μdirac: An autonomous instrument for halocarbon measurements

Gostlow, B., Robinson, A.D., Harris, N.R.P., O'Brien, L.M., Oram, D.E., Mills, G.P., Newton, H.M., Yong, S.E. and Pyle, J.A. (2010) μdirac: An autonomous instrument for halocarbon measurements. Atmospheric Measurement Techniques, 3 (2). pp. 507-521. ISSN 1867-1381

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Abstract

We describe a new instrument (μDirac) capable of measuring halocarbons in the atmosphere. Portability, power efficiency and autonomy were critical design requirements and the resulting instrument can be readily deployed unattended on a range of platforms: long duration balloon, aircraft, ship and ground-based stations. The instrument is a temperature programmed gas chromatograph with electron capture detector (GC-ECD). The design requirements led to μDirac being built in-house with several novel features. It currently measures a range of halocarbons (including short-lived tracers having biogenic and anthropogenic sources) with measurement precision relative standard deviations ranging from ± 1% (CCl4) to ± 9% (CH3I). The prototype instrument was first tested in 2005 and the instrument has been proved in the field on technically challenging aircraft and ground-based campaigns. Results from an aircraft and a ground-based deployment are described.

Item Type: Article
Additional Information: © Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License.
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: Pure Connector
Date Deposited: 11 Jun 2014 12:24
Last Modified: 20 May 2020 23:55
URI: https://ueaeprints.uea.ac.uk/id/eprint/48353
DOI: 10.5194/amt-3-507-2010

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