Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet: Application to HONO and NO2

Titus Gherman; Dean S. Venables; Stewart Vaughan; Johannes Orphal; Albert A. Ruth

doi:10.1021/es0716913

Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet: Application to HONO and NO₂

Titus Gherman
, Dean S. Venables
, Stewart Vaughan
, Johannes Orphal
, Albert A. Ruth

Research output: Contribution to journal › Article › peer-review

Abstract

The first application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) in the near-ultraviolet for the simultaneous detection of two key atmospheric trace species, HONO and NO₂, is reported. For both compounds the absorption is measured between 360 and 380 nm with a compact cavity-enhanced spectrometer employing a high power light-emitting diode. Oetection limits of ∼4 ppbv for HONO and ∼14 ppbv for NO₂ are reported for a static gas cell setup using a 20 s acquisition time. Based on an acquisition time of 10 min and an optical cavity length of 4.5 m detection limits of ∼0.13 ppbv and ~∼0.38 ppbv were found for HONO and NO ₂ in a 4 m³ atmospheric simulation chamber, demonstrating the usefulness of this approach for in situ monitoring of these important species in laboratory studies or field campaigns.

Original language	English
Pages (from-to)	890-895
Number of pages	6
Journal	Environmental Science and Technology
Volume	42
Issue number	3
DOIs	https://doi.org/10.1021/es0716913
Publication status	Published - 1 Feb 2008

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10.1021/es0716913

https://hdl.handle.net/10468/796Licence: CC BY-NC-ND

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title = "Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet: Application to HONO and NO2",

abstract = "The first application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) in the near-ultraviolet for the simultaneous detection of two key atmospheric trace species, HONO and NO2, is reported. For both compounds the absorption is measured between 360 and 380 nm with a compact cavity-enhanced spectrometer employing a high power light-emitting diode. Oetection limits of ∼4 ppbv for HONO and ∼14 ppbv for NO2 are reported for a static gas cell setup using a 20 s acquisition time. Based on an acquisition time of 10 min and an optical cavity length of 4.5 m detection limits of ∼0.13 ppbv and \textasciitilde{}∼0.38 ppbv were found for HONO and NO 2 in a 4 m3 atmospheric simulation chamber, demonstrating the usefulness of this approach for in situ monitoring of these important species in laboratory studies or field campaigns.",

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doi = "10.1021/es0716913",

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TY - JOUR

T1 - Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet

T2 - Application to HONO and NO2

AU - Gherman, Titus

AU - Venables, Dean S.

AU - Vaughan, Stewart

AU - Orphal, Johannes

AU - Ruth, Albert A.

PY - 2008/2/1

Y1 - 2008/2/1

N2 - The first application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) in the near-ultraviolet for the simultaneous detection of two key atmospheric trace species, HONO and NO2, is reported. For both compounds the absorption is measured between 360 and 380 nm with a compact cavity-enhanced spectrometer employing a high power light-emitting diode. Oetection limits of ∼4 ppbv for HONO and ∼14 ppbv for NO2 are reported for a static gas cell setup using a 20 s acquisition time. Based on an acquisition time of 10 min and an optical cavity length of 4.5 m detection limits of ∼0.13 ppbv and ~∼0.38 ppbv were found for HONO and NO 2 in a 4 m3 atmospheric simulation chamber, demonstrating the usefulness of this approach for in situ monitoring of these important species in laboratory studies or field campaigns.

AB - The first application of incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) in the near-ultraviolet for the simultaneous detection of two key atmospheric trace species, HONO and NO2, is reported. For both compounds the absorption is measured between 360 and 380 nm with a compact cavity-enhanced spectrometer employing a high power light-emitting diode. Oetection limits of ∼4 ppbv for HONO and ∼14 ppbv for NO2 are reported for a static gas cell setup using a 20 s acquisition time. Based on an acquisition time of 10 min and an optical cavity length of 4.5 m detection limits of ∼0.13 ppbv and ~∼0.38 ppbv were found for HONO and NO 2 in a 4 m3 atmospheric simulation chamber, demonstrating the usefulness of this approach for in situ monitoring of these important species in laboratory studies or field campaigns.

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U2 - 10.1021/es0716913

DO - 10.1021/es0716913

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EP - 895

JO - Environmental Science and Technology

JF - Environmental Science and Technology

IS - 3

ER -

Incoherent broadband cavity-enhanced absorption spectroscopy in the near-ultraviolet: Application to HONO and NO₂

Abstract

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