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

Autor: C. G. Bolas, V. Ferracci, A. D. Robinson, M. I. Mead, M. S. M. Nadzir, J. A. Pyle, R. L. Jones, N. R. P. Harris
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Atmospheric Measurement Techniques, Vol 13, Pp 821-838 (2020)
Druh dokumentu: article
ISSN: 1867-1381
1867-8548
DOI: 10.5194/amt-13-821-2020
Popis: 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.
Databáze: Directory of Open Access Journals
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje