Results 251 to 260 of about 10,542,246 (288)
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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 +6 more
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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 +6 more
openaire +2 more sources
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 +2 more
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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 +2 more
openaire +2 more sources
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 +2 more
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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 +2 more
openaire +3 more sources
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 +6 more
openaire +5 more sources
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 +6 more
openaire +5 more sources
Journal of Agricultural and Food Chemistry, 2012
Honeys have a range of physicochemical and organoleptic properties, depending on the nectar source. Selected Ion Flow Tube-Mass Spectrometry (SIFT-MS) is an emerging technology that quantifies volatile organic compounds (VOCs) to low concentrations (usually parts-per-trillion (ppt) levels) and is here applied to monitor the aromas in the headspace of ...
Vaughan, Langford +4 more
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Honeys have a range of physicochemical and organoleptic properties, depending on the nectar source. Selected Ion Flow Tube-Mass Spectrometry (SIFT-MS) is an emerging technology that quantifies volatile organic compounds (VOCs) to low concentrations (usually parts-per-trillion (ppt) levels) and is here applied to monitor the aromas in the headspace of ...
Vaughan, Langford +4 more
openaire +2 more sources
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 +6 more
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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 +6 more
openaire +3 more sources
Improving VOC Quantitation Methodology Using Selected Ion Flow Tube Mass Spectrometry
ACS ES&T AirJaisree Iyer +2 more
exaly +2 more sources
Selected ion flow tube mass spectrometry (SIFT‐MS) for on‐line trace gas analysis
Mass Spectrometry Reviews, 2004AbstractSelected 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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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 +2 more
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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 +2 more
openaire +3 more sources
On‐line analysis of diesel engine exhaust gases by selected ion flow tube mass spectrometry
Rapid Communications in Mass Spectrometry, 2004Abstract Selected ion flow tube mass spectrometry (SIFT‐MS) has been used to analyse on‐line and in real time the exhaust gas emissions from a Caterpillar 3304 diesel engine under different conditions of load (idle and 50% of rated load) and speed (910, 1500 and 2200 rpm) using three types of fuel: an ultra‐low ...
David, Smith +4 more
openaire +2 more sources