@article{541ae972d77543c8b7978277b57fca44,
title = "Chemical ionization quadrupole mass spectrometer with an electrical discharge ion source for atmospheric trace gas measurement",
abstract = "We present a chemical ionization quadrupole mass spectrometer (CI-QMS) with a radio-frequency (RF) discharge ion source through N2=CH3I as a source of primary ions. In addition to the expected detection of PAN, peracetic acid (PAA) and ClNO2 through well-established ion-molecule reactions with I-and its water cluster, the instrument is also sensitive to SO2, HCl and acetic acid (CH3C.O/OH) through additional ion chemistry unique to our ion source. We present ionization schemes for detection of SO2, HCl and acetic acid along with illustrative datasets from three different field campaigns underlining the potential of the CI-QMS with an RF discharge ion source as an alternative to 210Po. The additional sensitivity to SO2 and HCl makes the CI-QMS suitable for investigating the role of sulfur and chlorine chemistry in the polluted marine and coastal boundary layer.",
author = "Eger, {Philipp G.} and Frank Helleis and Gerhard Schuster and Phillips, {Gavin J.} and Jos Lelieveld and Crowley, {John N.}",
note = "Funding Information: Acknowledgements. We thank the Cyprus Ministry of Defence for the use of the base of the Cypriot National Guard at Ineia and the generous assistance of the Lara Naval Observatory staff during the CYPHEX campaign. Our thanks also go to the Department of Labour Inspection of Cyprus for helping us set up the campaign. We thank Heinz Bingemer for logistical support and use of the facilities at the Taunus Observatory during the NOTOMO campaign. We are grateful to the technical staff of SMEAR II station for technical support and ENVRIplus for partial financial support of the IBAIRN campaign. We thank Jan Schuladen for his technical assistance with the CI-QMS and the design of the TDR. We thank Thomas Kl{\"u}pfel and Jonathan Williams at the Max Planck Institute, Mainz, for the loan of a CO2 detector (LI-COR). Publisher Copyright: {\textcopyright} 2019 Author(s).",
year = "2019",
month = mar,
day = "26",
doi = "10.5194/amt-12-1935-2019",
language = "English",
volume = "12",
pages = "1935--1954",
journal = "Atmospheric Measurement Techniques",
issn = "1867-1381",
publisher = "Copernicus Publications",
number = "3",
}