7e95f63a-7387-472c-91d8-3f839439606f eng Ev-K2-CNR +39 035 3230511 +39 035 3230551 Via San Bernardino 145 Bergamo BG 24126 Italy metadata@evk2cnr.org http://www.evk2cnr.org/ 2012-02-28T16:23:24 ISO 19115:2003/19139 1.0 Atmospheric peroxy radicals: ROXMAS, a new massspectrometric methodology for speciated measurements of HO2 and SRO2 and first results 2002-02-10T00:00:00 International Journal of Mass Spectrometry,2002Volume 213, Issues 2–3 91-99 International Journal of Mass Spectrometry, 213, 2002.pages 91-99 1387-3806 ROXMAS (ROx Chemical Conversion/CIMS), a novel method for atmospheric speciated measurements of HO2 and the sum of organic peroxy radicals (SRO2) developed by MPI-K, has been successfully deployed in a field campaign on Monte Cimone, Italy, June-July 2000. The method relies on amplifying chemical conversion of peroxy radicals to gaseous sulfuric acid via the chain reaction with NO and SO2 and detection of the sulfuric acid by CIMS. Speciated measurements have been realized by diluting atmospheric air in either N2 or O2 buffer, thus exploiting the dependence of the conversion efficiency of RO2 to HO2 on [O2], [NO], and [SO2]. Speciated measurements of HO2 and RO2 are required to provide further insight into radical partitioning and thus to elucidate further the mechanisms of the oxidation of volatile organic compounds in the troposphere. This methodology yields useful speciated results for atmospheric conditions where CH3O2 makes a major contribution to total RO2. Under other conditions it gives an upper limit for [HO2] and a lower limit for [SRO2]. Markus Hanke Max-Planck Institute for Nuclear Physics, Atmospheric Physics Division +49 6221516488 +49 6221516324 Saupfercheckweg 1 Heidelberg 69117 Germany markus.hanke@mpi-hd.mpg.de www.mpi-hd.mpg.de Jens Uecker Max-Planck Institute for Nuclear Physics, Atmospheric Physics Division Saupfercheckweg 1 Heidelberg 69117 Germany jens.uecker@mpi-hd.mpg.de www.mpi-hd.mpg.de T. Reiner Max-Planck Institute for Nuclear Physics, Atmospheric Physics Division Saupfercheckweg 1 Heidelberg 69117 Germany www.mpi-hd.mpg.de Frank Arnold Max-Planck Institute for Nuclear Physics, Atmospheric Physics Division Saupfercheckweg 1 Heidelberg 69117 Germany frank.arnold@mpi-hd.mpg.de www.mpi-hd.mpg.de Elsevier Science Publishing Company nlinfo@sciencedirect.com http://www.elsevier.com/wps/find/homepage.cws_home https://geoportal.mountaingenius.org/geonetwork/srv/eng/resources.get?uuid=7e95f63a-7387-472c-91d8-3f839439606f&fname=mountain_witness__s.png thumbnail png SHARE ROXMAS chemical flow reactor Chemical ionization mass spectrometry (CIMS) atmospheric speciated measurements HO2 radical RO2 radical eng climatologyMeteorologyAtmosphere environment 5.865 15.0338 47.2747 55.0565 http://www.sciencedirect.com/science/article/pii/S1387380601005486 WWW:LINK-1.0-http--partners Abstract:"Atmospheric peroxy radicals: ROXMAS, a new massspectrometric methodology for speciated measurements of HO2 and SRO2 and first results." https://geoportal.mountaingenius.org/webapp/srv/en/resources.get?id=37680&fname=atmospheric_peroxy_radicals.pdf&access=private WWW:DOWNLOAD-1.0-http--download atmospheric_peroxy_radicals.pdf Full Text(pdf):"Atmospheric peroxy radicals: ROXMAS, a new massspectrometric methodology for speciated measurements of HO2 and SRO2 and first results." "Atmospheric peroxy radicals: ROXMAS, a new massspectrometric methodology for speciated measurements of HO2 and SRO2 and first results". International Journal of Mass Spectrometry, 213, 2002. Hanke, M., Uecker, J., Reiner, T., Arnold, F.