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An aircraft-borne chemical ionization -� ion trap mass spectrometer (CI-ITMS) for fast PAN and PPN measurements

Roiger, Anke and Aufmhoff, Heinfried and Stock, Paul and Arnold, Frank and Schlager, Hans (2011) An aircraft-borne chemical ionization -� ion trap mass spectrometer (CI-ITMS) for fast PAN and PPN measurements. Atmospheric Measurement Techniques, 4, pp. 173-188. EGU Journals. DOI: 10.5194/amt-4-173-2011, 2011.

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Official URL: http://www.atmos-meas-tech.net/4/173/2011/amt-4-173-2011.html

Abstract

An airborne chemical ionization ion trap mass spectrometer instrument (CI-ITMS) has been developed for tropospheric and stratospheric fast in-situ measurements of PAN (peroxyacetyl nitrate) and PPN (peroxypropionyl nitrate). The first scientific deployment of the FASTPEX instrument (FASTPEX = Fast Measurement of Peroxyacyl nitrates) took place in the Arctic during 18 missions aboard the DLR research aircraft Falcon, within the framework of the POLARCAT-GRACE campaign in the summer of 2008. The FASTPEX instrument is described and characteristic properties of the employed ion trap mass spectrometer are discussed. Atmospheric data obtained at altitudes of up to ~12 km are presented, from the boundary layer to the lowermost stratosphere. Data were sampled with a time resolution of 2 s and a 2�� detection limit of 25 pmol molâ��1. An isotopically labelled standard was used for a permanent online calibration. For this reason the accuracy of the PAN measurements is better than �±10% for mixing ratios greater than 200 pmol molâ��1. PAN mixing ratios in the summer Arctic troposphere were in the order of a few hundred pmol molâ��1 and generally correlated well with CO. In the Arctic boundary layer and lowermost stratosphere smaller PAN mixing ratios were observed due to a combination of missing local sources of PAN precursor gases and efficient removal processes (thermolysis/photolysis). PPN, the second most abundant PAN homologue, was measured simultanously. Observed PPN/PAN ratios range between ~0.03 and 0.3

Document Type:Article
Title:An aircraft-borne chemical ionization -� ion trap mass spectrometer (CI-ITMS) for fast PAN and PPN measurements
Authors:
AuthorsInstitution or Email of Authors
Roiger, Ankeanke.roiger@dlr.de
Aufmhoff, Heinfriedheinfried.aufmhoff@dlr.de
Stock, Paulpaul.stock@dlr.de
Arnold, Frankfrank.arnold@mpi-hd.mpg.de
Schlager, Hanshans.schlager@dlr.de
Date:4 February 2011
Journal or Publication Title:Atmospheric Measurement Techniques
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:4
DOI:10.5194/amt-4-173-2011, 2011
Page Range:pp. 173-188
Editors:
EditorsEmail
Feist, Dietrichdfeist@bgc-jena.mpg.de
Publisher:EGU Journals
Status:Published
Keywords:CIMS, PAN, ion trap mass spectrometer
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics, Transport
HGF - Program Themes:ATM and Operation, Transport System
DLR - Research area:Aeronautics, Transport
DLR - Program:L AO - Air Traffic Management and Operation, V VS - Verkehrssystem
DLR - Research theme (Project):L - Climate, Weather and Environment, V - Verkehrsentwicklung und Umwelt (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Anke-Elisabeth Roiger
Deposited On:22 Feb 2011 09:02
Last Modified:12 Dec 2013 21:14

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