1
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Gritti F, Chen EY, Datta SS. Harnessing an elastic flow instability to improve the kinetic performance of chromatographic columns. J Chromatogr A 2024; 1735:465326. [PMID: 39236358 DOI: 10.1016/j.chroma.2024.465326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2024] [Revised: 08/28/2024] [Accepted: 08/29/2024] [Indexed: 09/07/2024]
Abstract
Despite decades of research and development, the optimal efficiency of slurry-packed HPLC columns is still hindered by inherent long-range flow heterogeneity from the wall to the central bulk region of these columns. Here, we show an example of how this issue can be addressed through the straightforward addition of a semidilute amount (500 ppm) of a large, flexible, synthetic polymer (18 MDa partially hydrolyzed polyacrylamide, HPAM) to the mobile phase (1% NaCl aqueous solution, hereafter referred to as "brine") during operation of a 4.6 mm × 300 mm column packed with 10μm BEHTM 125 Å particles. Addition of the polymer imparts elasticity to the mobile phase, causing the flow in the interparticle pore space to become unstable above a threshold flow rate. We verify the development of this elastic flow instability using pressure drop measurements of the friction factor versus Reynolds number. In prior work, we showed that this flow instability is characterized by large spatiotemporal fluctuations in the pore-scale flow velocities that may promote analyte dispersion across the column. Axial dispersion measurements of the quasi non-retained tracer thiourea confirm this possibility: they reveal that operating above the onset of the instability improves column efficiency by greater than 100%. These experiments thereby suggest that elastic flow instabilities can be harnessed to mitigate the negative impact of trans-column flow heterogeneities on the efficiency of slurry-packed HPLC columns. While this approach has its own inherent limitations and constraints, our results lay the groundwork for future targeted development of polymers that can impart elasticity when dissolved in commonly used liquid chromatography mobile phases, and can thereby generate elastic flow instabilities to help improve the resolution of HPLC columns.
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Affiliation(s)
- Fabrice Gritti
- Waters Corporation, Instrument/Core Research/Fundamental, 34 Maple Street, Milford, MA, 01757, USA.
| | - Emily Y Chen
- Department of Chemical and Biological Engineering, Princeton University, 41 Olden Street, Princeton, NJ, 08544, USA
| | - Sujit S Datta
- Department of Chemical and Biological Engineering, Princeton University, 41 Olden Street, Princeton, NJ, 08544, USA.
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2
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A cuboid chromatography device having short bed-height gives better protein separation at a significantly lower pressure drop than a taller column having the same bed-volume. J Chromatogr A 2021; 1647:462167. [PMID: 33962076 DOI: 10.1016/j.chroma.2021.462167] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/07/2021] [Accepted: 04/12/2021] [Indexed: 11/20/2022]
Abstract
Simultaneously reducing the bed-height and increasing the area of cross-section, while keeping the bed-volume the same, would substantially reduce the pressure drop across a process chromatography column. This would minimize problems such as resin compaction and non-uniformity in column packing, which are commonly faced when using soft chromatographic media. However, the increase in macroscale convective dispersion due to the increase in column diameter, and the resultant loss in resolution would far outweigh any potential benefit. Cuboid-packed bed devices have lower macroscale convective dispersion compared to their equivalent cylindrical columns. In this paper, we discuss how and why a flat cuboid chromatography device having a short bed-height gives better protein separation, at a significantly lower pressure drop, than a taller column having the same bed-volume. First, we explored this option based on computational fluid dynamic (CFD) simulations. Depending on the flow rate, the pressure drop across the flat cuboid device was lower than that in the tall column by a factor of 6.35 to 6.4 (i.e. less than 1/6th the pressure). The CFD results also confirmed that the macroscale convective dispersion within the flat cuboid device was significantly lower. Head-to-head separation experiments using a 1 mL flat cuboid device having a bed-height of 10 mm, and a 1 mL tall column having a bed-height of 25.8 mm, both packed with the same chromatographic media, were carried out. The number of theoretical plates per unit bed-height was on an average, around 2.5 time times greater with the flat cuboid device, while the total number of theoretical plates in the two devices were comparable. At any given superficial velocity, the height equivalent of a theoretical plate in the tall column was on an average, higher by a factor 2.5. Binary protein separation experiments showed that at any given flow rate, the resolution obtained using the flat cuboid device was significantly higher than that obtained with the tall column. This work opens up the possibility of designing and developing short bed-height chromatography devices for carrying out high-resolution biopharmaceutical purifications, at very low pressures.
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3
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Soliven A, Pareja L, Shalliker RA, Heinzen H, Pérez-Parada A. A parallel segmented flow column interface for microflow HPLC-MS separations for environmental organic contaminant analyses. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Experimental investigation of the retention factor dependency of eddy dispersion in packed bed columns and relation to knox's empirical model parameters. J Chromatogr A 2020; 1626:461339. [DOI: 10.1016/j.chroma.2020.461339] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/10/2020] [Accepted: 06/11/2020] [Indexed: 11/18/2022]
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5
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Vanderheyden Y, Broeckhoven K, Desmet G. Alternative method to study the radial dispersion in liquid chromatography columns. Part I: Theory. J Chromatogr A 2020; 1618:460868. [DOI: 10.1016/j.chroma.2020.460868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 10/25/2022]
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6
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Ghosh R, Chen G, Umatheva U, Gatt P. A flow distribution and collection feature for ensuring scalable uniform flow in a chromatography device. J Chromatogr A 2020; 1618:460892. [DOI: 10.1016/j.chroma.2020.460892] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/28/2019] [Accepted: 01/14/2020] [Indexed: 01/05/2023]
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7
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Vanderheyden Y, Broeckhoven K, Desmet G. Alternative method to study the radial dispersion in liquid chromatography columns. Part II: Experimental. J Chromatogr A 2020; 1618:460870. [PMID: 31987526 DOI: 10.1016/j.chroma.2020.460870] [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: 10/31/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 11/26/2022]
Abstract
The present contribution reports on the practical implementation and validation of a new experimental method to determine the radial dispersion (Drad) in packed bed liquid chromatography columns, as well as on the results obtained with it. A first important validation was that the measured Drad-values were independent of the applied relative central flow rate (varied from 25% to 57%). The obtained Drad-values did not vary significantly when changing the concentration of the injected tracer to check potential mass overloading effects (25, 50 or 75 ppm of tracer for the acetophenone measurements; 12.5 and 25 ppm of tracer for the toluene measurements). And yet another important validation step was the observation that the Drad-values clearly converged to the value of Deff for velocities going to zero, as physically and theoretically expected. Plotting the obtained results as a plot of Drad/Dmol versus the reduced velocity ν, a quasi-linear relationship is obtained. The slope of the curve (β = 0.38 and β = 0.46 for toluene and acetophenone, respectively) is significantly larger than the value that is most frequently cited in engineering literature. However, the obtained β-values and Drad/Dmol-values still fall within the broad range of β- and Drad/Dmol-values cited in literature.
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Affiliation(s)
- Yoachim Vanderheyden
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
| | - Ken Broeckhoven
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussels, Belgium
| | - Gert Desmet
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, 1050 Brussels, Belgium.
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8
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Umatheva U, Chen G, Ghosh R. Computational fluid dynamic (CFD) simulation of a cuboid packed-bed chromatography device. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Chen G, Gerrior A, Hale G, Ghosh R. Feasibility study of the fractionation of monoclonal antibody charge variants using a cuboid packed-bed device. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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10
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Soliven A, Rodriguez C, Pareja L, Colazzo M, Cesio V, Shalliker RA, Pérez-Parada A, Heinzen H. The parallel segmented flow column as an alternative front-end LC strategy for trace analyses. Microchem J 2019. [DOI: 10.1016/j.microc.2019.04.072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Vera C, Samuelsson J, Fornstedt T, Dennis G, Shalliker R. Visualisation of axial temperature gradients and heat transfer process of different solvent compositions in ultra high performance liquid chromatography using thermography. Microchem J 2019. [DOI: 10.1016/j.microc.2018.11.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Hayman DC, Shalliker RA. Renewing the performance of an expired particle packed column using active flow technology end fittings. J Chromatogr A 2019; 1586:145-148. [PMID: 30553505 DOI: 10.1016/j.chroma.2018.12.004] [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: 10/15/2018] [Revised: 11/20/2018] [Accepted: 12/03/2018] [Indexed: 10/27/2022]
Abstract
The performance of a particle packed column will inevitably degrade through use or misadventure. 'Active flow technology' (AFT) is known to greatly improve the performance of pristine columns, but is as of yet untested when used on columns that have degraded significantly. In this study AFT was used to regenerate a degraded column, where the reduced plate height and asymmetry values were 3.5 and 1.25 respectively. Once the AFT fittings were fitted to the column outlet and the flow segmentation ratio adjusted to 28% from the radial central exit port, the reduced plate height decreased to 2.0, and the bands were almost perfectly symmetrical with asymmetry factors equal to 1.04. Subsequently, the performance of the degraded column with AFT fittings provided performance that was comparable to that of a new conventional column fitted with traditional end fittings. The separation power of the degraded conventional column and that of the same column fitted with the AFT end fittings was then tested using the separation of oligostyrenes. In AFT mode, detection was undertaken at both the radial central exit port of the column and the peripheral exit port. The resulting separation that was achieved from the radial central exit port was superior to that observed on the conventional column, whereas, the separation observed from the peripheral port was very poor. It was subsequently determined that the reason for the degraded performance of the conventional column was a result of increased heterogeneity associated with the packing material in the wall region of the column.
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Affiliation(s)
- Drew C Hayman
- Australian Centre for Research on Separation Science (ACROSS), School of Science and Health, Western Sydney University, North Paramatta, NSW, 2050, Australia
| | - R Andrew Shalliker
- Australian Centre for Research on Separation Science (ACROSS), School of Science and Health, Western Sydney University, North Paramatta, NSW, 2050, Australia.
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13
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Effects of process parameters on the efficiency of chromatographic separations using a cuboid packed-bed device. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1086:23-28. [DOI: 10.1016/j.jchromb.2018.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 02/26/2018] [Accepted: 04/03/2018] [Indexed: 11/23/2022]
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14
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Acquaviva A, Jones A, Dennis GR, Shalliker RA, Soliven A. Phenolic profiling of complex tea samples via simultaneous multiplexed detection employing reaction flow HPLC columns and colorimetric post column derivatisation. Microchem J 2018. [DOI: 10.1016/j.microc.2018.01.044] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Gritti F. A stochastic view on column efficiency. J Chromatogr A 2018; 1540:55-67. [DOI: 10.1016/j.chroma.2018.02.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/01/2018] [Accepted: 02/04/2018] [Indexed: 12/20/2022]
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16
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On the relationship between radial structure heterogeneities and efficiency of chromatographic columns. J Chromatogr A 2018; 1533:112-126. [DOI: 10.1016/j.chroma.2017.12.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/11/2017] [Accepted: 09/23/2017] [Indexed: 11/18/2022]
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17
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Sharma NND, Dennis GR, Shalliker RA. Radial sample load distribution under overload conditions: Analytical scale columns. J LIQ CHROMATOGR R T 2017. [DOI: 10.1080/10826076.2017.1398172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Neil N. D. Sharma
- Australian Centre for Research on Separation Science, School of Science and Health, Western Sydney University, North Parramatta, NSW, Australia
| | - Gary R. Dennis
- Australian Centre for Research on Separation Science, School of Science and Health, Western Sydney University, North Parramatta, NSW, Australia
| | - R. Andrew Shalliker
- Australian Centre for Research on Separation Science, School of Science and Health, Western Sydney University, North Parramatta, NSW, Australia
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18
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Reising AE, Schlabach S, Baranau V, Stoeckel D, Tallarek U. Analysis of packing microstructure and wall effects in a narrow-bore ultrahigh pressure liquid chromatography column using focused ion-beam scanning electron microscopy. J Chromatogr A 2017; 1513:172-182. [DOI: 10.1016/j.chroma.2017.07.049] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 07/03/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
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19
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Ghosh R, Chen G. Mathematical modelling and evaluation of performance of cuboid packed-bed devices for chromatographic separations. J Chromatogr A 2017; 1515:138-145. [DOI: 10.1016/j.chroma.2017.07.088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/21/2017] [Accepted: 07/28/2017] [Indexed: 10/19/2022]
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20
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Ahmad IAH, Hrovat F, Soliven A, Clarke A, Boswell P, Tarara T, Blasko A. A 14 Parameter Study of UHPLC’s for Method Development Transfer and Troubleshooting. Chromatographia 2017. [DOI: 10.1007/s10337-017-3337-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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21
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Ghosh R. Using a box instead of a column for process chromatography. J Chromatogr A 2016; 1468:164-172. [DOI: 10.1016/j.chroma.2016.09.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 09/19/2016] [Accepted: 09/20/2016] [Indexed: 01/31/2023]
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22
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Astefanei A, Dapic I, Camenzuli M. Different Stationary Phase Selectivities and Morphologies for Intact Protein Separations. Chromatographia 2016; 80:665-687. [PMID: 28529348 PMCID: PMC5413533 DOI: 10.1007/s10337-016-3168-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/17/2016] [Accepted: 09/06/2016] [Indexed: 12/18/2022]
Abstract
The central dogma of biology proposed that one gene encodes for one protein. We now know that this does not reflect reality. The human body has approximately 20,000 protein-encoding genes; each of these genes can encode more than one protein. Proteins expressed from a single gene can vary in terms of their post-translational modifications, which often regulate their function within the body. Understanding the proteins within our bodies is a key step in understanding the cause, and perhaps the solution, to disease. This is one of the application areas of proteomics, which is defined as the study of all proteins expressed within an organism at a given point in time. The human proteome is incredibly complex. The complexity of biological samples requires a combination of technologies to achieve high resolution and high sensitivity analysis. Despite the significant advances in mass spectrometry, separation techniques are still essential in this field. Liquid chromatography is an indispensable tool by which low-abundant proteins in complex samples can be enriched and separated. However, advances in chromatography are not as readily adapted in proteomics compared to advances in mass spectrometry. Biologists in this field still favour reversed-phase chromatography with fully porous particles. The purpose of this review is to highlight alternative selectivities and stationary phase morphologies that show potential for application in top-down proteomics; the study of intact proteins.
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Affiliation(s)
- A. Astefanei
- Centre for Analytical Science in Amsterdam (CASA), Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - I. Dapic
- Centre for Analytical Science in Amsterdam (CASA), Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - M. Camenzuli
- Centre for Analytical Science in Amsterdam (CASA), Van’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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23
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Enke D, Gläser R, Tallarek U. Sol-Gel and Porous Glass-Based Silica Monoliths with Hierarchical Pore Structure for Solid-Liquid Catalysis. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201600049] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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24
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25
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Soliven A, Pravadali-Cekic S, Foley D, Pereira L, Dennis G, Cabrera K, Ritchie H, Edge T, Shalliker R. Using curtain flow second-generation silica monoliths to improve separations at pressures less than 400 bar. Microchem J 2016. [DOI: 10.1016/j.microc.2016.02.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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A Rapid Screening Analysis of Antioxidant Compounds in Native Australian Food Plants Using Multiplexed Detection with Active Flow Technology Columns. Molecules 2016; 21:E118. [PMID: 26805792 PMCID: PMC6273279 DOI: 10.3390/molecules21010118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/11/2016] [Accepted: 01/11/2016] [Indexed: 11/17/2022] Open
Abstract
Conventional techniques for identifying antioxidant and phenolic compounds in native Australian food plants are laborious and time-consuming. Here, we present a multiplexed detection technique that reduces analysis time without compromising separation performance. This technique is achieved using Active Flow Technology-Parallel Segmented Flow (AFT-PSF) columns. Extracts from cinnamon myrtle (Backhousia myrtifolia) and lemon myrtle (Backhousia citriodora) leaves were analysed via multiplexed detection using an AFT-PSF column with underivatised UV-VIS, mass spectroscopy (MS), and the 2,2-diphenyl-1-picrylhydrazyl (DPPH•) derivatisation for antioxidants as detection methods. A number of antioxidant compounds were detected in the extracts of each leaf extract.
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27
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Soliven A, Foley D, Pereira L, Pravadali-Cekic S, Dennis GR, Cabrera K, Ritchie H, Edge T, Shalliker RA. The performance of second generation silica monoliths, operating in parallel segmented flow mode. Microchem J 2016. [DOI: 10.1016/j.microc.2015.08.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Pravadali-Cekic S, Kocic D, Hua S, Jones A, Dennis GR, Shalliker RA. Tuning a Parallel Segmented Flow Column and Enabling Multiplexed Detection. J Vis Exp 2015:e53448. [PMID: 26710179 DOI: 10.3791/53448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Active flow technology (AFT) is new form of column technology that was designed to overcome flow heterogeneity to increase separation performance in terms of efficiency and sensitivity and to enable multiplexed detection. This form of AFT uses a parallel segmented flow (PSF) column. A PSF column outlet end-fitting consists of 2 or 4 ports, which can be multiplexed to connect up to 4 detectors. The PSF column not only allows a platform for multiplexed detection but also the combination of both destructive and non-destructive detectors, without additional dead volume tubing, simultaneously. The amount of flow through each port can also be adjusted through pressure management to suit the requirements of a specific detector(s). To achieve multiplexed detection using a PSF column there are a number of parameters which can be controlled to ensure optimal separation performance and quality of results; that is tube dimensions for each port, choice of port for each type of detector and flow adjustment. This protocol is intended to show how to use and tune a PSF column functioning in a multiplexed mode of detection.
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Affiliation(s)
| | - Danijela Kocic
- School of Science and Health, University of Western Sydney
| | - Stanley Hua
- School of Science and Health, University of Western Sydney
| | - Andrew Jones
- School of Science and Health, University of Western Sydney
| | - Gary R Dennis
- School of Science and Health, University of Western Sydney
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29
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Kocic D, Andrew Shalliker R. A new approach to live reaction monitoring using active flow technology in ultra-high-speed HPLC with mass spectral detection. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:1396-1399. [PMID: 26634974 DOI: 10.1002/jms.3711] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 09/21/2015] [Accepted: 09/22/2015] [Indexed: 06/05/2023]
Abstract
A new type of chromatography column referred to as a parallel segmented flow (PSF) column enables ultra-high-speed high-performance liquid chromatography-MS to be undertaken. This occurs because the separation efficiency obtained on PSF columns has been shown in prior studies to be superior to conventional columns, and the flow stream is split radially inside the outlet end fitting of the column, rather than in an axial post-column flow stream split. As a result, the flow through the column can be five times higher than the flow through the MS. In this work, the degradation of amino acids in dilute nitric acid was used to illustrate the process. Separations were obtained in less than 12 s, although the reinjection process was initiated 6 s after the previous injection. The degradation rate constant of tryptophan, in the presence of tyrosine and phenylalanine, was determined.
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Affiliation(s)
- Danijela Kocic
- Australian Centre for Research on Separation Science (ACROSS), School of Science and Health, University of Western Sydney (Parramatta), Sydney, NSW, Australia
| | - R Andrew Shalliker
- Australian Centre for Research on Separation Science (ACROSS), School of Science and Health, University of Western Sydney (Parramatta), Sydney, NSW, Australia
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30
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Using active flow technology columns for high through-put and efficient analyses: The drive towards ultra-high through-put high-performance liquid chromatography with mass spectral detection. J Chromatogr A 2015; 1421:60-7. [DOI: 10.1016/j.chroma.2015.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/01/2015] [Accepted: 09/02/2015] [Indexed: 11/24/2022]
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31
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Pravadali-Cekic S, Jones A, Kazarian AA, Paull B, Soliven A, Ritchie H, Camenzuli M, Dennis GR, Andrew Shalliker R. Using reaction flow chromatography for the analysis of amino acid: Derivatisation with fluorescamine reagent. Microchem J 2015. [DOI: 10.1016/j.microc.2015.02.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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32
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Kocic D, Pereira L, Edge T, Ritchie H, Conlan X, Shalliker R. Improving quantification using curtain flow chromatography columns in the analysis of labile compounds: A study on amino acids. J Chromatogr A 2015; 1375:76-81. [DOI: 10.1016/j.chroma.2014.11.078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 11/25/2014] [Accepted: 11/27/2014] [Indexed: 11/29/2022]
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33
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Hormann K, Tallarek U. Mass transport properties of second-generation silica monoliths with mean mesopore size from 5 to 25nm. J Chromatogr A 2014; 1365:94-105. [DOI: 10.1016/j.chroma.2014.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/03/2014] [Accepted: 09/03/2014] [Indexed: 10/24/2022]
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Soliven A, Foley D, Pereira L, Hua S, Edge T, Ritchie H, Dennis GR, Andrew Shalliker R. Improving the performance of narrow-bore HPLC columns using active flow technology. Microchem J 2014. [DOI: 10.1016/j.microc.2014.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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