| Autor: |
Bolas, Conor G., Ferracci, Valerio, Robinson, Andrew D., Mead, Mohamad I., Mohd Nadzir, Mohd Shahrul, Pyle, John A., Jones, Roderic L., Harris, Neil R. P. |
| Předmět: |
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| Zdroj: |
Atmospheric Measurement Techniques Discussions; 2019, p1-21, 21p |
| Abstrakt: |
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 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 ± 11 %, with a limit of detection down to 38 pmol mol-1 (or ppt). The instrument was first tested in the field in 2015 in 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, and during deployments in forests in Malaysian Borneo and in Central England. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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