The air humidity effect on the detection of TNT, PETN and NG by the FAIMS technique

Pawłowski, W.; Zalewska, A.; Matyjasek, Łukasz; Karpińska, Monika

doi:10.1016/j.snb.2017.03.022

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…The samples tested to date only contained minimal amounts of water, whereas real breath is oversaturated with humidity. Although FAIMS analysis is possible even at extremely humid conditions, the presence of high–and potentially varying–amounts of humidity will have a major effect on the FAIMS signal intensity, since the FAIMS detection mechanism is based on ionized water clusters [57,58]. Therefore, chemometric data treatment in dependence of the present water level or experimentally filtering out the humidity by a condenser as proposed by Maiti et al [59], which is explicitly suitable for dehumidifying breath without significant VOC loss, could be possible strategies to address high humidity levels in breath.…”

Section: Resultsmentioning

confidence: 99%

Hybrid Analytical Platform Based on Field-Asymmetric Ion Mobility Spectrometry, Infrared Sensing, and Luminescence-Based Oxygen Sensing for Exhaled Breath Analysis

Hagemann

Repp

Mizaikoff

2019

Sensors

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The reliable online analysis of volatile compounds in exhaled breath remains a challenge, as a plethora of molecules occur in different concentration ranges (i.e., ppt to %) and need to be detected against an extremely complex background matrix. Although this complexity is commonly addressed by hyphenating a specific analytical technique with appropriate preconcentration and/or preseparation strategies prior to detection, we herein propose the combination of three different detector types based on truly orthogonal measurement principles as an alternative solution: Field-asymmetric ion mobility spectrometry (FAIMS), Fourier-transform infrared (FTIR) spectroscopy-based sensors utilizing substrate-integrated hollow waveguides (iHWG), and luminescence sensing (LS). By carefully aligning the experimental needs and measurement protocols of all three methods, they were successfully integrated into a single compact analytical platform suitable for online measurements. The analytical performance of this prototype system was tested via artificial breath samples containing nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and acetone as a model volatile organic compound (VOC) commonly present in breath. All three target analytes could be detected within their respectively breath-relevant concentration range, i.e., CO2 and O2 at 3-5 % and at ~19.6 %, respectively, while acetone could be detected with LOQs as low as 165-405 ppt. Orthogonality of the three methods operating in concert was clearly proven, which is essential to cover a possibly wide range of detectable analytes. Finally, the remaining challenges toward the implementation of the developed hybrid FAIMS-FTIR-LS system for exhaled breath analysis for metabolic studies in small animal intensive care units are discussed.

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Section: Resultsmentioning

confidence: 99%

Hybrid Analytical Platform Based on Field-Asymmetric Ion Mobility Spectrometry, Infrared Sensing, and Luminescence-Based Oxygen Sensing for Exhaled Breath Analysis

Hagemann

Repp

Mizaikoff

2019

Sensors

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“…Ion mobility spectrometry (IMS) is the most frequently used technique for detecting explosives. To detect TNT pairs, the MO-2M detector was used, which uses the method of non-linear dependence of ion mobility on the electric field strength (FAIMS) [ 33 , 34 , 35 , 36 ]. This method measures changes in the mobility of individual ions [ 37 ].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Soil Moisture on the Ability to Detect TNT Pairs from the Sand Layer in Order to Prevent Environmental Pollution and Groundwater

Pawłowski

Karpińska

2021

Molecules

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The aim of the study was to investigate the influence of sand bed moisture on TNT transport from under the sand layer. The MO-2M explosive vapor detector was used, the detection mechanism of which is based on the FAIMS method. In addition, it was determined after what time the detector alarm appears, signaling the presence of TNT vapors, and how it affects the thickness of the sand layer. The performed work allowed us to assess the suitability and possibly adapt the MO-2M detector to detect non-metal mines, which will help develop new application possibilities for this device. These tests can also be used to eliminate environmental contamination resulting from the deposition of explosives in the ground and the migration of harmful compounds to groundwater.

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“…[14][15][16] In recent years, FAIMS has been widely used owing to its high sensitivity and rapid detection. [17][18][19][20] Researchers achieved the separation and identication of isomers by adjusting the amplitude of the RF voltage and the carrier gas ow rate. However, this method requires a specic RF voltage interval for different analytes, as well as a high performance separation voltage source, and there is an upper limit to the improvement of the resolution.…”

Section: Introductionmentioning

confidence: 99%

High-field asymmetric waveform ion mobility spectrometry for xylene isomer separation assisted by helium-chemical modifiers

Wang

Zeng

et al. 2022

Anal. Methods

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The air humidity effect on the detection of TNT, PETN and NG by the FAIMS technique

Cited by 6 publications

References 25 publications

Hybrid Analytical Platform Based on Field-Asymmetric Ion Mobility Spectrometry, Infrared Sensing, and Luminescence-Based Oxygen Sensing for Exhaled Breath Analysis

Hybrid Analytical Platform Based on Field-Asymmetric Ion Mobility Spectrometry, Infrared Sensing, and Luminescence-Based Oxygen Sensing for Exhaled Breath Analysis

The Effect of Soil Moisture on the Ability to Detect TNT Pairs from the Sand Layer in Order to Prevent Environmental Pollution and Groundwater

High-field asymmetric waveform ion mobility spectrometry for xylene isomer separation assisted by helium-chemical modifiers

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