Nitrous oxide as reagent gas for positive ion chemical ionization mass spectrometry

Polley, Charles W.; Munson, Burnaby

doi:10.1021/ac00255a037

Cited by 22 publications

(7 citation statements)

References 28 publications

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“…Chemical ionization mass spectrometry (CIMS) often produces fragmentation that is diagnostic of the structural features of the sample substrate as well as ions that provide molecular weight information (1)(2)(3)(4). Much bf the research in CIMS has been toward the development of low-energy reagent ions which give very simple mass spectra (3)(4)(5)(6).…”

Section: Acknowledgmentmentioning

confidence: 99%

Methane high-pressure collisional activation mass spectrometry of aromatic hydrocarbons

Blom¹,

Munson²

1986

Anal. Chem.

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2001and only (M2 -H)+ and MzH+ appear in the mass spectrometer for both the Ni / 3 and laser ionization source even a t the lowest concentration levels studied. Below 150 "C the laser ionization signal becomes very weak due to lack of hot-band population. Although direct ionization of the neutral dimer is possible, at low concentration, formation of M+ followed by MH+ + M -MzH+ is believed to be the mechanism of dimer formation. ACKNOWLEDGMENTWe thank Michael Tierney for technical assistance given during the course of this work. Kambara, H.; KoJima, M.; Tomita, H.; Katoh, K.; Satoh, K. Dzidic, R. N.; Stillwell, M. G.; Hornlng, M. G.; Horning, E. C. Anal. Chem. 1974, 46, 706-710. 327-336. Griffin, 0. W.; RzMlc, I.; Carroll, D.; Stillwell, R. N.; Hornlng, E. C. Anal. Chem. 1973, 45, 1204-1209. Lubman, D. M.; Kronlw, M. N. Anal. Chem. 1982. 54, 1546-1551. Lubman, D. M.; Kronick, M. N. Anal. C h m . 1982, 54, 2289-2291. Lubman, D. M.; Kronick, M. N. Anal. Chem. 1982, 54, 660-665. Dietz, T. 0.; Duncan, M. A.; Liverman, M. 0.; Smaiby. R. E. Chem. Graduate Work in Chemistry, Unhrerslty of Waterloo, Waterloo, Ontario, Canada N2L 3G1. Lubman, D. M. Anal. Chem. 1984, 56, 1298. Tembreuii, R.; Sin, C. H.; Pang, H. M.; Lubman, D. M. Anal. Chem. Ellis, H. W.; Pai, R. Y.; Gatiand, I. R.; McDaniel, E. W.; Werniund, R.; Cohen. M. J. J. Chem. Phys. 1978, 64, 3935-3941. Lubman, D. M.; Naaman. R.; Zare. R. N. J. Chem. Phys. 1980, 72, 3035. Boesl, U.; Neusser. H.

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Section: Acknowledgmentmentioning

confidence: 99%

Methane high-pressure collisional activation mass spectrometry of aromatic hydrocarbons

Blom¹,

Munson²

1986

Anal. Chem.

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“…This report describes the use of nitric oxide (NO) as a selective reagent gas for charge exchange and charge attachment ionization under APCDI conditions. Nitric oxide is a well-characterized reagent gas that exhibits a variety of ionization mechanisms under classical chemical ionization (CI) conditions [2][3][4][5]. practice; however, it is not a common practice with APCDI.…”

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confidence: 99%

Nitric oxide-assisted atmospheric pressure corona discharge ionization for the analysis of automobile hydrocarbon emission species

Dearth

Komiski

1994

J. Am. Soc. Mass Spectrom.

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Nitric oxide reagent gas has been found to improve the sensitivity and robustness of the atmospheric pressure corona discharge ionization (APCDI) process. Sensitivity has been increased by a factor of 20-100, depending on the compound, over APCDI without nitric oxide. The robustness (defined as the sensitivity to matrix interferences) of APCDI in the presence of water has been improved by a factor of 3 over normal APCDI. These improvements are due in part to a modification of the commercial inlet system and ionization chamber that allows the chamber and sample gases to be heated to 100 and 350°C, respectively. Nitric oxide was chosen as the reagent gas because of the variety and selectivity of its interaction with hydrocarbons with differing functional groups. Product ions of nitric oxide ionization and their subsequent tandem mass spectra are presented and discussed for selected alkanes; alkenes, alkylbenzenes, alcohols; aldehydes, and an ether. A tandem mass spectrometry (unique parent ion-daughter ion transition) method was developed to quantify compounds of specific interest in vehicle emissions. The absolute sensitivity for these compounds, under ideal conditions, was determined and ranges from 0.006 ppb for xylene (most sensitive) to 80 ppb for C8 (or larger) normal alkanes. Routine sensitivity for real-world samples was in the single parts per billion range for aromatic and olefinic species. Potential applications include the real-time, on-line monitoring of selected hydrocarbons in automobile exhaust.

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“…The ASTDI mass spectra resembled those of NOCI and related techniques such as CH 3 NO 2 CI [20,25], N 2 O CI [26] and NO/H 2 CI [19], in which NO + is a major precursor ion. However, ASTDI mass spectra provided abundant molecular or quasimolecular ions, and detailed fragmentation from ion-molecule reactions with O 2…”

Section: Astdi Mass Spectramentioning

confidence: 73%

Atmospheric sampling Townsend discharge ionization mass spectrometry for analysis of gas-phase mixtures

Nøjgaard

Larsen

Wolkoff

2007

International Journal of Mass Spectrometry

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Nitrous oxide as reagent gas for positive ion chemical ionization mass spectrometry

Cited by 22 publications

References 28 publications

Methane high-pressure collisional activation mass spectrometry of aromatic hydrocarbons

Methane high-pressure collisional activation mass spectrometry of aromatic hydrocarbons

Nitric oxide-assisted atmospheric pressure corona discharge ionization for the analysis of automobile hydrocarbon emission species

Atmospheric sampling Townsend discharge ionization mass spectrometry for analysis of gas-phase mixtures

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