iDirac: a field-portable instrument for long-term autonomous measurements of isoprene and selected VOCs
iDirac: a field-portable instrument for long-term autonomous measurements of isoprene and selected VOCs
复制标题
DOI：
10.5194/amt-13-821-2020
复制
发表时间：
2020-02
影响因子：
3.8
通讯作者：
C. Bolas;V. Ferracci;A. Robinson;M. I. Mead;M. Nadzir;J. Pyle;Roderic L. Jones;N. Harris
中科院分区：
文献类型：
--
作者：
C. Bolas;V. Ferracci;A. Robinson;M. I. Mead;M. Nadzir;J. Pyle;Roderic L. Jones;N. Harris
抽象。iDirac是一种测量远程大气中选定碳氢化合物的新仪器。坚固的设计是其规格的核心，便携性，功率效率，低油耗和自主性是仪器开发的其他驱动因素。iDirac是一种双柱恒温烘箱气相色谱仪，配有光电离检测器（GC-PID）。该仪器是在内部设计和制造的。它采用模块化设计，新颖地使用开源技术进行精确的仪器控制。目前配置为测量生物异戊二烯，该系统适用于一系列化合物。对于现场测量异戊二烯，仪器精度（相对标准偏差）为± 10%，检测限低至38 pmol mol −1（或ppt）。该仪器于2015年在一次地面活动中首次进行了实地测试，此后显示出适合在各种环境和平台中部署。本文介绍了仪器的设计，操作和性能的基础上，在受控环境中的实验室测试，以及在马来西亚婆罗洲和英格兰中部的森林部署。
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.