliation(s)
- Cai-Li Yu
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, China
| | - Feng Bian
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, China
| | - Shu-Fen Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China; College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, China
| | - Xu Xu
- College of Material Science and Engineering, Guilin University of Technology, Guilin, China
| | - Peng Ren
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, China
| | - Feng-Chang Wang
- College of Chemistry and Biology Engineering, Guilin University of Technology, Guilin, China
| | - Fa-Ai Zhang
- College of Material Science and Engineering, Guilin University of Technology, Guilin, China
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14
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Guo D, Lou C, Wang N, Chen M, Zhang P, Wu S, Zhu Y. Poly (styrene-divinyl benzene-glycidylmethacrylate) stationary phase grafted with poly amidoamine (PAMAM) dendrimers for rapid determination of phenylene diamine isomers in HPLC. Talanta 2017; 168:188-195. [DOI: 10.1016/j.talanta.2017.03.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/13/2017] [Accepted: 03/17/2017] [Indexed: 12/23/2022]
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15
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Yu B, Zhang H, Cong H, Gu C, Gao L, Yang B, Usman M. Diazoresin modified monodisperse porous poly(glycidylmethacrylate-co-divinylbenzene) microspheres as the stationary phase for high performance liquid chromatography. NEW J CHEM 2017. [DOI: 10.1039/c6nj04001b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diazoresin modified monodisperse porous PGMA–DVB microspheres were used as a novel tool for the separation and purification of the N-vinyl-1,2,4-triazole product from its by-product was developed.
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Affiliation(s)
- Bing Yu
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Hongbo Zhang
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Hailin Cong
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Chuantao Gu
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Lilong Gao
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Bo Yang
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
| | - Muhammad Usman
- Institute of Biomedical Materials and Engineering
- College of Chemistry and Chemical Engineering
- Qingdao University
- Qingdao 266071
- China
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16
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Liu J, Wang Y, Cheng H, Wang N, Wu S, Zhang P, Zhu Y. High-capacity anion exchangers based on poly (glycidylmethacrylate-divinylbenzene) microspheres for ion chromatography. Talanta 2016; 159:272-279. [DOI: 10.1016/j.talanta.2016.06.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 06/15/2016] [Accepted: 06/18/2016] [Indexed: 10/21/2022]
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17
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Affiliation(s)
| | - Ryota MORINAGA
- Graduate School of Science and Technology, Saitama University
| | - Shingo SAITO
- Graduate School of Science and Technology, Saitama University
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