Microfabricated vapor preconcentrator for portable ion mobility spectroscopy

Martin, Michael; Crain, Mark M.; Walsh, Kevin M.; McGill, R. Andrew; Houser, Eric J.; Stepnowski, Jennifer L.; Stepnowski, S.; Wu, Houzheng; Ross, Stuart K.

doi:10.1016/j.snb.2007.03.040

Cited by 60 publications

(27 citation statements)

References 11 publications

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“…Also, the construction of miniature-sized sample vapor preconcentrator prototype interface of IMS for trace explosive detection has been recently published. With TNT used as sample the magnitude sensitivity enhanced by an order (Martin et al, 2007a).…”

Section: A Solid Phase Microextraction (Spme)mentioning

confidence: 99%

Ion spectrometric detection technologies for ultra‐traces of explosives: A review

Mäkinen

Nousiainen

Sillanpää

2011

Mass Spectrometry Reviews

146

102

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In recent years, explosive materials have been widely employed for various military applications and civilian conflicts; their use for hostile purposes has increased considerably. The detection of different kind of explosive agents has become crucially important for protection of human lives, infrastructures, and properties. Moreover, both the environmental aspects such as the risk of soil and water contamination and health risks related to the release of explosive particles need to be taken into account. For these reasons, there is a growing need to develop analyzing methods which are faster and more sensitive for detecting explosives. The detection techniques of the explosive materials should ideally serve fast real-time analysis in high accuracy and resolution from a minimal quantity of explosive without involving complicated sample preparation. The performance of the in-field analysis of extremely hazardous material has to be user-friendly and safe for operators. The two closely related ion spectrometric methods used in explosive analyses include mass spectrometry (MS) and ion mobility spectrometry (IMS). The four requirements-speed, selectivity, sensitivity, and sampling-are fulfilled with both of these methods.

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Section: A Solid Phase Microextraction (Spme)mentioning

confidence: 99%

Ion spectrometric detection technologies for ultra‐traces of explosives: A review

Mäkinen

Nousiainen

Sillanpää

2011

Mass Spectrometry Reviews

146

102

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“…There have been numerous reports of preconcentration interfaces for IMS [6], including SPME [7][8][9], stir-bar sorptive sampling [10], and microfabricated vapor preconcentration [11]. Interestingly, the microfabricated concentrator was coated with a selective strong hydrogenbond polymer (hexafluoroisopropanol fuctionalized carbosilane); however, with the exception of the work described in this paper, which focused principally on the microfabrication aspects, the interfaces described above yield only nonselective concentration.…”

Section: Introductionmentioning

confidence: 96%

Selective sampling with direct ion mobility spectrometric detection for explosives analysis

Harvey

Ewing

Waltman

2009

Int. J. Ion Mobil. Spec.

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This study investigates the potential and limitations of a field-deployable analytical approach that involves selective capture of explosive materials with direct analysis by ion mobility spectrometry (IMS). Selective capture of explosives was performed on deactivated quartz fiber filters impregnated with metal β-diketonate polymers. These Lewis acidic polymers selectively interact with Lewis base analytes such as explosives. The filters were directly inserted into an IMS instrument for analysis. The uptake kinetics of 2,4,6-trinitrotoluene (TNT) from a saturated atmosphere were characterized, and based on these studies, passive equilibrium sampling was applied to estimate the TNT concentration within an ammunition magazine that contained bulk TNT. Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) uptake from a saturated environment also was examined over a one-month period. Each incremental sampling period showed increasing quantities of RDX culminating with collection of approximately 5 ng of RDX on the filter at the end of one month. This is the first time that gas-phase uptake of RDX has been demonstrated.

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“… metal fibres covered with an adsorbing material [6],  cylindrical tube coated with thin layer of a resistively heated material [6],  micro-electro-mechanical structures (MEMS) [7],  perforated polyimide hotplates [8][9][10][11][12],  3D planar concentrator [13,14],  chemical devices [15].…”

Section: Introductionmentioning

confidence: 99%

Explosives Vapors–Concentrating and Optoelectronic Detection

Wojtas¹,

Rutecka²,

Popiel³

et al. 2014

Metrology and Measurement Systems

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Detection of explosives vapors is an extremely difficult task. The sensitivity of currently constructed detectors is often insufficient. The paper presents a description of an explosive vapors concentrator that improves the detection limit of some explosives detectors. These detectors have been developed at the Institute of Optoelectronics. The concentrator is especially dedicated to operate with nitrogen oxide detectors. Preliminary measurements show that using the concentrator, the recorded amount of nitrogen dioxide released from a 0.5 ng sample of TNT increases by a factor of approx. 20. In the concentrator an induction heater is applied. Thanks to this and because of the miniaturization of the container with an adsorbing material (approx. 1 cm 3 ), an extremely high rate of temperature growth is achieved (up to 500 °C within approx. 25 s). The concentration process is controlled by a microcontroller. Compact construction and battery power supply provide a possibility of using the concentrator as a portable device.

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Microfabricated vapor preconcentrator for portable ion mobility spectroscopy

Cited by 60 publications

References 11 publications

Ion spectrometric detection technologies for ultra‐traces of explosives: A review

Ion spectrometric detection technologies for ultra‐traces of explosives: A review

Selective sampling with direct ion mobility spectrometric detection for explosives analysis

Explosives Vapors–Concentrating and Optoelectronic Detection

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