Authors: Schaden, Stefan; Domínguez-Vidal, Ana; Lendl, Bernhard

Source: Applied Spectroscopy, Volume 60, Issue 5, Pages 120A-148A and 471-571 (May 2006) , pp. 568-571(4)

Publisher: Society for Applied Spectroscopy

Abstract:

On-line monitoring of a model reaction was performed by employing two pulsed mid-infrared Fabry-Pérot quantum cascade lasers (QCL). The emission maxima of the QCLs were located at 1393 and 1080 cm⁻¹. An optical system of parabolic mirrors and a ZnSe beam splitter combined the two laser beams and allowed a transmission cell to be probed with both QCLs simultaneously. The reaction mixture was pumped continuously through a cell that had an optical path of 48 μm. This dual QCL system allowed fast absorption measurements of the reaction mixture at two distinct wavenumbers. The reaction under study was the oxidation of sulfite to sulfate with hydrogen peroxide acting as oxidant. On-line measurements of the chemical reaction allowed direct, real-time monitoring of sulfate formation and hydrogen peroxide depletion.

Keywords: QUANTUM CASCADE LASER; MID-INFRARED; MIR; ON-LINE MONITORING; SULFITE OXIDATION

Document Type: Miscellaneous

DOI: http://dx.doi.org/10.1366/000370206777412068

Affiliations: 1: Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164AC A-1060, Vienna, Austria

Publication date: 2006-05-01

More about this publication?

• The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge.
  
  Previously published as Bulletin (Society for Applied Spectroscopy)
• Editorial Board
• Information for Authors
• Submit a Paper
• Subscribe to this Title
• Membership Information
• Request copyrighted SAS materials
• Spectroscopic Nomenclature
• Focus Compendium
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Analytical Chemistry
• By this author: Schaden, Stefan ;  Domínguez-Vidal, Ana ;  Lendl, Bernhard

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers