Results 201 to 210 of about 50,630 (254)

Analysis of ketones by selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2003
Abstract A selected ion flow tube mass spectrometry (SIFT‐MS) study of the reactions of H 3 O + , NO + and O 2 +
David, Smith, Tianshu, Wang, Patrik, Spanĕl   +2 more
openaire   +2 more sources

Selected ion flow tube mass spectrometry of urine headspace

Rapid Communications in Mass Spectrometry, 1999
We describe the use of our selected ion flow tube mass spectrometric technique (SIFT-MS) for the analysis of the headspace above urine. Ammonia, nitric oxide, acetone, ethanol and methanol are identified as the dominant species. As expected, the ammonia is increased in the headspace by making the urine alkaline and the nitric oxide is increased by ...
D, Smith, P, Spanĕl, T A, Holland, W, al Singari, J B, Elder   +4 more
openaire   +2 more sources

Reactions of Ions with Ionic Liquid Vapors by Selected-Ion Flow Tube Mass Spectrometry

The Journal of Physical Chemistry Letters, 2011
Room-temperature ionic liquids exert vanishingly small vapor pressures under ambient conditions. Under reduced pressure, certain ionic liquids have demonstrated volatility, and they are thought to vaporize as intact cation-anion ion pairs. However, ion pair vapors are difficult to detect because their concentration is extremely low under these ...
Steven D, Chambreau, Jerry A, Boatz, Ghanshyam L, Vaghjiani, Jeffrey F, Friedman, Nicole, Eyet, A A, Viggiano   +5 more
openaire   +2 more sources

Selected ion flow tube mass spectrometry of exhaled breath condensate headspace

Rapid Communications in Mass Spectrometry, 2008
Abstract Collection of exhaled breath condensate (EBC) is a relatively simple noninvasive method of breath analysis; however, no data have been reported that would relate concentration of volatile compounds in EBC to their gaseous concentrations in exhaled air.
Petr, Cáp, Kseniya, Dryahina, Frantisek, Pehal, Patrik, Spanel   +3 more
openaire   +2 more sources

Focusing on Volatile Organic Compounds of Natural Resins by Selected-Ion Flow Tube-Mass Spectrometry

Journal of the American Society for Mass Spectrometry, 2022
The analysis of archeological artifacts, due to the high value of antique objects, is preferably performed by nondestructive, noninvasive, and in situ techniques. At present, the most common in situ protocols used for the analysis of organic materials are spectroscopic approaches.
Camilla Guerrini, Federica Nardella, Annachiara Morganti, Jacopo La Nasa, Ilaria Degano, Erika Ribechini   +5 more
openaire   +2 more sources

Quantification of Methanol in the Presence of Ethanol by Selected Ion Flow Tube Mass Spectrometry

European Journal of Mass Spectrometry, 2016
The quantification of trace compounds in alcoholic beverages is a useful means to both investigate the chemical basis of beverage fLavor and to facilitate quality control during the production process. One compound of interest is methanol which, due to it being toxic, must not exceed regulatory limits.
Catherine, Chambers-Bédard, Brian M, Ross   +1 more
openaire   +2 more sources

Quantification of hydrogen sulphide in humid air by selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2000
We report the results of a study of the reactions of H(3)O(+), NO(+) and O(2)(+.) ions with H(2)S. This study was undertaken to provide a thorough understanding of the ion chemistry required for accurate quantification of H(2)S in humid air by selected ion flow tube mass spectrometry (SIFT-MS).
P, Spanel, D, Smith
openaire   +2 more sources

Quantification of hydrogen cyanide in humid air by selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2004
Abstract Following our recent observation that Pseudomonas bacteria in vitro emit hydrogen cyanide, we have found it necessary to investigate the ion chemistry of this compound and to extend the kinetics database for selected ion flow ...
Patrik, Spanĕl, Tianshu, Wang, David, Smith   +2 more
openaire   +2 more sources

Application of selected ion flow tube mass spectrometry to real‐time atmospheric monitoring

Rapid Communications in Mass Spectrometry, 2010
Abstract Data are presented for real‐time atmospheric monitoring of volatile organic chemicals (VOCs) in air using selected ion flow tube mass spectrometry (SIFT‐MS) technology. These measurements were made by one of the new generation of SIFT‐MS instruments.
Barry J, Prince, Daniel B, Milligan, Murray J, McEwan   +2 more
openaire   +2 more sources

Determination of Olive Oil Oxidative Status by Selected Ion Flow Tube Mass Spectrometry

Journal of Agricultural and Food Chemistry, 2007
The emergence of primary and secondary oxidation products in New Zealand extra virgin olive oil during accelerated thermal oxidation was measured and correlated with the concentrations of 13 headspace volatile compounds measured by selected ion flow tube mass spectrometry (SIFT-MS). SIFT-MS is a mass spectrometric technique that permits qualitative and
Brett M, Davis, Murray J, McEwan
openaire   +2 more sources