Ion funnel device

Ibrahim, Yehia M.; Chen, Tsung-Chi; Harrer, Marques B.; Tang, Keqi; Smith, Richard D.

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A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
A23 - foods or foodstuffs
A24 - tobacco
A41 - wearing apparel
A42 - headwear
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A44 - haberdashery
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B61 - railways
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B63 - ships or other waterborne vessels
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C01 - inorganic chemistry
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D01 - natural or man-made threads or fibres
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Title: Ion funnel device

Abstract

An ion funnel device is disclosed. A first pair of electrodes is positioned in a first direction. A second pair of electrodes is positioned in a second direction. The device includes an RF voltage source and a DC voltage source. A RF voltage with a superimposed DC voltage gradient is applied to the first pair of electrodes, and a DC voltage gradient is applied to the second pair of electrodes.

Inventors:: Ibrahim, Yehia M.; Chen, Tsung-Chi; Harrer, Marques B.; Tang, Keqi; Smith, Richard D.

Issue Date:: 2017-11-21

Research Org.:: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1409832

Patent Number(s):: 9824874

Application Number:: 14/733,517

Assignee:: Battelle Memorial Institute (Richland, WA)

Patent Classifications (CPCs):: H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J49/066 - {Ion funnels}

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DOE Contract Number:: AC05-76RL01830

Resource Type:: Patent

Resource Relation:: Patent File Date: 2015 Jun 08

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; 24 POWER TRANSMISSION AND DISTRIBUTION

Citation Formats


                    Ibrahim, Yehia M., Chen, Tsung-Chi, Harrer, Marques B., Tang, Keqi, and Smith, Richard D. Ion funnel device.  United States: N. p., 2017. 
        Web.

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                    Ibrahim, Yehia M., Chen, Tsung-Chi, Harrer, Marques B., Tang, Keqi, & Smith, Richard D. Ion funnel device.  United States.

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                    Ibrahim, Yehia M., Chen, Tsung-Chi, Harrer, Marques B., Tang, Keqi, and Smith, Richard D. Tue .  
        "Ion funnel device".  United States.  https://www.osti.gov/servlets/purl/1409832.

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@article{osti_1409832,

  title        = {Ion funnel device},

  author       = {Ibrahim, Yehia M. and Chen, Tsung-Chi and Harrer, Marques B. and Tang, Keqi and Smith, Richard D.},

  abstractNote = {An ion funnel device is disclosed. A first pair of electrodes is positioned in a first direction. A second pair of electrodes is positioned in a second direction. The device includes an RF voltage source and a DC voltage source. A RF voltage with a superimposed DC voltage gradient is applied to the first pair of electrodes, and a DC voltage gradient is applied to the second pair of electrodes.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2017},

  month        = {11}

}

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Works referenced in this record:

Mass spectrometer
patent, October 2002

Inatsugu, Norihito; Waki, Hiroaki
US Patent Document 6,462,338
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6462338

Ion guides with RF diaphragm stacks
patent-application, April 2006

Stoermer, Carsten; Brekenfeld, Andreas; Wehkamp, Thomas
US Patent Application 11/243440; 20060076485
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20060076485

Mass Spectrometer
patent-application, January 2011

Nishiguchi, Masaru
US Patent Application 12/920306; 20110012017
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110012017

Ion Guide For Mass Spectrometers
patent-application, June 2011

Kim, Taeman; Parks, Melvin
US Patent Application 12/966744; 20110147584
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20110147584

Microchip and Wedge Ion Funnels and Planar Ion Beam Analyzers Using Same
patent-application, October 2012

Shvartsburg, Alexandre A.; Anderson, Gordon A.; Smith, Richard D.
US Patent Document 13/087100; 20120261570
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20120261570

Orthogonal Ion Injection Apparatus And Process
patent-application, November 2012

Kurulugama, Ruwan; Belov, Mikhail
US Patent Application 13/114869; 20120298853
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20120298853

Radio Frequency (RF) Ion Guide for Improved Performance in Mass Spectrometers
patent-application, July 2013

Perelman, Gershon; Ristroph, Trygve
US Patent Document 13/345392; 20130175440
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20130175440

Ion Guide and Electrode for Its Assembly
patent-application, July 2013

Zanon, Stephen; Splendore, Maurizio A.
US Patent Document 13/347754; 20130175441
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20130175441

A Wire Electrode Based Ion Guide Device
patent-application, July 2013

Ding, Li; Jiang, Gongyu; Sun, Wenjian
US Patent Document 13/357470; 20130187044
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20130187044

A simple electrospray interface based on a DC ion carpet
journal, October 2014

Anthony, Staci N.; Shinholt, Deven L.; Jarrold, Martin F.
International Journal of Mass Spectrometry, Vol. 371, p. 1-7
https://doi.org/10.1016/j.ijms.2014.06.007

Ion mobility spectrometry—mass spectrometry performance using electrodynamic ion funnels and elevated drift gas pressures
journal, July 2007

Baker, Erin Shammel; Clowers, Brian H.; Li, Fumin
Journal of the American Society for Mass Spectrometry, Vol. 18, Issue 7, p. 1176-1187
https://doi.org/10.1016/j.jasms.2007.03.031

Mass spectrometry with ion sources operating at atmospheric pressure
journal, January 1991

Bruins, A. P.
Mass Spectrometry Reviews, Vol. 10, Issue 1, p. 53-77
https://doi.org/10.1002/mas.1280100104

Enhanced Ion Utilization Efficiency Using an Electrodynamic Ion Funnel Trap as an Injection Mechanism for Ion Mobility Spectrometry
journal, February 2008

Clowers, Brian H.; Ibrahim, Yehia M.; Prior, David C.
Analytical Chemistry, Vol. 80, Issue 3, p. 612-623
https://doi.org/10.1021/ac701648p

Some Thoughts on Electrospray Ionization Mechanisms
journal, April 2011

Crotti, Sara; Seraglia, Roberta; Traldi, Pietro
European Journal of Mass Spectrometry, Vol. 17, Issue 2, p. 85-99
https://doi.org/10.1255/ejms.1129

Collisional focusing effects in radio frequency quadrupoles
journal, May 1992

Douglas, D. J.; French, J. B.
Journal of the American Society for Mass Spectrometry, Vol. 3, Issue 4, p. 398-408
https://doi.org/10.1016/1044-0305(92)87067-9

Electrospray ionization for mass spectrometry of large biomolecules
journal, October 1989

Fenn, J.; Mann, M.; Meng, C.
Science, Vol. 246, Issue 4926, p. 64-71
https://doi.org/10.1126/science.2675315

Electrospray ionization-principles and practice
journal, January 1990

Fenn, John B.; Mann, Matthias; Meng, Chin Kai
Mass Spectrometry Reviews, Vol. 9, Issue 1, p. 37-70
https://doi.org/10.1002/mas.1280090103

Simulation of Electric Potentials and Ion Motion in Planar Electrode Structures for Lossless Ion Manipulations (SLIM)
journal, September 2014

Garimella, Sandilya V. B.; Ibrahim, Yehia M.; Webb, Ian K.
Journal of The American Society for Mass Spectrometry, Vol. 25, Issue 11, p. 1890-1896
https://doi.org/10.1007/s13361-014-0976-y

Ion Mobility-Mass Spectrometry Analysis of Serum N-linked Glycans from Esophageal Adenocarcinoma Phenotypes
journal, October 2012

Gaye, M. M.; Valentine, S. J.; Hu, Y.
Journal of Proteome Research, Vol. 11, Issue 12, p. 6102-6110
https://doi.org/10.1021/pr300756e

Stacked-ring electrostatic ion guide
journal, January 1996

Guan, Shenheng; Marshall, Alan G.
Journal of the American Society for Mass Spectrometry, Vol. 7, Issue 1, p. 101-106
https://doi.org/10.1016/1044-0305(95)00605-2

Applications of ESI-MS in drug discovery: interrogation of noncovalent complexes
journal, July 2006

Hofstadler, Steven A.; Sannes-Lowery, Kristin A.
Nature Reviews Drug Discovery, Vol. 5, Issue 7, p. 585-595
https://doi.org/10.1038/nrd2083

Improving mass spectrometer sensitivity using a high-pressure electrodynamic ion funnel interface
journal, September 2006

Ibrahim, Yehia; Tang, Keqi; Tolmachev, Aleksey V.
Journal of the American Society for Mass Spectrometry, Vol. 17, Issue 9, p. 1299-1305
https://doi.org/10.1016/j.jasms.2006.06.005

Ion funnels for the masses: Experiments and simulations with a simplified ion funnel
journal, October 2005

Julian, Ryan R.; Mabbett, Sarah R.; Jarrold, Martin F.
Journal of the American Society for Mass Spectrometry, Vol. 16, Issue 10, p. 1708-1712
https://doi.org/10.1016/j.jasms.2005.06.012

Chemically Etched Open Tubular and Monolithic Emitters for Nanoelectrospray Ionization Mass Spectrometry
journal, November 2006

Kelly, Ryan T.; Page, Jason S.; Luo, Quanzhou
Analytical Chemistry, Vol. 78, Issue 22, p. 7796-7801
https://doi.org/10.1021/ac061133r

The ion funnel: Theory, implementations, and applications
journal, April 2009

Kelly, Ryan T.; Tolmachev, Aleksey V.; Page, Jason S.
Mass Spectrometry Reviews, Vol. 29, Issue 2, p. 294-312
https://doi.org/10.1002/mas.20232

A new, higher resolution, ion mobility mass spectrometer
journal, October 2009

Kemper, Paul R.; Dupuis, Nicholas F.; Bowers, Michael T.
International Journal of Mass Spectrometry, Vol. 287, Issue 1-3, p. 46-57
https://doi.org/10.1016/j.ijms.2009.01.012

An IMS−IMS Analogue of MS−MS
journal, June 2006

Koeniger, Stormy L.; Merenbloom, Samuel I.; Valentine, Stephen J.
Analytical Chemistry, Vol. 78, Issue 12, p. 4161-4174
https://doi.org/10.1021/ac051060w

Conformational Ordering of Biomolecules in the Gas Phase: Nitrogen Collision Cross Sections Measured on a Prototype High Resolution Drift Tube Ion Mobility-Mass Spectrometer
journal, February 2014

May, Jody C.; Goodwin, Cody R.; Lareau, Nichole M.
Analytical Chemistry, Vol. 86, Issue 4, p. 2107-2116
https://doi.org/10.1021/ac4038448

Ionization and transmission efficiency in an electrospray ionization—mass spectrometry interface
journal, September 2007

Page, Jason S.; Kelly, Ryan T.; Tang, Keqi
Journal of the American Society for Mass Spectrometry, Vol. 18, Issue 9, p. 1582-1590
https://doi.org/10.1016/j.jasms.2007.05.018

Characterization of an Improved Electrodynamic Ion Funnel Interface for Electrospray Ionization Mass Spectrometry
journal, August 1999

Shaffer, Scott A.; Tolmachev, Aleksey; Prior, David C.
Analytical Chemistry, Vol. 71, Issue 15, p. 2957-2964
https://doi.org/10.1021/ac990346w

An Ion Funnel Interface for Improved Ion Focusing and Sensitivity Using Electrospray Ionization Mass Spectrometry
journal, October 1998

Shaffer, Scott A.; Prior, David C.; Anderson, Gordon A.
Analytical Chemistry, Vol. 70, Issue 19, p. 4111-4119
https://doi.org/10.1021/ac9802170

Ultrasensitive Proteomics Using High-Efficiency On-Line Micro-SPE-NanoLC-NanoESI MS and MS/MS
journal, January 2004

Shen, Yufeng; Tolić, Nikola; Masselon, Christophe
Analytical Chemistry, Vol. 76, Issue 1, p. 144-154
https://doi.org/10.1021/ac030096q

Measuring the Resolving Power of Ion Mobility Spectrometers
journal, December 1994

Siems, William F.; Wu, Ching.; Tarver, Edward E.
Analytical Chemistry, Vol. 66, Issue 23, p. 4195-4201
https://doi.org/10.1021/ac00095a014

Analysis of Biomolecules Using Electrospray Ionization—Ion-Trap Mass Spectrometry and Laser Photodissociation
book, May 1996

Stephenson, Jr., James L.; Booth, Matthew M.; Boué, Stephen M.
Biochemical and Biotechnological Applications of Electrospray Ionization Mass Spectrometry, p. 512-564
https://doi.org/10.1021/bk-1995-0619.ch025

High-Sensitivity Ion Mobility Spectrometry/Mass Spectrometry Using Electrodynamic Ion Funnel Interfaces
journal, May 2005

Tang, Keqi; Shvartsburg, Alexandre A.; Lee, Hak-No
Analytical Chemistry, Vol. 77, Issue 10, p. 3330-3339
https://doi.org/10.1021/ac048315a

Characterization of Ion Dynamics in Structures for Lossless Ion Manipulations
journal, September 2014

Tolmachev, Aleksey V.; Webb, Ian K.; Ibrahim, Yehia M.
Analytical Chemistry, Vol. 86, Issue 18, p. 9162-9168
https://doi.org/10.1021/ac502054p

Experimental Evaluation and Optimization of Structures for Lossless Ion Manipulations for Ion Mobility Spectrometry with Time-of-Flight Mass Spectrometry
journal, September 2014

Webb, Ian K.; Garimella, Sandilya V. B.; Tolmachev, Aleksey V.
Analytical Chemistry, Vol. 86, Issue 18, p. 9169-9176
https://doi.org/10.1021/ac502055e

Mobility-Resolved Ion Selection in Uniform Drift Field Ion Mobility Spectrometry/Mass Spectrometry: Dynamic Switching in Structures for Lossless Ion Manipulations
journal, September 2014

Webb, Ian K.; Garimella, Sandilya V. B.; Tolmachev, Aleksey V.
Analytical Chemistry, Vol. 86, Issue 19, p. 9632-9637
https://doi.org/10.1021/ac502139e

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Title: Ion funnel device

Abstract

Citation Formats

Mass spectrometer patent, October 2002

Ion guides with RF diaphragm stacks patent-application, April 2006

Mass Spectrometer patent-application, January 2011

Ion Guide For Mass Spectrometers patent-application, June 2011

Microchip and Wedge Ion Funnels and Planar Ion Beam Analyzers Using Same patent-application, October 2012

Orthogonal Ion Injection Apparatus And Process patent-application, November 2012

Radio Frequency (RF) Ion Guide for Improved Performance in Mass Spectrometers patent-application, July 2013

Ion Guide and Electrode for Its Assembly patent-application, July 2013

A Wire Electrode Based Ion Guide Device patent-application, July 2013

A simple electrospray interface based on a DC ion carpet journal, October 2014

Ion mobility spectrometry—mass spectrometry performance using electrodynamic ion funnels and elevated drift gas pressures journal, July 2007

Mass spectrometry with ion sources operating at atmospheric pressure journal, January 1991

Enhanced Ion Utilization Efficiency Using an Electrodynamic Ion Funnel Trap as an Injection Mechanism for Ion Mobility Spectrometry journal, February 2008

Some Thoughts on Electrospray Ionization Mechanisms journal, April 2011

Collisional focusing effects in radio frequency quadrupoles journal, May 1992

Electrospray ionization for mass spectrometry of large biomolecules journal, October 1989

Electrospray ionization-principles and practice journal, January 1990

Simulation of Electric Potentials and Ion Motion in Planar Electrode Structures for Lossless Ion Manipulations (SLIM) journal, September 2014

Ion Mobility-Mass Spectrometry Analysis of Serum N-linked Glycans from Esophageal Adenocarcinoma Phenotypes journal, October 2012

Stacked-ring electrostatic ion guide journal, January 1996

Applications of ESI-MS in drug discovery: interrogation of noncovalent complexes journal, July 2006

Improving mass spectrometer sensitivity using a high-pressure electrodynamic ion funnel interface journal, September 2006

Ion funnels for the masses: Experiments and simulations with a simplified ion funnel journal, October 2005

Chemically Etched Open Tubular and Monolithic Emitters for Nanoelectrospray Ionization Mass Spectrometry journal, November 2006

The ion funnel: Theory, implementations, and applications journal, April 2009

A new, higher resolution, ion mobility mass spectrometer journal, October 2009

An IMS−IMS Analogue of MS−MS journal, June 2006

Conformational Ordering of Biomolecules in the Gas Phase: Nitrogen Collision Cross Sections Measured on a Prototype High Resolution Drift Tube Ion Mobility-Mass Spectrometer journal, February 2014

Ionization and transmission efficiency in an electrospray ionization—mass spectrometry interface journal, September 2007

Characterization of an Improved Electrodynamic Ion Funnel Interface for Electrospray Ionization Mass Spectrometry journal, August 1999

An Ion Funnel Interface for Improved Ion Focusing and Sensitivity Using Electrospray Ionization Mass Spectrometry journal, October 1998

Ultrasensitive Proteomics Using High-Efficiency On-Line Micro-SPE-NanoLC-NanoESI MS and MS/MS journal, January 2004

Measuring the Resolving Power of Ion Mobility Spectrometers journal, December 1994

Analysis of Biomolecules Using Electrospray Ionization—Ion-Trap Mass Spectrometry and Laser Photodissociation book, May 1996

High-Sensitivity Ion Mobility Spectrometry/Mass Spectrometry Using Electrodynamic Ion Funnel Interfaces journal, May 2005

Characterization of Ion Dynamics in Structures for Lossless Ion Manipulations journal, September 2014

Experimental Evaluation and Optimization of Structures for Lossless Ion Manipulations for Ion Mobility Spectrometry with Time-of-Flight Mass Spectrometry journal, September 2014

Mobility-Resolved Ion Selection in Uniform Drift Field Ion Mobility Spectrometry/Mass Spectrometry: Dynamic Switching in Structures for Lossless Ion Manipulations journal, September 2014

Mass spectrometer
patent, October 2002

Ion guides with RF diaphragm stacks
patent-application, April 2006

Mass Spectrometer
patent-application, January 2011

Ion Guide For Mass Spectrometers
patent-application, June 2011

Microchip and Wedge Ion Funnels and Planar Ion Beam Analyzers Using Same
patent-application, October 2012

Orthogonal Ion Injection Apparatus And Process
patent-application, November 2012

Radio Frequency (RF) Ion Guide for Improved Performance in Mass Spectrometers
patent-application, July 2013

Ion Guide and Electrode for Its Assembly
patent-application, July 2013

A Wire Electrode Based Ion Guide Device
patent-application, July 2013

A simple electrospray interface based on a DC ion carpet
journal, October 2014

Ion mobility spectrometry—mass spectrometry performance using electrodynamic ion funnels and elevated drift gas pressures
journal, July 2007

Mass spectrometry with ion sources operating at atmospheric pressure
journal, January 1991

Enhanced Ion Utilization Efficiency Using an Electrodynamic Ion Funnel Trap as an Injection Mechanism for Ion Mobility Spectrometry
journal, February 2008

Some Thoughts on Electrospray Ionization Mechanisms
journal, April 2011

Collisional focusing effects in radio frequency quadrupoles
journal, May 1992

Electrospray ionization for mass spectrometry of large biomolecules
journal, October 1989

Electrospray ionization-principles and practice
journal, January 1990

Simulation of Electric Potentials and Ion Motion in Planar Electrode Structures for Lossless Ion Manipulations (SLIM)
journal, September 2014

Ion Mobility-Mass Spectrometry Analysis of Serum N-linked Glycans from Esophageal Adenocarcinoma Phenotypes
journal, October 2012

Stacked-ring electrostatic ion guide
journal, January 1996

Applications of ESI-MS in drug discovery: interrogation of noncovalent complexes
journal, July 2006

Improving mass spectrometer sensitivity using a high-pressure electrodynamic ion funnel interface
journal, September 2006

Ion funnels for the masses: Experiments and simulations with a simplified ion funnel
journal, October 2005

Chemically Etched Open Tubular and Monolithic Emitters for Nanoelectrospray Ionization Mass Spectrometry
journal, November 2006

The ion funnel: Theory, implementations, and applications
journal, April 2009

A new, higher resolution, ion mobility mass spectrometer
journal, October 2009

An IMS−IMS Analogue of MS−MS
journal, June 2006

Conformational Ordering of Biomolecules in the Gas Phase: Nitrogen Collision Cross Sections Measured on a Prototype High Resolution Drift Tube Ion Mobility-Mass Spectrometer
journal, February 2014

Ionization and transmission efficiency in an electrospray ionization—mass spectrometry interface
journal, September 2007

Characterization of an Improved Electrodynamic Ion Funnel Interface for Electrospray Ionization Mass Spectrometry
journal, August 1999

An Ion Funnel Interface for Improved Ion Focusing and Sensitivity Using Electrospray Ionization Mass Spectrometry
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Ultrasensitive Proteomics Using High-Efficiency On-Line Micro-SPE-NanoLC-NanoESI MS and MS/MS
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