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Journal Article: ID no. (ISBN etc.):  1618-2642 BibTeX citation key:  Bechara2008
Bechara, J., Borbon, A., Jambert, C. & Perros, P. E. (2008) New off-line aircraft instrumentation for non-methane hydrocarbon measurements. IN Analytical and Bioanalytical Chemistry, 392. 865–876.
Added by: Devic 2009-09-20 21:41:12    Last Edited by: Fanny Lefebvre 2010-11-17 15:55:03
Categories: Aerosol and Chemistry
Keywords: Aerosol, Chemistry
Creators: Bechara, Borbon, Jambert, Perros
Collection: Analytical and Bioanalytical Chemistry
Bibliographies: Prior150410

Number of views:  1052
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Maturity index:  published

New off-line instrumentation was developed to implement measurements of non-methane hydrocarbons (NMHC) on (French) research aircraft. NMHC are collected on multisorbent tubes by AMOVOC (Airborne Measurements Of Volatile Organic Compounds), a new automatic sampler. AMOVOC is a versatile and portable sampler targeting a wide range of NMHC at high frequency (sampling time of 10 min). Multisorbent tubes are analyzed on the ground by short-path thermal desorption coupled with gas chromatography and mass spectrometry. The development and optimization of both NMHC sampling and analysis are reported here. On the one hand, the paper points out technical choices that were made according to aircraft constraints and avoiding sample loss or contamination. On the other hand, it describes analytical optimization, tube storage stability, and moisture removal. The method shows high selectivity, sensitivity (limit of detection less than 10 ppt) and precision (less than 24%). Finally, NMHC data collected on French aircraft during the African Monsoon Multidisciplinary Analysis campaign are reported for the first time. The results highlight instrumentation validity and protocol efficiency for NMHC measurements in the lower and upper troposphere.
Last Edited by: Fanny Lefebvre