A laser-based FAIMS detector for detection of ultra-low concentrations of explosives

Akmalov, Artem E.; Chistyakov, A. A.; Kotkovskii, Gennadii E.; Sychev, Alexey V.; Tugaenko, A. V.; Bogdanov, Artem S.; Perederiy, Anatoly N.; Spitsyn, E. M.

doi:10.1117/12.2049820

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…It is noteworthy that the optimum value of intensity is close to 3 * 10 с . Interestingly, this value coincides with that one obtained in the work [18] as optimal for a nanosecond laser.…”

Section: Optimization Of Laser Intensitysupporting

confidence: 89%

A method for detecting ultra-low quantities of explosives with use a picosecond laser FAIMS analyzer

et al. 2015

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A method for detecting ultralow quantities of explosives in air with use a state-of-the-art picosecond chip Nd 3+ :YAG laser has been developed. The method combines field asymmetric ion mobility spectrometry (FAIMS) with laser ionization of examined air samples. Radiation of λ = 266nm, τ pulse = 300ps, E pulse = 30-150μJ, ν = 20-300Hz was used. Processes in the ion source for the use both picosecond and nanosecond ionization modes were analyzed. Parameters of the laser ion source have been specially optimized. The dependences on frequency, pulse energy, peak intensity, and average power for trinitrotoluene (TNT) and cyclotrimethylenetrinitramine (RDX) were obtained. It was shown that the optimal peak intensity should be no less 3·10 6 W/cm 2 . The detected ion signals for all explosives were shown to be threefold higher for picosecond excitation in comparison with use a nanosecond laser of the same average power. The estimated detection threshold of the prototype equals 1 . 10 -15 g/cm 3 . The results are promising for the development of a highly sensitive, portable laser explosive detector.

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“…It is noteworthy that the optimum value of intensity is close to 3 * 10 с . Interestingly, this value coincides with that one obtained in the work [18] as optimal for a nanosecond laser.…”

Section: Optimization Of Laser Intensitysupporting

confidence: 89%

A method for detecting ultra-low quantities of explosives with use a picosecond laser FAIMS analyzer

et al. 2015

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“…Laser pulse energy was controlled with a power meter (Ophir NOVA II). Laser source parameters were chosen to be similar to recently developed laser (repetition rate up to 10 Hz and pulse energies up to 4 mJ, 290 × 143 × 95 mm, 2.6 kg with power supply) tested as ionization source for a commercial FAIMS prototype [4]. Vapor generators of RDX and PETN in configuration 1 (Figure 1b) were heated by flexible nichrome wire heater, heating power was controlled to maintain stable temperature (50℃ for RDX, 45℃ for PETN).…”

Section: Instrumentationmentioning

confidence: 99%

“…One of the possible ways to improve the analytical performance of ion mobility spectrometry is usage of ionization sources that implement new or additional ionization mechanisms and have higher selectivity, higher sample ionization efficiency and supplementing the IMS-based instrumentation (FAIMS) with new functionality. Therefore, the use of laser radiation in IMS (FAIMS) as a flexible, multi-parameter and easily adjustable tool (by wavelength, intensity, nearly unlimited length and diameter of ionization area, pulse repetition rate) for ionization and possible desorption [4] of explosive traces deserves special attention. This opportunity can be used in practice, especially for out-of-laboratory detection of vapors and traces of explosives.…”

Section: Introductionmentioning

confidence: 99%

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Use of dopants for detection of vapors of explosives by laser field asymmetric ion mobility spectrometer

Akmalov

Chistyakov²,

Kotkovskii³

et al. 2022

Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies VI

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Ion mobility spectrometry (IMS) today figures prominently among analytical methods for detection of explosives and is widely used for transport security. This method is highly appreciated for capability to distinguish low quantity of different types of explosives at atmospheric pressure. The main obstacle for sensing some kinds of explosives is their very low vapor pressure so that the limit of detection of state-of-the-art IMS instrumentation 10-13 –10-14 g/cm3 lacks at least an order of magnitude. In this paper we combine promising UV laser radiation along with application of organic compounds (dopants) to improve ionization efficiency and vapor detection capabilities of IMS. Dopants with low ionization energy (toluene and 1-methylnaphtalene) were used for negative ion formation of nitro group-based explosives: trinitrotoluene (TNT), cyclotrimethylenetrinitramine (RDX) and pentaerythritol tetranitrate (PETN). Presence of dopants in the sample results in multiple growth of ion yield at laser intensities lower than 2 × 107 W/cm2. Limits of detection with dopant-assisted laser ionization (4.7 × 10-16 g/cm3 for RDX and 9.8 × 10-15 g/cm3 for PETN) show up to 2-fold improvement compared with no dopant case. Results propose a way to further improve sensitivity of detectors and reduce manufacturing costs by lowering requirements to laser pulse energy and using cheaper lasers.

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“…The recent renaissance of ion mobility spectrometry (IMS), thanks to advances in instrumentation and method development, has allowed the rediscovery of this method. 16 Ion mobility spectrometry has a wide range of applications, including chemical weapon monitoring, 17 detection of explosives, 18,19 air analysis, 20 security, 21,22 food quality analysis, 23 environmental analysis, 24 process control, 25 medical diagnostics, 26 proteomic analysis, 27 biological and clinical analysis, 28 and others. Another important advantage is that standalone IMS instrumentation can be made very compact 29,30 because it does not require the same vacuum as a mass spectrometer.…”

Section: Introductionmentioning

confidence: 99%

Rapid Identification of Triphenylmethane Dyes by Ion Mobility Time-of-Flight Mass Spectrometry

Сысоев

Poteshin

Chernyshev

2016

Eur J Mass Spectrom (Chichester)

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An ion mobility time-of-flight mass spectrometry (IM-TOFMS)-based method has been preliminarily investigated for the identification of triphenylmethane ballpoint pen dyes on paper. The dyes were sampled from one-year-old ballpoint pen ink entries. The entries were written on paper documents stored in the dark in a bookcase. Sample solutions were prepared by extraction of dyes in a vial. Basic violet 2, Methyl violet 6B, Methyl violet 2B and Crystal violet were characterized by IM-TOFMS. Since the ballpoint ink dyes contain ionic compounds, the studied compounds were expected to form stable peaks in the atmospheric pressure drift tube ion mobility spectrometry, and this was experimentally verified. The studied dyes produce [M - Cl] ions in electrospray and form stable individual mass-selective reduced mobility peaks. The values of the characteristic reduced mobility are: 1.187 cm/(V·s) for Basic violet 2 (m/z 330.20), 1.165 cm/(V·s) for Methyl violet 6B (m/z 344.21), 1.156 cm/(V·s) for Methyl violet 2B (m/z 358.23), 1.123 cm/(V·s) for Crystal violet (m/z 372.24). IM-TOFMS is expected to be a promising tool for fast and reliable analysis of dyes in complex matrixes.

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A laser-based FAIMS detector for detection of ultra-low concentrations of explosives

Cited by 3 publications

References 7 publications

A method for detecting ultra-low quantities of explosives with use a picosecond laser FAIMS analyzer

A method for detecting ultra-low quantities of explosives with use a picosecond laser FAIMS analyzer

Use of dopants for detection of vapors of explosives by laser field asymmetric ion mobility spectrometer

Rapid Identification of Triphenylmethane Dyes by Ion Mobility Time-of-Flight Mass Spectrometry

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