Hand-held portable desorption atmospheric pressure chemical ionization ion source for in situ analysis of nitroaromatic explosives

Analytical Chemistry
Fred P M JjunjuR Graham Cooks

Abstract

A novel, lightweight (0.6 kg), solvent- and gas-cylinder-free, hand-held ion source based on desorption atmospheric pressure chemical ionization has been developed and deployed for the analysis of nitroaromatic explosives on surfaces in open air, offering portability for in-field analysis. A small, inexpensive, rechargeable lithium polymer battery was used to power the custom-designed circuitry within the device, which generates up to ±5 kV dc voltage to ignite a corona discharge plasma in air for up to 12 h of continuous operation, and allowing positive- and negative-ion mass spectrometry. The generated plasma is pneumatically transported to the surface to be interrogated by ambient air at a rate of 1-3.5 L/min, compressed using a small on-board diaphragm pump. The plasma source allows liquid or solid samples to be examined almost instantaneously without any sample preparation in the open environment. The advantages of low carrier gas and low power consumption (<6 W), as well as zero solvent usage, have aided in developing the field-ready, hand-held device for trigger-based, "near-real-time" sampling/ionization. Individual nitroaromatic explosives (such as 2,4,6-trinitrotoluene) can be easily detected in amounts as low as 5.8 ...Continue Reading

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Citations

Oct 1, 2015·Analytical Chemistry·Dalton T SnyderR Graham Cooks
Mar 7, 2017·Rapid Communications in Mass Spectrometry : RCM·Eshwar Jagerdeo, Amanda Wriston
Jan 31, 2018·Rapid Communications in Mass Spectrometry : RCM·Chia-Wei TsaiRichard A Yost
Mar 1, 2018·Rapid Communications in Mass Spectrometry : RCM·Mariya J Antony JosephStephen Taylor
Apr 18, 2018·The Analyst·Thomas P Forbes, Edward Sisco
May 7, 2019·International Journal of Analytical Chemistry·Fred P M JjunjuStephen Taylor
Jul 3, 2020·Scientific Reports·Fred P M JjunjuAbraham K Badu-Tawiah
Jul 30, 2020·Mass Spectrometry Reviews·Kenyon Evans-NguyenChristopher C Mulligan
Jun 16, 2021·Mass Spectrometry Reviews·Hanlu YueYixiang Duan
Aug 11, 2021·Scientific Reports·Preeyarad CharoensumranThanit Praneenararat
Jun 2, 2020·Analytical Chemistry·Barry L SmithSimon Maher
Jul 9, 2016·Chemical Reviews·Stamatios GiannoukosGuido F Verbeck
Jan 21, 2017·Analytical Chemistry·Patricia M PeacockSarah Trimpin

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