Results 211 to 220 of about 50,630 (254)

Selected Ion Flow Tube (SIFT) Applications in Mass Spectrometry

2017
The first version of this article published in 1999 in Encyclopedia\nof Spectroscopy and Spectrometry, under the title “SIFT\napplications in mass spectrometry”, focused on the selected\nion flow tube, SIFT, technique that was primarily developed\nand used for the study of the kinetics of ion-molecule reactions\nat thermal energies.
Španěl, P. (Patrik), Smith, D.
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Evaluation of the performance of field olfactometers by selected ion flow tube mass spectrometry

Biosystems Engineering, 2015
Odour quantification is generally performed by olfactometry, a technique which determines to what extent an odorous air sample should be diluted with odour-free air to be just distinguishable from odour-free air. In this study, the performance of two field olfactometers (Nasal Ranger and Scentroid 110c) was evaluated with respect to their ability to ...
Christophe Walgraeve, Katrijn Van Huffel, Joren Bruneel, Herman Van Langenhove   +3 more
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Real‐time measurement of peroxyacetyl nitrate using selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2010
Abstract The on‐line detection of gaseous peroxyacetyl nitrate (PAN) using selected ion flow tube mass spectrometry (SIFT‐MS) has been investigated using a synthetic sample of PAN in air at a humidity of ∼30%. Using the H 3 O + reagent
Donald R, Hastie, John, Gray, Vaughan S, Langford, Robert G A R, Maclagan, Daniel B, Milligan, Murray J, McEwan   +5 more
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Selected ion flow tube mass spectrometry (SIFT‐MS) for on‐line trace gas analysis

Mass Spectrometry Reviews, 2004
AbstractSelected ion flow tube mass spectrometry (SIFT‐MS) is a new analytical technique for the real‐time quantification of several trace gases simultaneously in air and breath. It relies on chemical ionization of the trace gas molecules in air/breath samples introduced into helium carrier gas using H3O+, NO+, and O precursor ions.
David, Smith, Patrik, Spanel
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Application of Selected-Ion Flow Tube Mass Spectrometry to the Real-Time Detection of Triacetone Triperoxide

Analytical Chemistry, 2005
A fast, efficient, real-time method for the quantitative analysis of the peroxide explosive, TATP, is described. The method utilizes rapid ion-molecule reactions of chemical reagent ions with the vapor above solid TATP. The reactions of three reagent ions (H3O+, O2+, NO+) were examined.
Paul F, Wilson, Barry J, Prince, Murray J, McEwan   +2 more
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Monitoring chloramines and bromamines in a humid environment using selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2010
Abstract The selectivity and sensitivity of selected ion flow tube mass spectrometry (SIFT‐MS) for individual breath analysis of haloamines has been improved by heating the flow tube in a commercial instrument to around 106°C. Data is presented showing the marked reduction in the number density of water clusters of product ions of ...
Hu, Wan-Ping, Langford, Vanghan S., McEwan, Murray J., Milligan, Daniel B., Storer, Malina K., Dummer, Jack, Epton, Michael J.   +6 more
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Understanding Gas Phase Ion Chemistry Is the Key to Reliable Selected Ion Flow Tube-Mass Spectrometry Analyses

Analytical Chemistry, 2020
Ion-molecule reactions (IMR) are at the very core of trace gas analyses in modern chemical ionization (CI) mass spectrometer instruments, which are increasingly being used in diverse areas of research and industry. The focus of this Perspective is on the ion chemistry that underpins gas-phase analytical CI methods.
David Smith, Murray J. McEwan, Patrik Španěl   +2 more
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Real‐time differentiation of ethylbenzene and the xylenes using selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2019
Rationale Monitoring of isomeric analytes using mass spectrometry usually requires a time‐consuming chromatographic separation of the analytes before analysis. Selected ion flow tube mass spectrometry (SIFT‐MS) can provide rapid direct analysis of ethylbenzene and xylene by utilizing the ...
Caleb Allpress, Deb Crittenden, Jing Ma, Murray McEwan, Sage Robinson, Paul Wilson, Melvin Wu   +6 more
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Selected ion flow tube mass spectrometry for targeted analysis of volatile organic compounds in human breath

Nature Protocols, 2021
The analysis of volatile organic compounds (VOCs) within breath for noninvasive disease detection and monitoring is an emergent research field that has the potential to reshape current clinical practice. However, adoption of breath testing has been limited by a lack of standardization.
Ilaria Belluomo, Piers R. Boshier, Antonis Myridakis, Bhamini Vadhwana, Sheraz R. Markar, Patrik Spanel, George B. Hanna   +6 more
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Quantification of volatile compounds released by roasted coffee by selected ion flow tube mass spectrometry

Rapid Communications in Mass Spectrometry, 2018
Rationale The major objective of this exploratory study was to implement selected ion flow tube mass spectrometry, SIFT‐MS, as a method for the on‐line quantification of the volatile organic compounds, VOCs, in the headspace of the ground roasted coffee ...
Kseniya Dryahina, David Smith, Patrik Španěl   +2 more
openaire   +3 more sources