Quantum cascade laser-based photoacoustic spectroscopy of volatile chemicals: application to hexamethyldisilazane

A Elia; F Rizzi; C Di Franco; P M Lugarà; G Scamarcio

doi:10.1016/j.saa.2005.07.041

Quantum cascade laser-based photoacoustic spectroscopy of volatile chemicals: application to hexamethyldisilazane

Spectrochim Acta A Mol Biomol Spectrosc. 2006 May 15;64(2):426-9. doi: 10.1016/j.saa.2005.07.041. Epub 2006 Jan 18.

Authors

A Elia¹, F Rizzi, C Di Franco, P M Lugarà, G Scamarcio

Affiliation

¹ INFM Regional Laboratory LIT(3), Dipartimento Interateneo di Fisica Michelangelo Merlin Via Amendola 173, I-70126 Bari, Italy. angela.elia@fisica.uniba.it

PMID: 16420984
DOI: 10.1016/j.saa.2005.07.041

Abstract

The use of photoacoustic spectroscopy and mid-infrared quantum-cascade lasers (QCLs) for the detection of hexamethyldisilazane (HMDS) is reported. A detection limit of 200 parts in 10(9) is found using a Fabry-Perot QCL operated at 8.4 microm in pulsed mode and a photoacoustic cell equipped with four electret microphones. The laser multimode spectrum matches the range of the N-H bending absorption band of HMDS. Further improvements to reach lower detection limits are discussed.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Lasers*
Organosilicon Compounds / chemistry*
Photometry
Quantum Theory*
Spectroscopy, Fourier Transform Infrared
Volatilization

Substances

Organosilicon Compounds
hexamethylsilazane