iDirac: a field-portable instrument for long-term autonomous measurements of isoprene and selected VOCs
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The 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.
Date Issued
2020-02-19
Date Acceptance
2020-01-14
Citation
Atmospheric Measurement Techniques, 2020, 13 (2), pp.821-838
ISSN
1867-1381
Publisher
Copernicus Publications
Start Page
821
End Page
838
Journal / Book Title
Atmospheric Measurement Techniques
Volume
13
Issue
2
Copyright Statement
© Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000516580300002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
AEROSOLS
CLIMATE
EMISSIONS
FLUXES
FOREST
Meteorology & Atmospheric Sciences
OZONE
Physical Sciences
Science & Technology
VOLATILE ORGANIC-COMPOUNDS
Publication Status
Published
Date Publish Online
2020-02-19