NOVEL DESIGN OF A RESONANT PHOTOACOUSTIC SPECTROPHONE FOR ELEMENTAL CARBON MASS MONITORING

被引：26
|
作者：
PETZOLD, A
NIESSNER, R
机构：
[1] Institute of Hydrochemistry, Technical University of Munich, D-81377 Munich
来源：
APPLIED PHYSICS LETTERS | 1995年 / 66卷 / 10期
关键词：
D O I：
10.1063/1.113271
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
An improved design of a resonant photoacoustic spectrophone is reported for aerosol absorption measurements by using a near-infrared laser diode (λ=802 nm; P=450 mW) in combination with a double-pass configuration for excitation of azimuthal modes and right-angle mounting of two electret microphones for signal detection. As a result of the new spectrophone setup a small-sized portable sensor system for real-time in situ elemental carbon monitoring is presented. The detection limit is estimated to 4.5×10-8cm-1 or 1.5 μg elemental carbon per m 3.© 1995 American Institute of Physics.
引用
收藏
页码：1285 / 1287
页数：3
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