Real-time quantitative detection of styrene in atmosphere in presence of other volatile-organic compounds using a portable device

Radica, Francesco; Ventura, Giancarlo Della; Malfatti, Luca; Guidi, Mariangela Cestelli; D’Arco, Annalisa; Grilli, Antonio; Marcelli, A.; Innocenzi, Plinio

doi:10.1016/j.talanta.2021.122510

Cited by 13 publications

(18 citation statements)

References 15 publications

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“…The used technique is based on the combination of an IR Michelson interferometer and a multipass gas cell. In particular, we have calibrated the quantitative analysis in the MIR spectral region for four different VOCs (styrene, acetone, ethanol and isopropanol) focusing on its advantages compared to portable and benchtop devices used previously [11,18], in terms of both detection sensitivity and accuracy. The longer optical path (10 m) inside the multipass cell ensures an excellent S/N ratio, thus allowing the discramination of less intense vibrational bands, overcoming the limitations affecting the VOCs quantification when using conventional set ups.…”

Section: Discussionmentioning

confidence: 99%

“…The schematic experimental setup is shown in Figure 1. It is similar to the portable device described in [18], with the exception of the gas cell, that in the present case has been replaced by the GEMINI gas cell with a nominal path length of 10 m and a volume of 2 l (http://www.gascell.com/). This multipass cell, allowing us to achieve a high sensitivity in the absorbance measurements, was connected to a sealed evaporation chamber, where a commercial Photo-Ionization Detector (PID) sensor was installed for real-time monitoring of the evaporated VOC.…”

Section: Methodsmentioning

confidence: 99%

“…These bands were chosen because they are relatively intense and well resolved, and do not show significant overlaps with components of other compounds, a condition that is the prerequisite for the spectroscopic analysis of mixtures. In transmission IR spectroscopy, the absorbance of a specific band is related to the amount of the target molecule via the Beer-Lambert relationship [18]:…”

Section: Characterization and Statistic Analysismentioning

confidence: 99%

“…Nevertheless, these devices do not allow easy discrimination among different chemical agents. At variance, analytical methods based on vibrational spectroscopies such as Terahertez (THz) and Infrared (IR) based techniques are able to accomplish this goal allowing both the detection of VOCs at very low concentrations and their reliable discrimination [10] [16][17][18]. In addition, the ability of vibrational spectroscopy to analyze ambient air in real-time represents a unique feature, and this original approach is suitable for implementing portable devices.…”

Section: Introductionmentioning

confidence: 99%

“…This ensures high selectivity and sensitivity for ambient-level detection (typically in the ppb range) of common hazardous air pollutants, which are typically strong IR absorbers. In this research, we use FTIR spectroscopy in the MIR to selectively identify organic chemical compounds in air, starting from our previous study [18] where the general methodology was set up. After the first experiments by combining a dedicated PID sensor with MIR spectroscopy, we calibrated the IR technique for the quantitative analysis of a series of VOCs [18]: styrene, acetone, ethanol and isopropanol.…”

Section: Introductionmentioning

confidence: 99%

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High Sensitivity Monitoring of VOCs in Air through FTIR Spectroscopy Using a Multipass Gas Cell Setup

D’Arco

Mancini

Paolozzi

et al. 2022

Sensors

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Human exposure to Volatile Organic Compounds (VOCs) and their presence in indoor and working environments is recognized as a serious health risk, causing impairments of varying severities. Different detecting systems able to monitor VOCs are available in the market; however, they have significant limitations for both sensitivity and chemical discrimination capability. During the last years we studied systematically the use of Fourier Transform Infrared (FTIR) spectroscopy as an alternative, powerful tool for quantifying VOCs in air. We calibrated the method for a set of compounds (styrene, acetone, ethanol and isopropanol) by using both laboratory and portable infrared spectrometers. The aim was to develop a new, and highly sensitive sensor system for VOCs monitoring. In this paper, we improved the setup performance, testing the feasibility of using a multipass cell with the aim of extending the sensitivity of our system down to the part per million (ppm) level. Considering that multipass cells are now also available for portable instruments, this study opens the road for the design of new high-resolution devices for environmental monitoring.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Characterization and Statistic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High Sensitivity Monitoring of VOCs in Air through FTIR Spectroscopy Using a Multipass Gas Cell Setup

D’Arco

Mancini

Paolozzi

et al. 2022

Sensors

Self Cite

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Experimental study on synchrotron radiation photoionization of secondary organic aerosol derived from styrene ozonolysis

Huang

Wang

Shan

et al. 2023

J Chinese Chemical Soc

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Secondary organic aerosol (SOA) produced by ozonolysis of styrene and other alkene compounds is a major part of fine particles in urban atmospheres. The atmospheric ozonolysis process of styrene is simulated in a smog chamber, and the formed SOA particles are detected on-line by a synchronous radiation vacuum ultraviolet photoionization mass spectrometer (VUV-PIMS) in this study. Through molecular ion peaks in the photonionization mass spectra of SOA and the corresponding photoionization efficiency curve, combined with off-line measurement verification of ultraviolet visible and infrared absorption spectra, it is determined that formaldehyde, formic acid, benzene, phenol, benzaldehyde, and benzoic acid are the main constituents of styrene SOA. These provide new information for studying the atmospheric ozonolysis oxidation mechanism of styrene. VUV-PIMS can get over complicated sample preparation procedures, secondary pollution, and other shortcomings of the off-line method and is a useful instrument to measure constituents and unveil the formation process of SOA particles.

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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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Real-time quantitative detection of styrene in atmosphere in presence of other volatile-organic compounds using a portable device

Cited by 13 publications

References 15 publications

High Sensitivity Monitoring of VOCs in Air through FTIR Spectroscopy Using a Multipass Gas Cell Setup

High Sensitivity Monitoring of VOCs in Air through FTIR Spectroscopy Using a Multipass Gas Cell Setup

Experimental study on synchrotron radiation photoionization of secondary organic aerosol derived from styrene ozonolysis

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

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