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Anal Chim Acta

Title:		Allylated cyclodextrins as effective affinity materials in chemical sensing of volatile aromatic hydrocarbons using an optical planar Bragg grating sensor
Author(s):		Girschikofsky M; Rosenberger M; Belle S; Brutschy M; Waldvogel SR; Hellmann R;
Address:		"University of Applied Sciences Aschaffenburg, Aschaffenburg, Germany. maiko.girschikofsky@h-ab.de"
Journal Title:		Anal Chim Acta
Year:		2013
Volume:		20130703
Issue:
Page Number:		51 - 59
DOI:		10.1016/j.aca.2013.06.042
ISSN/ISBN:		1873-4324 (Electronic) 0003-2670 (Linking)
Abstract:		"We report on the application of perallyl-substituted alpha-, beta- and gamma-cyclodextrins to an optical planar Bragg grating refractive index sensor for the effective sensitization of the sensor for airborne volatile aromatic hydrocarbons. Thereby, the emphasis of this work lies on the comparison of the different cyclodextrin types regarding their suitability as affinity material assessed by the sensors sensitivity and response behavior. The opto-chemical sensor device showed an immediate and quick response to the application of the investigated analytes benzene, toluene and m-xylene as well as a linear dependence on the concentration of those analytes. Studies on the sensors sensitivity depending on the applied cyclodextrin types revealed a generally higher sensitivity for the sensor sensitized with perallyl-substituted beta-cyclodextrins. Here, the sensor systems detection limit was found to 60+/-4 ppm for benzene, 18+/-3 ppm for toluene and 3.8+/-0.5 ppm for m-xylene. The response time and recovery time were found to approximately 30s and 40s, respectively, depending on the applied cyclodextrin and the chosen analyte"
Keywords:		"Allyl Compounds/*chemistry Cyclodextrins/*chemistry Hydrocarbons, Aromatic/*analysis Volatile Organic Compounds/*analysis Allylated cyclodextrin Bragg grating Gas detection Optical sensor Volatile aromatic hydrocarbons;"
Notes:		"MedlineGirschikofsky, M Rosenberger, M Belle, S Brutschy, M Waldvogel, S R Hellmann, R eng Research Support, Non-U.S. Gov't Netherlands 2013/07/31 Anal Chim Acta. 2013 Aug 12; 791:51-9. doi: 10.1016/j.aca.2013.06.042. Epub 2013 Jul 3"