Continuous wave cavity ring-down spectroscopy measurement of NO2 mixing ratios in ambient air

Research output: Contribution to journalArticle (Academic Journal)peer-review

40 Citations (Scopus)

Abstract

The performance of a continuous wave diode laser based cavity ring-down (CRD) spectrometer is demonstrated for retrieval of NO2 mixing ratios in ambient air. Measurements are made at wavelengths around 410 nm, a region free from other spectroscopic interferences, and the instrument is shown to be capable of quantitative and precise NO2 mixing ratio determinations without any requirement for calibration. The minimum concentration of NO2 that can be measured by the spectrometer is estimated to be 0.1 ppbv (parts per billion by volume) in 50 s at atmospheric pressure. Using dynamic dilution of a standard NO2 sample, the performance of the spectrometer has been validated for NO2 measurements over the range of 0.2 to 80 ppbv. NO2 measurements performed directly on laboratory air are compared with data obtained with a calibrated chemiluminescence instrument and shown to be in excellent agreement.

Translated title of the contributionContinuous wave cavity ring-down spectroscopy measurement of NO2 mixing ratios in ambient air
Original languageEnglish
Pages (from-to)1595-1600
Number of pages6
JournalAnalyst
Volume130
Issue number12
DOIs
Publication statusPublished - 2005

Fingerprint Dive into the research topics of 'Continuous wave cavity ring-down spectroscopy measurement of NO<sub>2</sub> mixing ratios in ambient air'. Together they form a unique fingerprint.

Cite this