Controlled inert gas environment for enhanced chlorine and fluorine detection in the visible and near-infrared by laser-induced breakdown spectroscopy

Asimellis, G; Hamilton, S; Giannoudakos, A; Kompitsas, M

dc.contributor.author	Asimellis, G	en
dc.contributor.author	Hamilton, S	en
dc.contributor.author	Giannoudakos, A	en
dc.contributor.author	Kompitsas, M	en
dc.date.accessioned	2014-03-01T02:43:11Z
dc.date.available	2014-03-01T02:43:11Z
dc.date.issued	2005	en
dc.identifier.issn	0584-8547	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31285
dc.subject	Controlled ambient environment	en
dc.subject	Halogen detection	en
dc.subject	Infrared laser-induced breakdown spectroscopy	en
dc.subject.classification	Spectroscopy	en
dc.subject.other	Air pollution	en
dc.subject.other	Chemical warfare	en
dc.subject.other	Chlorine	en
dc.subject.other	Drug products	en
dc.subject.other	Fluorine	en
dc.subject.other	Hazardous materials	en
dc.subject.other	Infrared radiation	en
dc.subject.other	Laser applications	en
dc.subject.other	Light emission	en
dc.subject.other	Quantum efficiency	en
dc.subject.other	Resonance	en
dc.subject.other	Ultraviolet devices	en
dc.subject.other	Chemical weapons	en
dc.subject.other	Controlled ambient environment	en
dc.subject.other	Halogen detection	en
dc.subject.other	Infrared laser-induced breakdown spectroscopy	en
dc.subject.other	Infrared spectroscopy	en
dc.title	Controlled inert gas environment for enhanced chlorine and fluorine detection in the visible and near-infrared by laser-induced breakdown spectroscopy	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.sab.2005.05.035	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.sab.2005.05.035	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Efficient quantitative detection for halogens is necessary in a wide range of applications, ranging from pharmaceutical products to air polluting hazardous gases or organic compounds used as chemical weapons. Detection of the non-metallic elements such as fluorine (F) and chlorine (Cl) presents particular difficulty, because strong emission lines originating from their resonance states lie in the VUV spectral range (110-190 nm). In the present work we detect F and Cl in the upper visible and in the near IR (650-850 nm) under controlled inert gas ambient atmosphere. Investigation of the controlled atmosphere effects suggests that there exists an optimum pressure range that optimizes signal strength and quality. Ablation and ionization were achieved with a UV laser at 355 nm, and a gated GaAs photocathode-based detector was used for detection with quantum efficiency in the range of 20% in the wavelengths of interest. Our results indicate that our approach provides quantitative detection with linearity over at least two orders of magnitude that is achieved without the need for Internal Standardization Method, and improved limits of detection. In particular, fluorine has been detected for concentration values down to 0.03 wt.% Definite spectral assignment revealing all major emission lines centered around 837 nm for F and 687 nm for Cl has been obtained for the first time in Laser-induced breakdown spectroscopy application. (c) 2005 Elsevier B.V. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Spectrochimica Acta - Part B Atomic Spectroscopy	en
dc.identifier.doi	10.1016/j.sab.2005.05.035	en
dc.identifier.isi	ISI:000232640700031	en
dc.identifier.volume	60	en
dc.identifier.issue	7-8	en
dc.identifier.spage	1132	en
dc.identifier.epage	1139	en