Detection of triacetone triperoxide by thermal decomposition peroxy radical chemical amplification coupled to cavity ring-down spectroscopy

Taha, Youssef M.; Saowapon, Matthew T; Osthoff, Hans D.

Detection of triacetone triperoxide by thermal decomposition peroxy radical chemical amplification coupled to cavity ring-down spectroscopy

dc.contributor.author	Taha, Youssef M.
dc.contributor.author	Saowapon, Matthew T
dc.contributor.author	Osthoff, Hans D.
dc.date.accessioned	2021-06-21T15:49:58Z
dc.date.available	2021-06-21T15:49:58Z
dc.date.issued	2018-05-04
dc.description	This is a post-peer-review, pre-copyedit version of an article published in Analytical and Bioanalytical Chemistry. The final authenticated version is available online at: https://doi.org/10.1007/s00216-018-1072-0	en_US
dc.description.abstract	Triacetone triperoxide (TATP) is frequently used in improvised explosive devices because of its ease of manufacture and tremendous explosive force. In this paper, we describe a new method for detection of TATP, thermal decomposition peroxy radical chemical amplification cavity ring-down spectroscopy (TD-PERCA-CRDS). In this method, air is sampled through a heated inlet to which ~ 1 ppmv nitric oxide (NO) is added. To verify the purity of synthetic standards, the mid-infrared spectrum of TATP vapor was recorded. The thermal decomposition of TATP is shown to produce radicals which oxidize NO to nitrogen dioxide (NO2), whose concentration increase is monitored by optical absorption at 405 nm using a blue diode laser CRDS. The sensitivity could be improved through addition of ~ 1% ethane (C2H6), which fuels catalytic conversion of NO to NO2. The limit of detection of TD-PERCA-CRDS with respect to TATP is 22 pptv (1 s data), approximately six orders of magnitude below TATP's saturation vapor pressure. Insights into the mechanism of TATP thermal decomposition, TD-PERCA-CRDS interferences, and the suitability of TD-PERCA-CRDS as a peroxy radical explosive detection method at security check points are discussed.	en_US
dc.description.grantingagency	Natural Sciences and Engineering Research Council (NSERC)	en_US
dc.description.sponsorship	Sponsored by the Open Access Authors Fund	en_US
dc.identifier.citation	Taha, Y. M., Saowapon, M. T., & Osthoff, H. D. (2018). Detection of triacetone triperoxide by thermal decomposition peroxy radical chemical amplification coupled to cavity ring-down spectroscopy. Analytical and bioanalytical chemistry, 410(17), 4203-4212.	en_US
dc.identifier.doi	http://dx.doi.org/10.1007/s00216-018-1072-0	en_US
dc.identifier.grantnumber	RGPIN/03849-2016	en_US
dc.identifier.uri	http://hdl.handle.net/1880/113514
dc.language.iso	eng	en_US
dc.publisher	Springer	en_US
dc.publisher.department	Chemistry	en_US
dc.publisher.faculty	Science	en_US
dc.publisher.hasversion	acceptedVersion	en_US
dc.publisher.institution	University of Calgary	en_US
dc.publisher.policy	https://www.springer.com/us/open-access/authors-rights/self-archiving-policy/2124	en_US
dc.rights	Unless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.	en_US
dc.subject	Triacetone triperoxide	en_US
dc.subject	TATP	en_US
dc.subject	trace sensing	en_US
dc.subject	peroxy radical chemical amplification	en_US
dc.subject	PERCA	en_US
dc.subject	cavity ring-down spectroscopy	en_US
dc.subject	CRDS	en_US
dc.subject	mechanism of TATP thermal decomposition	en_US
dc.subject	mid-infrared spectrum	en_US
dc.title	Detection of triacetone triperoxide by thermal decomposition peroxy radical chemical amplification coupled to cavity ring-down spectroscopy	en_US
dc.type	journal article	en_US
ucalgary.item.requestcopy	false	en_US
ucalgary.scholar.level	Faculty	en_US