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Items: 50

1.

Fundamental Studies of New Ionization Technologies and Insights from IMS-MS.

Trimpin S, Inutan ED, Karki S, Elia EA, Zhang WJ, Weidner SM, Marshall DD, Hoang K, Lee C, Davis ETJ, Smith V, Meher AK, Cornejo MA, Auner GW, McEwen CN.

J Am Soc Mass Spectrom. 2019 Jun;30(6):1133-1147. doi: 10.1007/s13361-019-02194-7. Epub 2019 May 6.

PMID:
31062287
2.

Development of a robotics platform for automated multi-ionization mass spectrometry.

Karki S, Meher AK, Inutan ED, Pophristic M, Marshall DD, Rackers K, Trimpin S, McEwen CN.

Rapid Commun Mass Spectrom. 2019 Apr 4. doi: 10.1002/rcm.8449. [Epub ahead of print]

PMID:
30950108
3.

Vacuum Matrix-Assisted Ionization Source Offering Simplicity, Sensitivity, and Exceptional Robustness in Mass Spectrometry.

Trimpin S, Pophristic M, Adeniji-Adele A, Tomsho JW, McEwen CN.

Anal Chem. 2018 Oct 2;90(19):11188-11192. doi: 10.1021/acs.analchem.8b03378. Epub 2018 Sep 11.

PMID:
30130391
4.

Unprecedented Ionization Processes in Mass Spectrometry Provide Missing Link between ESI and MALDI.

Trimpin S, Lee C, Weidner SM, El-Baba TJ, Lutomski CA, Inutan ED, Foley CD, Ni CK, McEwen CN.

Chemphyschem. 2018 Mar 5;19(5):581-589. doi: 10.1002/cphc.201701246. Epub 2018 Feb 28.

PMID:
29205749
5.

Spontaneous Charge Separation and Sublimation Processes are Ubiquitous in Nature and in Ionization Processes in Mass Spectrometry.

Trimpin S, Lu IC, Rauschenbach S, Hoang K, Wang B, Chubatyi ND, Zhang WJ, Inutan ED, Pophristic M, Sidorenko A, McEwen CN.

J Am Soc Mass Spectrom. 2018 Feb;29(2):304-315. doi: 10.1007/s13361-017-1788-7. Epub 2017 Oct 27.

PMID:
29080207
6.

An LC/MS Method Providing Improved Sensitivity: Electrospray Ionization Inlet.

Fenner MA, Chakrabarty S, Wang B, Pagnotti VS, Hoang K, Trimpin S, McEwen CN.

Anal Chem. 2017 May 2;89(9):4798-4802. doi: 10.1021/acs.analchem.6b05172. Epub 2017 Apr 21.

PMID:
28387502
7.

Simplifying the ion source for mass spectrometry.

Lu IC, Pophristic M, Inutan ED, McKay RG, McEwen CN, Trimpin S.

Rapid Commun Mass Spectrom. 2016 Dec 15;30(23):2568-2572. doi: 10.1002/rcm.7718. No abstract available.

PMID:
27520740
8.

High Sensitivity Analysis of Nanoliter Volumes of Volatile and Nonvolatile Compounds using Matrix Assisted Ionization (MAI) Mass Spectrometry.

Hoang K, Pophristic M, Horan AJ, Johnston MV, McEwen CN.

J Am Soc Mass Spectrom. 2016 Oct;27(10):1590-6. doi: 10.1007/s13361-016-1433-x. Epub 2016 Jun 27.

PMID:
27349254
9.

Improving the Sensitivity of Matrix-Assisted Ionization (MAI) Mass Spectrometry Using Ammonium Salts.

Chubatyi ND, McEwen CN.

J Am Soc Mass Spectrom. 2015 Oct;26(10):1649-56. doi: 10.1007/s13361-015-1205-z. Epub 2015 Jun 30.

PMID:
26122522
10.

Gas-phase ions produced by freezing water or methanol for analysis using mass spectrometry.

Pagnotti VS, Chakrabarty S, Wang B, Trimpin S, McEwen CN.

Anal Chem. 2014 Aug 5;86(15):7343-50. doi: 10.1021/ac500132j. Epub 2014 Jul 11.

PMID:
25014489
11.

Chemical and biological detection.

McEwen CN, Ligler FS, Swager TM.

Chem Soc Rev. 2013 Nov 21;42(22):8581-3. doi: 10.1039/c3cs90078a. No abstract available.

PMID:
24100615
12.

A new matrix assisted ionization method for the analysis of volatile and nonvolatile compounds by atmospheric probe mass spectrometry.

Chakrabarty S, Pagnotti VS, Inutan ED, Trimpin S, McEwen CN.

J Am Soc Mass Spectrom. 2013 Jul;24(7):1102-7. doi: 10.1007/s13361-013-0634-9. Epub 2013 May 10.

PMID:
23661423
13.

Carbonation and other super saturated gases as solution modifiers for improved sensitivity in solvent assisted ionization inlet (SAII) and ESI.

Pagnotti VS, Chakrabarty S, McEwen CN.

J Am Soc Mass Spectrom. 2013 Feb;24(2):186-92. doi: 10.1007/s13361-012-0535-3. Epub 2013 Jan 8.

PMID:
23296909
14.

More inclusive or selective ionization for mass spectrometry using obstructive sonic spray ionization and voltage polarity switching.

Chubatyi ND, Wang T, McEwen CN.

Rapid Commun Mass Spectrom. 2012 Dec 15;26(23):2763-9. doi: 10.1002/rcm.6402.

PMID:
23124667
15.

A mechanism for ionization of nonvolatile compounds in mass spectrometry: considerations from MALDI and inlet ionization.

Trimpin S, Wang B, Inutan ED, Li J, Lietz CB, Harron A, Pagnotti VS, Sardelis D, McEwen CN.

J Am Soc Mass Spectrom. 2012 Oct;23(10):1644-60. Epub 2012 Jul 12.

PMID:
22791582
16.

Increasing the sensitivity of liquid introduction mass spectrometry by combining electrospray ionization and solvent assisted inlet ionization.

Pagnotti VS, Chakrabarty S, Harron AF, McEwen CN.

Anal Chem. 2012 Aug 7;84(15):6828-32. doi: 10.1021/ac3014115. Epub 2012 Jul 16.

PMID:
22742705
17.

High sensitivity steroid analysis using liquid chromatography/solvent-assisted inlet ionization mass spectrometry.

Chubatyi ND, Pagnotti VS, Bentzley CM, McEwen CN.

Rapid Commun Mass Spectrom. 2012 Apr 30;26(8):887-92. doi: 10.1002/rcm.6179.

PMID:
22396024
18.

Rapid screening of chemical warfare nerve agent metabolites in urine by atmospheric solids analysis probe-mass spectroscopy (ASAP-MS).

Zydel F, Smith JR, Pagnotti VS, Lawrence RJ, McEwen CN, Capacio BR.

Drug Test Anal. 2012 Mar-Apr;4(3-4):308-11. doi: 10.1002/dta.1331. Epub 2012 Mar 1.

PMID:
22383148
19.

The Asilomar conference on fundamentals of atmospheric pressure ionization techniques, October 8-12, 2010.

Cole RB, McEwen CN.

J Am Soc Mass Spectrom. 2011 Dec;22(12):2282-6. doi: 10.1007/s13361-011-0257-y. No abstract available.

PMID:
22048903
20.

Inlet ionization: a new highly sensitive approach for liquid chromatography/mass spectrometry of small and large molecules.

Pagnotti VS, Inutan ED, Marshall DD, McEwen CN, Trimpin S.

Anal Chem. 2011 Oct 15;83(20):7591-4. doi: 10.1021/ac201982r. Epub 2011 Sep 20.

PMID:
21899326
21.

Solvent assisted inlet ionization: an ultrasensitive new liquid introduction ionization method for mass spectrometry.

Pagnotti VS, Chubatyi ND, McEwen CN.

Anal Chem. 2011 Jun 1;83(11):3981-5. doi: 10.1021/ac200556z. Epub 2011 May 9.

PMID:
21528896
22.

High-throughput analysis of peptides and proteins by laserspray ionization mass spectrometry.

Richards AL, Marshall DD, Inutan ED, McEwen CN, Trimpin S.

Rapid Commun Mass Spectrom. 2011 Jan 15;25(1):247-50. doi: 10.1002/rcm.4841. No abstract available.

PMID:
21157869
23.

New paradigm in ionization: multiply charged ion formation from a solid matrix without a laser or voltage.

McEwen CN, Pagnotti VS, Inutan ED, Trimpin S.

Anal Chem. 2010 Nov 15;82(22):9164-8. doi: 10.1021/ac102339y. Epub 2010 Oct 25.

PMID:
20973512
24.

Laserspray ionization, a new method for protein analysis directly from tissue at atmospheric pressure with ultrahigh mass resolution and electron transfer dissociation.

Inutan ED, Richards AL, Wager-Miller J, Mackie K, McEwen CN, Trimpin S.

Mol Cell Proteomics. 2011 Feb;10(2):M110.000760. doi: 10.1074/mcp.M110.000760. Epub 2010 Sep 20.

25.

Laserspray ionization using an atmospheric solids analysis probe for sample introduction.

Zydel F, Trimpin S, McEwen CN.

J Am Soc Mass Spectrom. 2010 Nov;21(11):1889-92. doi: 10.1016/j.jasms.2010.07.005. Epub 2010 Jul 22.

26.

Laserspray ionization on a commercial atmospheric pressure-MALDI mass spectrometer ion source: selecting singly or multiply charged ions.

McEwen CN, Larsen BS, Trimpin S.

Anal Chem. 2010 Jun 15;82(12):4998-5001. doi: 10.1021/ac1006624.

PMID:
20469839
27.

Laserspray ionization, a new atmospheric pressure MALDI method for producing highly charged gas-phase ions of peptides and proteins directly from solid solutions.

Trimpin S, Inutan ED, Herath TN, McEwen CN.

Mol Cell Proteomics. 2010 Feb;9(2):362-7. doi: 10.1074/mcp.M900527-MCP200. Epub 2009 Nov 13.

28.

Matrix-assisted laser desorption/ionization mass spectrometry method for selectively producing either singly or multiply charged molecular ions.

Trimpin S, Inutan ED, Herath TN, McEwen CN.

Anal Chem. 2010 Jan 1;82(1):11-5. doi: 10.1021/ac902066s.

PMID:
19904915
29.

Rapid methods of polymer and polymer additives identification: multi-sample solvent-free MALDI, pyrolysis at atmospheric pressure, and atmospheric solids analysis probe mass spectrometry.

Trimpin S, Wijerathne K, McEwen CN.

Anal Chim Acta. 2009 Nov 3;654(1):20-5. doi: 10.1016/j.aca.2009.06.050. Epub 2009 Jun 25.

PMID:
19850163
30.

Combination atmospheric pressure solids analysis probe and desorption electrospray ionization mass spectrometry ion source.

Lloyd JA, Harron AF, McEwen CN.

Anal Chem. 2009 Nov 1;81(21):9158-62. doi: 10.1021/ac901324j.

PMID:
19807111
31.

A stable enol in small ring systems: clear differentiation between penta- and tri-valency of phosphorus atoms.

Ionkin AS, Marshall WJ, Fish BM, Schiffhauer MF, McEwen CN.

Chem Commun (Camb). 2008 Nov 14;(42):5432-4. doi: 10.1039/b809877h. Epub 2008 Sep 22.

PMID:
18985234
32.

Charge-remote fragmentation of lithiated fatty acids on a TOF-TOF instrument using matrix-ionization.

Trimpin S, Clemmer DE, McEwen CN.

J Am Soc Mass Spectrom. 2007 Nov;18(11):1967-72. Epub 2007 Aug 24.

34.

Multisample preparation methods for the solvent-free MALDI-MS analysis of synthetic polymers.

Trimpin S, McEwen CN.

J Am Soc Mass Spectrom. 2007 Mar;18(3):377-81. Epub 2006 Nov 20.

35.

Mass spectrometry of synthetic polymers.

Peacock PM, McEwen CN.

Anal Chem. 2006 Jun 15;78(12):3957-64. No abstract available.

PMID:
16771534
36.
37.

A combination atmospheric pressure LC/MS:GC/MS ion source: advantages of dual AP-LC/MS:GC/MS instrumentation.

McEwen CN, McKay RG.

J Am Soc Mass Spectrom. 2005 Nov;16(11):1730-8. Epub 2005 Sep 26.

38.

Fluorescence-based peptide labeling and fractionation strategies for analysis of cysteine-containing peptides.

Clements A, Johnston MV, Larsen BS, McEwen CN.

Anal Chem. 2005 Jul 15;77(14):4495-502.

PMID:
16013865
39.

Mass spectrometry of synthetic polymers.

Peacock PM, McEwen CN.

Anal Chem. 2004 Jun 15;76(12):3417-27. No abstract available.

PMID:
15193117
40.

Carrier ampholyte-free solution isoelectric focusing as a prefractionation method for the proteomic analysis of complex protein mixtures.

Shang TQ, Ginter JM, Johnston MV, Larsen BS, McEwen CN.

Electrophoresis. 2003 Jul;24(14):2359-68.

PMID:
12874871
41.

Mass spectrometry of chemical polymers.

McEwen CN, Peacock PM.

Anal Chem. 2002 Jun 15;74(12):2743-8. Review. No abstract available.

PMID:
12090661
42.

New polyazaporphine chemistry for the origin of life.

Neumer JF, Gordon MD, McEwen CN, Peacock PM, Hill SA, McKay RG, Lazar J, Valentine JR, Van Lenten FJ, Foris A.

Orig Life Evol Biosph. 1998 Feb;28(1):27-45.

PMID:
11536854
43.

The limitations of MALDI-TOF mass spectrometry in the analysis of wide polydisperse polymers

Michelle Byrd HC, McEwen CN.

Anal Chem. 2000 Oct 1;72(19):4568-76.

PMID:
11028612
44.

Sample preparation for high throughput accurate mass analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry.

Lake DA, Johnson MV, McEwen CN, Larsen BS.

Rapid Commun Mass Spectrom. 2000;14(11):1008-13.

PMID:
10844739
46.

Fundamentals of the application of matrix-assisted laser desorption-ionization mass spectrometry to low mass poly(methylmethacrylate) polymers.

Larsen BS, Simonsick WJ, McEwen CN.

J Am Soc Mass Spectrom. 1996 Mar;7(3):287-92. doi: 10.1016/1044-0305(95)00706-7.

PMID:
24203300
47.

The fundamentals of applying electrospray ionization mass spectrometry to low mass poly(methyl methacrylate) polymers.

McEwen CN, Simonsick WJ, Larsen BS, Ute K, Hatada K.

J Am Soc Mass Spectrom. 1995 Oct;6(10):906-11. doi: 10.1016/1044-0305(95)00476-T.

PMID:
24214034
48.

Production of perfluoroalkylated nanospheres from buckminsterfullerene.

Fagan PJ, Krusic PJ, McEwen CN, Lazar J, Parkert DH, Herron N, Wasserman E.

Science. 1993 Oct 15;262(5132):404-7.

PMID:
17789947
49.

An electrospray ion source for magnetic sector mass spectrometers.

Larsen BS, McEwen CN.

J Am Soc Mass Spectrom. 1991 May;2(3):205-11. doi: 10.1016/1044-0305(91)80045-9.

PMID:
24242274
50.

Negative gold ion gun for liquid secondary ion mass spectrometry.

McEwen CN, Hass JR.

Anal Chem. 1985 Apr;57(4):890-2. No abstract available.

PMID:
3993956

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