Mobile laser spectrometer with novel resonant multipass photoacoustic cell for trace-gas sensing

被引：117

作者：

M. Nägele

M.W. Sigrist

机构：

[1] Swiss Federal Institute of Technology (ETH),

[2] Institute of Quantum Electronics,undefined

[3] Laboratory for Laser Spectroscopy and Environmental Sensing,undefined

[4] 8093 Zürich,undefined

[5] Switzerland (Fax: +41-1/633-1077,undefined

[6] E-mail: sigrist@iqe.phys.ethz.ch),undefined

来源：

Applied Physics B | 2000年 / 70卷 / 6期

关键词：

PACS: 82.Ch;

D O I：

10.1007/PL00021151

中图分类号：

学科分类号：

摘要：

The development and application of a mobile laser-photoacoustic spectrometer for in situ multicomponent monitoring of trace gases in different environments is reported. Sub-ppbV (<10-9 per volume)-concentrations can be measured with a novel resonant multipass photoacoustic cell. The cell is designed for flow mode operation in order to reduce adsorption effects. For ethene (C2H4) buffered in synthetic air a minimum detection limit of 70 ppt V (70×10-12 per volume) is achieved corresponding to a minimum measurable absorption coefficient αmin=2×10-9 cm-1 for a signal-to-noise ratio of 3. The multicomponent capability of the system is demonstrated with continuous sequential measurements of ethene, methanol, ethanol, CO2, and H2O of air from a fruit storage chamber.

引用

页码：895 / 901

页数：6