Novel design of a resonant photoacoustic spectrophone for elemental carbon mass monitoring

A. Petzold, R. Niessner

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1285
Number of pages1
JournalApplied Physics Letters
DOIs
StatePublished - 1995

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