environmental applications of ion mobility mass...
TRANSCRIPT
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ASMS SHORT COURSE ON ION MOBILITY MASS SPECTROMETRY
(IMMS)Brian Clowers, John McLean and Erin Baker
5/14/16 1
Slide Set #1, 09:00am, Sunday, June 5, 2016
ASMS, San Antonio 2016
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GOALS OF THIS COURSE To gain an introductory understanding of the fundamentals of
ion mobility spectrometry and its analytical capabilities.
To describe the various types of IMMS instrument that are commercially available.
To appreciate the “Value Added” aspect of IMS when coupled to MS.
To provide the tools to evaluate different instruments and determine which will best suit your analytical needs.
To demonstrate the variety of applications of IMMS.
25/14/16 ASMS, San Antonio 2016
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Outline of CourseSunday
9:00 Introduction9:45 IMS Theory
10:15 Break10:45 Drift Tube IMS12:00 Lunch1:15 Traveling Wave IMS2:30 Break3:00 FAIMS3:45 Future Directions & Discussion4:30 Adjourn
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Morpho DetectionWilmington, MA
Explosives and Narcotics Detection
ITEMISERVaporTracer2
Smiths DetectionMississauga, Ont.
Canada
IONSCAN
SABRE 4000
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ChemPro-100 microDMx
Hand-Held Ion Mobility SpectrometersProducts in Development or Off-the-Shelf
Gated-Grid IMS
Smiths DetectionWatford, UK
Open-Loop IMS
Environics, OyMikkeli, Finland
Lightweight Chemical Detector
Gated-Grid IMS
G.A.S. Gesellschaft fur Analytische Sensorsysteme
Dortmund, Germany
µ-IMS
AC-DC IMS
Sionex Corp.Waltham, MA
55/14/16 ASMS, San Antonio 2016
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In-Service and Merging Military Detectors (approximate relative sizes)
RAID-1
RAID-M
M-90CAMM43-A1
ACADA MCAD
ChemPro
LCDJUNO
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Ion Mobility coupled with Mass Spectrometry
Traveling Wave IMS-TOF
Drift Tube IMS-TOF
Drift Tube IMS-Quad
DMS-MS
Synapt HDMS
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Overview
• IMS Concept & History
• Ion Mobility Spectrometers
• Ion Mobility-Mass Spectrometers
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p (Drift Gas)
Ffriction
IonFel
Ion Mobility Concept
velocity is constant
v = K EK = ion mobility
Drift Cell
E
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Ion Mobility Experiment
10
Electric Field (E)
Drift Gas
Ion source
Detector
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11
Electric Field (E)
Drift Gas
Ion source
Detector
Ion Mobility Experiment
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12
Electric Field (E)
Drift Gas
Ion source
Detector
Ion Mobility Experiment
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E
in out
Drift Time
Pulse of 2 ions with same m/z but different shape
Different conformers separate in time with peak heights representing the amount of each
velocity is constant
v = K EK = ion mobility
Drift Cell
Ion Mobility Concept
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Ion Mobility Concept
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Genesis of Ion Mobility
• Pioneers measuring electrical current– Faraday– Gauss
• Gas-Phase Kinetics– Diffusion– Ion Generation
Langevin, P., Ann. de Chim. Phys. 1903, 7, 19Langevin, P., Ann. de Chim. Phys. 1905, 5, 245
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Evolution of IMS and IMMS
J. C. May and J. A. McLean, Analytical Chemistry 87, 1422-1436 (2015). 165/14/16
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K. M. Hines, J. R. Enders, and J. A. McLean, Encyclopedia of Analytical Chemistry, R. Myers and D. C. Muddiman, Eds., John Wiley & Sons (2012).
The training ofnext generation scientists
Evolution of IMS with MS
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Ion Mobility Spectrometers
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Types of Ion Mobility Spectrometers
• Static Fields– Drift Tube IMS (DTIMS)– Differential Mobility Analyzer
(DMA)• Dynamic Fields
– Field Asymmetric IMS (FAIMS)– Trapped IMS (TIMS)– Traveling Wave IMS (TWIMS)
Biochimica et Biophysica Acta 1811 (2011) 935–945
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All the flavors of ion mobility spectrometry…
Name Type IonMigration
ElectricField Gas Flow MS
Analogue
Drift Tube (IMS)Plasma ChromatographyGas-Phase Electrophoresis
Tem
pora
l Disp
ersiv
e(t
ime-
of-fl
ight
)
→ → 0 Time-of-flight MS
Traveling Wave (T-Wave) → →→→ 0 Wave MS“Solitron”*
High-Field Asymmetric IMS (FAIMS)Differential Mobility Spectrometry (DMS)
RF Ion Mobility Spectrometry
Spat
ialD
isper
sive
(Filt
er)
→ ↑ → QuadrupoleMS
→ → ↑ Magnetic Sector MS
Differential Mobility Analyzer (DMA)Electrical Aerosol Analyzer (EAA)Gas-Phase Electrophoretic Molecular
Mobility Analyzer (GEMMA)
Counterflow Techniques(CMA)
Eith
er
→ → ← Ion Trap
Counterfield Techniques(Pulsed Reverse Field IMS)
→ ← → Ion Trap
*L.S. Tung, W.L. Barr, R.S. Lowder, R.F. Post “Mass, Charge, and Energy Separation by Selective Acceleration with a Traveling Potential Hill” J. Appl. Phys. 80(7) 199620
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All the flavors of ion mobility spectrometry…
Name Type IonMigration
ElectricField Gas Flow MS
Analogue
Drift Tube (IMS)Plasma ChromatographyGas-Phase Electrophoresis
Tem
pora
l Disp
ersiv
e(t
ime-
of-fl
ight
)
→ → 0 Time-of-flight MS
Traveling Wave (T-Wave) → →→→ 0 Wave MS“Solitron”*
High-Field Asymmetric IMS (FAIMS)Differential Mobility Spectrometry (DMS)
RF Ion Mobility Spectrometry
Spat
ialD
isper
sive
(Filt
er)
→ ↑ → QuadrupoleMS
→ → ↑ Magnetic Sector MS
Differential Mobility Analyzer (DMA)Electrical Aerosol Analyzer (EAA)Gas-Phase Electrophoretic Molecular
Mobility Analyzer (GEMMA)
Counterflow Techniques(CMA)
Eith
er
→ → ← Ion Trap
Counterfield Techniques(Pulsed Reverse Field IMS)
→ ← → Ion Trap
*L.S. Tung, W.L. Barr, R.S. Lowder, R.F. Post “Mass, Charge, and Energy Separation by Selective Acceleration with a Traveling Potential Hill” J. Appl. Phys. 80(7) 1996
Temporal dispersion
Spatial dispersion
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Drift Tube IMS
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Anatomy of Drift Cell
Reaction/DesolvationRegion
Drift RegionIon Gate
2nd Ion Gate*
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GE Ion TrackWilmington, MA
Explosives and Narcotics Detection
ITEMISERVaporTracer2
Smiths DetectionMississauga, Ont.
Canada
IONSCAN
SABRE 4000
245/14/16 ASMS, San Antonio 2016
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Recent Drift Tube Instrument
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P+P2+
P3+P4+
L+L+
L2+
P+
P2+
P3+P4+
L2+
L+
Peptide : red Lipid : blue
Distinguish isomers & different classes of ions
Peptides and lipids are easily distinguished
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Dynamic Field IMS
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Traveling Wave IMS For IMS Analysis NitrogenIs Admitted Into The Ion Mobility Separator (~0.5 mbar)
Fragmentation (CID) can be induced in both the TRAP & TRANSFER Regions (~10-3
mbar)
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Traveling Wave IMS
John Shockcor, Waters 295/14/16 ASMS, San Antonio 2016
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Charge Separation of a Protein Digest
A 2D plot of ion arrival time vs. m/z for a protein digest mixture obtained using TWIMS. Reprinted from International Journal of Mass Spectrometry vol. 261, S. D. Pringle, K. Giles, J. L. Wildgoose, J. P. Williams, S. E. Slade, K. Thalassinos, R. H. Bateman, M. T. Bowers, and J. H. Scrivens, “An investigation of the mobility separation of some peptide and protein ions using a new hybrid quadrupole/traveling wave IMS/TOF instrument”, 1-12. Copyright (2007) with permission from Elsevier.
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31
TRAPPED ION MOBILITY SPECTROMETRY
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Orthogonal Field IMS
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Differential Mobility Analyzer
Inlet slit of charged particles of several mobilities
Uniform flow at velocity U
Δ
Exit hole of particles at mobility Z = UΔ2/ LVDMA
Electric Field E = VDMA / Δ
L
33
1000 50000
2
4
6
8
10
Sign
al (V
)
DMA Voltage (V)
THA+ peak at different seath air speeds
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FIELD ASYMMETRIC WAVEFORM ION MOBILITY SPECTROMETRY (FAIMS)
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AIR/SAMPLEFLOW
IONSOURCE
IONCOLLECTORS
PARALLEL PLATES ORCONCENTRIC CYLINDERS
DISPERSIONVOLTAGE
(Asymmetric AC)
RF-DC Ion Mobility Spectrometry“Field Ion Spectrometry” “Differential Mobility Spectrometry”
“Field Asymmetric Ion Mobility Spectrometry”
COMPENSATIONVOLTAGE
(DC)
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365/14/16 ASMS, San Antonio 2016
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D. Barnett, B. Ells, R. Guevremont, and R. W. Purves “Separation of Leucine and Isoleucine by Electrospray Ionization – High Field Asymmetric Waveform Ion Mobility Spectrometry –Mass Spectrometry”, 21st Capillary Chromatography and Electrophoresis Conference, Park City, Utah, July 1999.
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ION MOBILITY MASS SPECTROMETERS
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Value Added Information to Mass and Mass Fragmentation• Pre-separation step prior to mass spectrometry• Increase in peak capacity • Separation of isomers and isobars• Separation of conformers• Chiral Separations• Reduction of chemical and random noise• Charge state separation• Identification of charge location• Measurement of ion size• Class identification by mobility-mass correlation lines • Isotope measurements in complex mixtures
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TYPES OF IMMS INSTRUMENTS
Ion Mobility Spectrometers Mass Spectrometers
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Types of IMMS InstrumentsIon Mobility Spectrometers
• Drift Time IMS– Low Pressure– Atmospheric Pressure– High Pressure
• Orthogonal Field IMS– FAIMS– DMS– DMA
• Dynamic Field IMS– Traveling Wave– Trapped Ion
Mass Spectrometers
• Quadrupole
• Time-of-flight
• Ion trap
• Fourier Transform Ion Cyclotron
• Magnetic Sector
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Multidimensional AnalysesLC (minutes) IMS (~60 ms) MS (~100 µs)
IMS
MS
Elution Time Drift Time m/z
0 10 20 30 40 50 60
Elution Time (minutes)
Inte
nsity
20 30 40 50 60Drift Time (ms)
20 30 40 50 60Drift Time (ms)
20 30 40 50 60Drift Time (ms)
1100
100
m/z
1100
100
m/z
1100
100
m/z
425/14/16
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Multidimensional analyses & timescale
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High dimensional molecular characterization
445/14/16
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45
http://www.springer.com/chemistry/analytical+chemistry/journal/12127
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ISIMS Conference 2015 Boston, MA
July 24 – July 28, 2016
46
IMSShort Course
July 23-24, 2016
5/14/16 ASMS, San Antonio 2016
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QUESTIONS?
475/14/16 ASMS, San Antonio 2016
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COFFEE BREAK
485/14/16 ASMS, San Antonio 2016
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Drift Tube Ion MobilityMass Spectrometry
(DTIMMS)
ASMS 2016
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Types of IMMS Instruments
Ion Mobility Spectrometers• Drift Tube IMS
– Pressure > 760 Torr– Pressure = 760 Torr– Pressure < 760 Torr
• Orthogonal Field IMS– FAIMS– DMS– DMA
• Traveling Wave IMS
Mass Spectrometers• Quadrupole• Time-of-flight• Ion trap• Fourier Transform Ion
Cyclotron Resonance• Orbitrap
Commercially availableResearch
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DTIMS-MS• Commercially Available Instruments
– IMS(atm)-Q MS– IMS(atm, 2-4 torr)-TOF
• Research Instruments– IMS(atm, ~10 torr)-IT– IMS(atm)-FTICR– IMS(atm)-QqQ MS
Biochimica et Biophysica Acta 1811 (2011) 935–945
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Typical AP Ion Mobility Technology• Stacked-ring drift tube, external
resistor series voltage divider, Bradbury-Nielsen or Tyndall gate.
• AP, especially with ESI sources, requires higher temperatures (100-250 0C) for declustering.
• “Reaction region” drift zone for ion desolvation prior to gating, especially with ESI.
• Temperature is a significant parameter and control issue
•L 10-30 cm•T 100-250 0C•P ambient•E/N 1-10 Td
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IMS-QUAD
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IMS-QUAD
ESI – IMS (RP ~ 60-80)
Differentially Pumped Interface
www.excellims.com
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IMS – TRIPLE QUAD
dx.doi.org/10.1021/ac201999a |Anal. Chem. 2011, 83, 8596–8603
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IMS-QQQ
• Peak Broadening– No axial field
in multipoles
dx.doi.org/10.1021/ac201999a |Anal. Chem. 2011, 83, 8596–8603
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IMS-QQQ
dx.doi.org/10.1021/ac201999a |Anal. Chem. 2011, 83, 8596–8603
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IMS - IT
Mass Analysis of Mobility-Selected Ion Populations Using Dual Gate Ion Mobility Quadrupole Ion Trap Mass Spectrometry, B. H. Clowers, H. H. Hill, Jr., Anal. Chem. 2005, 77, 5877-5885
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IMS-QExactive (Orbitrap)Higher Pressure (9 torr) Ion Funnel
1 mm i.d. Analyte Inlet
0.5 mm i.d. Calibrant Inlet
Ion Funnel Trap (4 torr)
Rear Ion Funnel (4 torr)Segmented quadrupole (80 mtorr)
Quadrupole (300 mtorr)
Belov, ASMS 2011, IMS-Orbitrap Multiplexing
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IMS - FTICR
Nano-ESI Ion mobility spectrometer Ion transfer optics and Q-interface ICR cell
Focus screen inlet
Ion Gate 1
Flared inlet capillary
Skimmer 1&2
Hexapole 1
Quadrupole
Transfer optics7T magnet
Drift gas inlet
Ion Gate 2Hexapole 2
Nano-ESI Ion mobility spectrometer Ion transfer optics and Q-interface ICR cell
Focus screen inlet
Ion Gate 1
Flared inlet capillary
Skimmer 1&2
Hexapole 1
Quadrupole
Transfer optics7T magnet
Drift gas inlet
Ion Gate 2Hexapole 2
Design and performance of an atmospheric pressure ion mobility Fourier transform ion cyclotron resonance mass spectrometer, X. Tang, J. E. Bruce, H. H. Hill Jr., Rapid Communications Mass Spectrom. 21 (2007) 1115-1122.
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IMS - TOF
L.G. McKnight, K.B. McAfee and D.P. Sipler Phys. Rev. 1967, 164(1), 62
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•L 30-200 cm•T ambient•P 1-10 torr•E/N 4-40 Td
• Stacked-ring drift tube with external voltage divider, single-mesh or gridless gating by voltage pulse
• Low pressure tubes usually operate at ambient or sub-ambient temperature
• No reaction region in drift tube, but often uses apertures and/or He buffer regions to define pressure zones
• Pressure is main measurement and control issue
Low Pressure Ion Mobility Systems
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Low Pressure Ion Funnel Interface
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Ion Funnel Trap
• Larger trapping volume
• Ejection is mobility dependent– Trapped Ion Mobility
Spectrometry (TIMS)
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L 88 cmR ~50T ambientP 4 torr N2E/N 12 Td
J Am Soc Mass Spectrom 2007, 18, 1176–1187
IMS-TOF Systems
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IMS-TOF Systems (2012)
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Traditional Pulsing Scheme
Baker et. al, ASMS 2011, High-Throughput Proteomics Platform Demonstrated for Liver Disease Progression Biomarker Verification
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Hadamard Pulsing Scheme
Baker et. al, ASMS 2011, High-Throughput Proteomics Platform Demonstrated for Liver Disease Progression Biomarker Verification
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IMS-IMS-TOF
An IMS-IMS Analogue of MS-MS, S. L. Koeniger, S. I. Merenbloom, S. J. Valentine, M. F. Jarrold, H. R. Udseth, R. D. Smith, and D. E. Clemmer, Anal. Chem. 78 (2006) 4161-4174
L 87.1+94.9 = 182 cmR D1+D2 80-120, D2 40-70T ambientP 2.5 – 3.5 torr HeE/N 10 – 15 Td
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IMS-IMS-TOF
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IMS-IMS-TOF
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IMS-IMS-TOF
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Two Meter IMS
A new, higher resolution, ion mobility spectrometer, P. R. Kemper, N. F. Dupuis, M. T. Bowers, Int. J. Mass Spectrom. 287 (2009) 46-57.
L 2 meterR ~ 110 in HeT ambient P 12-15 torr HeE/N 4-7 Td
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ALTERNATIVE AND HYBRIDINSTRUMENTATION
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• Fundamental Ion Studies– Kinetics– Clustering Equilibria
Variable Temperature System
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Cyclotron IMS-MS
High-Resolution Ion Cyclotron Mobility Spectrometry, S. I. Merenbloom, R. S. Glaskin, Z. B. Henson, and D. E. Clemmer, Anal. Chem. 81 (2009) 1482-1487.
• Mobility filtering device• Filtering resolving power of ~300
Cyclotrons
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Experimental Evaluation and Optimization of Structures for Lossless Ion Manipulations for Ion Mobility Spectrometry with Time-of-Flight Mass Spectrometry, I. K. Webb , S. V. B. Garimella, A. V. Tolmachev , T-C. Chen , X. Zhang, R. V. Norheim, S. A. Prost , B. LaMarche, G. A. Anderson, Y. M. Ibrahim, and R. D. Smith, Anal. Chem. 86 (2014) 9169-9176.
Printed Circuit Boards
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• Currently under development -- Bruker
Trapped Ion Mobility Spectrometry
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Trapped Ion Mobility Spectrometry
Int. J. Ion Mobil. Spec. (2011) 14:93-98
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Photofragmentation
Zucker, S. M.; Lee, S.; Webber, N.; Valentine, S. J.; Reilly, J. P. and Clemmer, D. E. An Ion Mobility/Ion Trap/Photodissociation Instrument for Characterization of Ion Structure. J. Am. Soc. Mass Spectrom., 2011, 22, 1477–1485.
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BENEFITS OF IMS DRIFT TIME SEPARATION
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BSA tryptic digest (25 µg/mL) (5 sec acquisition)
P+
P2+
P3+P4+
Human Plasma tryptic digest (0.5 mg/mL) (summed LC run for 50 minutes)
10 20 30 40Drift Time (ms)
50 6020 25 30Drift Time (ms)
35
P2+
P3+P4+
Benefits of IMS drift time separation1. Separates different charge states, isomers and classes of compounds
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RPPGFSPFR+
GPFRPRFPS+
RRGPFPSPF+
NW Chem used to model 3-D conformations
Benefits of IMS drift time separation1. Separates different charge states, isomers and classes of compounds
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cis 9 cis 6
16:1
cis 9cis 6
cis 6
Benefits of IMS drift time separation1. Separates different charge states, isomers and classes of compounds
Fatty acid analysis with IMS
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16:1
cis 9
18:1
cis 6 cis 11cis 9 trans 9 or 11 22:1
22:0cis 1318:0
cis 11
cis 9
trans 11
trans 9
18:0
18:1
Lowest energy structures from AMBER molecular dynamics simulations
Benefits of IMS drift time separation1. Separates different charge states, isomers and classes of compounds
Fatty acid analysis with IMS
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P+P2+
P3+P4+
L+L+
L2+
P+
P2+
P3+P4+
L2+
L+
Peptide : red Lipid : blue
Benefits of IMS drift time separation
Peptides and lipids are easily distinguished
1. Separates different charge states, isomers and classes of compounds
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J Am Soc Mass Spectrom 2009, 20, 1775–1781
Benefits of IMS drift time separation1. Separates different charge states, isomers and classes of compounds
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Benefits of IMS drift time separation2. Improved Sensitivity & Increase Feature Detection & Confidence
IMS-QTOF MS of Bradykinin (100 pM)QTOF MS of Bradykinin (100 pM)
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Benefits of IMS drift time separation2. Improved Sensitivity & Increase Feature Detection & Confidence
Only 3 features discerned without drift time dimension (*)
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Spiking Level Non-Serum Peptide 60-min LC-
IMS-TOF MS60-min LC-TOF MS
100-min LC-Velos-Orbitrap
100 pg/mL Melittin ND ND ND
100 pg/mL Dynorphin A Porcine Fragment 1-13 ND ND
1 ng/mL Des Pro Ala Bradykinin ND ND
1 ng/mL Leucine Enkephalin ND ND
10 ng/mL 3X FLAG Peptide ND
10 ng/mL Substance P
100 ng/mL Methionine Enkephalin
100 ng/mL [Ala92]-Peptide 6
8 peptides spiked in human serumSample analyzed using Velos-Orbitrap, TOF MS and IMS-TOF MS instruments
Benefits of IMS drift time separation2. Improved Sensitivity & Increase Feature Detection & Confidence
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3. Utilizing IMS in databases reduces FDR due to extra dimension
Benefits of IMS drift time separation
Mass Error LC Error
Drift Time Error
Extra dimension adds confidence to LC-IMS-MS Features Matches to AMT Tag DB
60-min LC-IMS-MS40519 Features with FDR <5%If you only use LC and MS29007 Features with FDR <5%
Human Serum Peptide Analysis
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Parent Spectrum Fragmentation Spectrum
Fragments have the same drift time as precursors
Benefits of IMS drift time separation4. IMS-(CID)-MS Multiplexed Fragmentation
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Parent Spectrum (3 Peptides Observed in 1 sec LC acquisition)2 hemepeptides identified
Fragmentation Spectrum
Heme Containing Peptides
(Heme)+
Heme Containing Peptides
No Heme
Zoomed into 617 region
Find multiple hemepeptides simultaneously by looking for heme+ ion at 617
Benefits of IMS drift time separation4. IMS-(CID)-MS Multiplexed Fragmentation
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Parent Spectrum (11 Peptides Observed in 1 sec LC acquisition) Fragmentation Spectrum
Find multiple phosphopeptides by looking for PO3 or PO4 mass difference
Benefits of IMS drift time separation4. IMS-(CID)-MS Multiplexed Fragmentation
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Parent Spectrum (11 Peptides Observed in 1 sec LC acquisition)3 Phosphopeptides Identified
Fragmentation Spectrum
Find multiple phosphopeptides by looking for PO3 or PO4 mass difference
Phospho-peptides
Benefits of IMS drift time separation4. IMS-(CID)-MS Multiplexed Fragmentation
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The Complementary Unionof IMS and MS
• Reduces chemical and electronic noise, increasing the signal to noise ratio– Aids in deisotoping and charge state identification
• Separates based on CCS/charge ratio rather than mass/charge ratio, providing a second dimension of separation for a mass spectrometer
• Separate isomers and conformers
• Provides structural information when compared with molecular models
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The Complementary Unionof IMS and MS
• Rapid separations prior to MS (10s of ms)
• Higher resolving powers than approach or exceed those from gas or liquid chromatography – Increases peak capacity
• Separation selectivity can be adjusted by altering drift gas
• Rapid isomeric separations are possible when chiral modifiers are used as drift gases
• Compatible with all MS based ionization sources– ESI, SESI, MALDI, 63Ni, Corona, Photoionization, etc.
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The Complementary Unionof IMS and MS
• Produces mobility-mass correlation (ion-density) curves that can be used to identify classes of compounds
• At the IMS-MS interface, collision induced dissociation of the mobility separated ion can provide fragmentation pattern information
• Interfaces easily with both gas and liquid chromatography
– Additional dimension of separation (Peak Capacity)
• Facilitates the measurement of isomers
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QUESTIONS?