Detection of dimethylamine in the low pptv range using nitrate chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometry

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Simon , M , Heinritzi , M , Herzog , S , Leiminger , M , Bianchi , F , Praplan , A , Dommen , J , Curtius , J & Kuerten , A 2016 , ' Detection of dimethylamine in the low pptv range using nitrate chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometry ' , Atmospheric Measurement Techniques , vol. 9 , no. 5 , pp. 2135-2145 . https://doi.org/10.5194/amt-9-2135-2016

Title: Detection of dimethylamine in the low pptv range using nitrate chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometry
Author: Simon, Mario; Heinritzi, Martin; Herzog, Stephan; Leiminger, Markus; Bianchi, Federico; Praplan, Arnaud; Dommen, Josef; Curtius, Joachim; Kuerten, Andreas
Contributor: University of Helsinki, Paul Scherrer Institut
University of Helsinki, Helsinki Institute of Physics
Date: 2016
Language: eng
Number of pages: 11
Belongs to series: Atmospheric Measurement Techniques
ISSN: 1867-1381
URI: http://hdl.handle.net/10138/166164
Abstract: Amines are potentially important for atmospheric new particle formation, but their concentrations are usually low with typical mixing ratios in the pptv range or even smaller. Therefore, the demand for highly sensitive gas-phase amine measurements has emerged in the last several years. Nitrate chemical ionization mass spectrometry (CIMS) is routinely used for the measurement of gas-phase sulfuric acid in the sub-pptv range. Furthermore, extremely low volatile organic compounds (ELVOCs) can be detected with a nitrate CIMS. In this study we demonstrate that a nitrate CIMS can also be used for the sensitive measurement of dimethylamine (DMA, (CH3)(2)NH) using the NO3-center dot(HNO3)(1-2)center dot(DMA) cluster ion signal. Calibration measurements were made at the CLOUD chamber during two different measurement campaigns. Good linearity between 0 and similar to 120 pptv of DMA as well as a sub-pptv detection limit of 0.7 pptv for a 10 min integration time are demonstrated at 278 K and 38% RH.
Subject: PARTICLE FORMATION EVENTS
SULFURIC ACID-AMINE
H2SO4 PRODUCTION
BOREAL FOREST
NUCLEATION
AEROSOL
AMMONIA
CLUSTERS
TRIMETHYLAMINE
RATES
114 Physical sciences
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