Technical note: Detection of dimethylamine in the low pptv range using nitrate Chemical Ionization-Atmospheric Pressure interface-Time Of Flight (CI-APi-TOF) mass spectrometry

  • 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)2NH) using the NO3−•(HNO3)1 − 2• (DMA) cluster ion signal. Calibration measurements were made at the CLOUD chamber during two different measurement campaigns. Good linearity between 0 and  ∼  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.

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Author:Mario Simon, Martin HeinritziGND, Stephan Herzog, Markus Leiminger, Federico Bianchi, Arnaud Patrick Praplan, Josef Dommen, Joachim CurtiusORCiD, Andreas KürtenORCiDGND
Parent Title (English):Atmospheric measurement techniques discussions
Place of publication:Katlenburg-Lindau [u.a.]
Document Type:Article
Date of Publication (online):2016/12/12
Date of first Publication:2015/12/17
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2016/12/12
Page Number:28
First Page:13257
Last Page:13482
Institutes:Geowissenschaften / Geographie / Geowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Licence (German):License LogoCreative Commons - Namensnennung 3.0