iDirac: a field-portable instrument for long-term autonomous measurements of isoprene and selected VOCs

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dc.contributor.authorBolas, Conor G.
dc.contributor.authorFerracci, Valerio
dc.contributor.authorRobinson, Andrew D.
dc.contributor.authorMead, Mohammed Iqbal
dc.contributor.authorNadzir, Mohd Shahrul Mohd
dc.contributor.authorPyle, John A.
dc.contributor.authorJones, Roderic L.
dc.contributor.authorHarris, Neil R. P.
dc.date.accessioned2020-02-20T14:44:24Z
dc.date.available2020-02-20T14:44:24Z
dc.date.issued2020-02-19
dc.description.abstractThe iDirac is a new instrument to measure selected hydrocarbons in the remote atmosphere. A robust design is central to its specifications, with portability, power efficiency, low gas consumption and autonomy as the other driving factors in the instrument development. The iDirac is a dual-column isothermal oven gas chromatograph with photoionisation detection (GC-PID). The instrument is designed and built in-house. It features a modular design, with the novel use of open-source technology for accurate instrument control. Currently configured to measure biogenic isoprene, the system is suitable for a range of compounds. For isoprene measurements in the field, the instrument precision (relative standard deviation) is ±10 %, with a limit of detection down to 38 pmol mol−1 (or ppt). The instrument was first tested in the field in 2015 during a ground-based campaign, and has since shown itself suitable for deployment in a variety of environments and platforms. This paper describes the instrument design, operation and performance based on laboratory tests in a controlled environment as well as during deployments in forests in Malaysian Borneo and central England.en_UK
dc.identifier.citationBolas CG, Ferracci V, Robinson AD, et al., (2020) iDirac: a field-portable instrument for long-term autonomous measurements of isoprene and selected VOCs. Atmospheric Measurement Techniques, Volume 13, February 2020, pp. 821-838en_UK
dc.identifier.issn1867-1381
dc.identifier.urihttps://doi.org/10.5194/amt-13-821-2020
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15156
dc.language.isoenen_UK
dc.publisherEuropean Geosciences Unionen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleiDirac: a field-portable instrument for long-term autonomous measurements of isoprene and selected VOCsen_UK
dc.typeArticleen_UK

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