An Automated Analyzer to Measure Surface-Atmosphere Exchange Fluxes of Water Soluble Inorganic Aerosol Compounds and Reactive Trace Gases

Thomas, Rick M.; Trebs, Ivonne; Otjes, René; Jongejan, Piet A. C.; ten Brink, Harry; Phillips, Gavin; Kortner, Michael; Meixner, Franz X.; Nemitz, Eiko ORCID: https://orcid.org/0000-0002-1765-6298. 2009 An Automated Analyzer to Measure Surface-Atmosphere Exchange Fluxes of Water Soluble Inorganic Aerosol Compounds and Reactive Trace Gases. Environmental Science & Technology, 43 (5). 1412-1418. 10.1021/es8019403

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Official URL: http://pubs.acs.org/doi/abs/10.1021/es8019403

Abstract/Summary

Here, we present a new automated instrument for semicontinuous gradient measurements of water-soluble reactive trace gas species (NH3, HNO3, HONO, HCl, and SO2) and their related aerosol compounds (NH4+, NO3−, Cl−, SO42−). Gas and aerosol samples are collected simultaneously at two heights using rotating wet-annular denuders and steam-jet aerosol collectors, respectively. Online (real-time) analysis using ion chromatography (IC) for anions and flow injection analysis (FIA) for NH4+ and NH3 provide a half-hourly averaged gas and aerosol gradients within each hour. Through the use of syringe pumps, IC preconcentration columns, and high-quality purified water, the system achieves detection limits (3σ-definition) under field conditions of typically: 136/207, 135/114, 29/22, 119/92, and 189/159 ng m−3 for NH3/NH4+, HNO3/NO3−, HONO/NO2−, HCl/Cl− and SO2/SO42−, respectively. The instrument demonstrates very good linearity and accuracy for liquid and selected gas phase calibrations over typical ambient concentration ranges. As shown by examples from field experiments, the instrument provides sufficient precision (3−9%), even at low ambient concentrations, to resolve vertical gradients and calculate surface−atmosphere exchange fluxes under typical meteorological conditions of the atmospheric surface layer using the aerodynamic gradient technique.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1021/es8019403
Programmes:	CEH Programmes pre-2009 publications > Biogeochemistry > BG01 Measuring and modelling trace gas, aerosol and carbon
UKCEH and CEH Sections/Science Areas:	Billett (to November 2013)
ISSN:	0013-936X
Additional Keywords:	Inorganic gases,inorganic aerosol, fluxes, aerodynamic gradient method, ion chromatography
NORA Subject Terms:	Meteorology and Climatology Ecology and Environment Atmospheric Sciences Electronics, Engineering and Technology
Date made live:	11 May 2009 11:05 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/6587

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1021/es8019403

Programmes:

CEH Programmes pre-2009 publications > Biogeochemistry > BG01 Measuring and modelling trace gas, aerosol and carbon

UKCEH and CEH Sections/Science Areas:

Billett (to November 2013)

ISSN:

0013-936X

Additional Keywords:

Inorganic gases,inorganic aerosol, fluxes, aerodynamic gradient method, ion chromatography