Recent development and trends in the detection of peroxide-based explosives

Wang, Weiguo; Li, Hang; Huang, Wei; Chen, Chuang; Xu, Chongxin; Ruan, Huiwen; Li, Bin; Li, Haiyang

doi:10.1016/j.talanta.2023.124763

Cited by 9 publications

(3 citation statements)

References 87 publications

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“…2,3 With the development of commercial compact vacuum ultraviolet (VUV) light sources, like 10.6 eV VUV Kr lamps, PI hyphenated to ion mobility spectrometry (IMS) or mass spectrometry (MS) has been widely employed in various on-site analysis fields such as clinical diagnosis, 4,5 food quality control, 6,7 environmental pollutant monitoring, 8,9 and national security. 10,11 Sensitivity and linear dynamic range are key parameters for evaluating the performance of analytical instruments. At ambient pressure, several issues can incluence the absorption of photons by neutral analytes and the survival of analyte ions in PI sources, causing reduced or eliminated sensitivity.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Photoionization (PI) is an efficient ionization technique that can ionize a wide range of volatile organic compounds (VOCs) with ionization energy lower than the photon energy . It produces no or very few fragment ions and demonstrates high sensitivity for unsaturated aromatic compounds. , With the development of commercial compact vacuum ultraviolet (VUV) light sources, like 10.6 eV VUV Kr lamps, PI hyphenated to ion mobility spectrometry (IMS) or mass spectrometry (MS) has been widely employed in various on-site analysis fields such as clinical diagnosis, , food quality control, , environmental pollutant monitoring, , and national security. , …”

Section: Introductionmentioning

confidence: 99%

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Improving the Sensitivity and Linear Range of Photoionization Ion Mobility Spectrometry via Confining the Ion Recombination and Space Charge Effects Assisted by Theoretical Modeling

Xu,

Yang,

Pan

et al. 2024

Anal. Chem.

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Photoionization (PI) is an efficient ionization source for ion mobility spectrometry (IMS) and mass spectrometry. Its hyphenation with IMS (PI-IMS) has been employed in various onsite analysis scenarios targeting a wide range of compounds. However, the signal intensity and linear dynamic range of PI-IMS at ambient pressure usually do not follow the Beer−Lambert law predictions, and the factors causing that negative deviation remain unclear. In this work, a variable pressure PI-IMS system was developed to examine the ion loss effects from factors like ion recombination and space charge by varying its working pressure from 1 to 0.1 bar. Assisted by theoretical modeling, it was found that ion recombination could contribute up to 90% of signal intensity loss for ambient pressure PI-IMS setups. Lowering the pressure and increasing the electric field in PI-IMS helped suppress the ion recombination process and thus an optimal pressure P optimal appeared for best signal intensity, despite the decreased net ion number density and the increased space charge effect. A simplified theoretical equation taking ion recombination as the primary ion loss factor was derived to link P optimal with analyte concentration and electric field in PI-IMS, enabling a swift optimization of the PI-IMS performance. For example, compared to ambient pressure, PI-IMS at a P optimal of 0.4 bar provided a signal intensity increment of more than 400% for 0.716 ppmv toluene and also expanded the linear dynamic range by more than two times. Revealing factors influencing the PI-IMS response would also benefit the applications of other chemical ionization sources in IMS or mass spectrometry (MS).

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving the Sensitivity and Linear Range of Photoionization Ion Mobility Spectrometry via Confining the Ion Recombination and Space Charge Effects Assisted by Theoretical Modeling

Xu,

Yang,

Pan

et al. 2024

Anal. Chem.

Self Cite

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“…Ion mobility spectrometers have been widely accepted in applications where the chemistry of ion formation is favorable for targeted analytes, including the detection of organophosphorous compounds , (OPCs) as chemical warfare agents − in military applications, and the determination of explosives − during screening of hand-held luggage in airports. In these instances, the high selectivity of ion mobility spectrometry (IMS) can be attributed to the selectivity of ionization of the sample using atmospheric pressure chemical ionization (APCI) with hydrated protons in positive polarity or oxygen anions or chloride ions in negative polarity.…”

Section: Introductionmentioning

confidence: 99%

Time-Resolved Ion Mobility Spectrometry with a Stop Flow Confined Volume Reaction Region

Anttalainen,

Karjalainen,

Lattouf

et al. 2024

Anal. Chem.

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Detection of explosives in dustbins using deep transfer learning based multiclass classifiers

Gyasi-Agyei

2024

Appl Intell

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Recent development and trends in the detection of peroxide-based explosives

Cited by 9 publications

References 87 publications

Improving the Sensitivity and Linear Range of Photoionization Ion Mobility Spectrometry via Confining the Ion Recombination and Space Charge Effects Assisted by Theoretical Modeling

Improving the Sensitivity and Linear Range of Photoionization Ion Mobility Spectrometry via Confining the Ion Recombination and Space Charge Effects Assisted by Theoretical Modeling

Time-Resolved Ion Mobility Spectrometry with a Stop Flow Confined Volume Reaction Region

Detection of explosives in dustbins using deep transfer learning based multiclass classifiers

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