Ternary Gas Mixture Quantification Using Field Asymmetric Ion Mobility Spectrometry (FAIMS)

Yokoshiki, Yasufumi; Nakamoto, Takamichi

doi:10.3390/s19133007

Cited by 6 publications

(8 citation statements)

References 24 publications

(24 reference statements)

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“…The detection limit may be improved by using microelectrodes as the current density is expected to increase. Then, the mixture quantification method based on active sensing [25] instead of conventional regression techniques will work even if interference gas exists. Moreover, we are interested in studying the selectivity of atomic metal catalysts for various aroma compounds such as geraniol, nerol etc.…”

Section: Discussionmentioning

confidence: 99%

Design and Development of Amperometric Gas Sensor With Atomic Au–Polyaniline/Pt Composite

et al. 2020

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Rapid advancements in information processing and embedded systems require high selective and fast sensors. Conventional gas sensors are not suitable for the detection of isomers of organic compounds due to cross-sensitivity and the response time being limited by slow chemical kinetics. Amperometric gas sensors using conducting polymers modified with metal catalysts are a suitable and robust system due to many tunable properties. In this paper, conducting polymer polyaniline was electrochemically decorated with clusters containing precisely defined number of gold atoms to function as an electro-catalyst. The modified polymer composite showed fast reaction rate for the electro-oxidation of alcohols in both liquid and gas phases. The number of gold atoms affected the catalytic activity. Cyclic voltammograms were measured and results showed discriminable patterns between n-propanol and isopropanol even at different gas concentrations. Thus, it was demonstrated that gas sensor arrays can be realized by decorating different number of gold atoms on polyaniline electrodes, to yield defined and different selectivity. Index Terms-Amperometric gas sensor, atomic gold, conducting polymer, electro-catalyst, polyaniline, propanol I. INTRODUCTIONGas sensors have a wide range of modern applications such as their use in breath analysis to detect anomaly in a patient's health, as security devices for monitoring gas leaks, quality control in the food industry etc. [1]. Conventional gas sensors, however, are known to face some common challenges such as cross-sensitivity to humidity [2] and amperometric gas sensors are electrochemical type of gas sensors that are a more robust choice due to their several merits [3] in terms of characteristics such as low power, ease of fabrication, and the ability to perform in humid conditions. Although such sensor characteristics are attractive, they come at a cost of slow

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Section: Discussionmentioning

confidence: 99%

Design and Development of Amperometric Gas Sensor With Atomic Au–Polyaniline/Pt Composite

et al. 2020

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“…The mixture consisting of acetone, ethanol, and diethyl ether was prepared inside a sampling Teflon bag. For the analyses, flow rates of 0.05 L∕min , 0.1 L∕min , 0.15 L∕min , 0.20 L∕min, and 0.25 L∕min were used for carrying the samples into the spectrometer, with ambient air used as carrier gas [80]. Headspace formation was also the procedure selected by Jurado-Campos et al during their qualitative study.…”

Section: Ion Mobility Spectrometrymentioning

confidence: 99%

Ion Mobility Spectrometry Towards Environmental Volatile Organic Compounds Identification and Quantification: a Comparative Overview over Infrared Spectroscopy

Moura

Vassilenko

Ribeiro

2023

Emiss. Control Sci. Technol.

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Volatile organic compounds (VOCs) can be extremely toxic and hazardous to expose humans in both indoor and outdoor environments; thus, their detection, correct identification, and accurate quantification are relevant and demanding tasks that need to be addressed. Fortunately, several known analytical techniques allow the qualitative and quantitative assessment of these compounds. This review paper stresses on two independent spectroscopic techniques, infrared spectroscopy and ion mobility spectrometry, both suitable for the detection of very small concentration levels of VOCs in gaseous samples. Infrared spectroscopy is a well-known technique that has been largely applied per se or combined with additional methodologies, to study VOCs at both high and low concentration levels. On the other hand, ion mobility spectrometry gained relevance in this field, due to its capability to measure trace concentration levels, namely ppbv and even pptv. For this review paper, several scientific papers were analyzed, and the most relevant were addressed throughout the text. The working principles of both techniques are carefully addressed, and updated data is provided for highlighting the advantages and disadvantages of both techniques for the environmental VOCs assessment in air quality control.

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“…This system was improved to obtain only several data points required for gradients calculation, whereas all possible combinations of component concentrations were measured in the previous work in advance [17] (see Figure 5). However, it took a long time due to increasing measurement points (it took almost three hours).…”

Section: Data Collected Pointmentioning

confidence: 99%

“…However, the feasibility of real-time mixture quantification with FAIMS has not been confirmed. The quantification method using off-line measurement data was reported in the previous paper [17]. In this study, the on-line measurement system was developed as an extension from the previous system, and trinary gas mixtures were utilized to test the quantification performance.…”

Section: Introductionmentioning

confidence: 99%

On-Line Mixture Quantification to Track Temporal Change of Composition Using FAIMS

Yokoshiki

Nakamoto

2019

Sensors

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This paper reports on-line mixture quantification with FAIMS. Ternary gas mixtures composed of acetone, ethanol, and diethyl ether were used for quantification. We succeeded in an on-line quantification of ppm-level concentration and even sub-ppm-level gases using the gradient descent method. It took 10 minutes to quantify the ternary mixture. However, it was too long, because we aim to track the temporal change of each component concentration in the mixture. Then, an algorithm based on feedback control was introduced to reduce the quantification time. The feedback method successfully tracked concentrations in three cases. The simulation result shows that the proposed method can reduce the quantification time.

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Ternary Gas Mixture Quantification Using Field Asymmetric Ion Mobility Spectrometry (FAIMS)

Cited by 6 publications

References 24 publications

Design and Development of Amperometric Gas Sensor With Atomic Au–Polyaniline/Pt Composite

Design and Development of Amperometric Gas Sensor With Atomic Au–Polyaniline/Pt Composite

Ion Mobility Spectrometry Towards Environmental Volatile Organic Compounds Identification and Quantification: a Comparative Overview over Infrared Spectroscopy

On-Line Mixture Quantification to Track Temporal Change of Composition Using FAIMS

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