16 Jun 2020
16 Jun 2020
Atomic emission detector with gas chromatographic separation and cryogenic pre-concentration (CryoTrap-GC-AED) for atmospheric trace gas measurements
- Atmospheric Chemistry Department, MaxPlanckInstitute for Chemistry, 55128 Mainz, Germany
- Atmospheric Chemistry Department, MaxPlanckInstitute for Chemistry, 55128 Mainz, Germany
Abstract. A gas detection system has been developed, characterized and deployed for pressurized gas phase sample analyses and near real-time online measurements. It consists of a cryogenic pre-concentrator (CryoTrap), a gas chromatograph (GC), and a new high-resolution atomic emission detector (AED III). Here the CryoTrap–GC–AED instrumental setup is presented and the performance for iodine (1635 ± 135 counts I-atom-1 pptv-1), sulfur (409 ± 57 counts S-atom-1 pptv-1), carbon (636 ± 69 counts C-atom-1 pptv-1), bromine (9.1 ± 1.8 counts Br-atom-1 pptv-1) and nitrogen (28 ± 2 counts N-atom-1 pptv-1) emission lines is reported and discussed. The limits of detection (LODs) are in the low pptv range (0.5–9.7 pptv) and the signal is linear to at least 4 orders of magnitude, which makes it a suitable method for diverse volatile organic compound (VOC) measurements in the atmosphere, even in remote, unpolluted regions. The new system was utilized in a field study in a boreal forest at Hyytiälä, Finland in late summer 2016 which made monoterpene measurements possible among the other VOCs. Furthermore, pressurized global whole-air sample measurement collected onboard the Lufthansa Airbus A340-600 IAGOS-CARIBIC aircraft in the upper troposphere and lower stratosphere region was carried out with the new setup, providing the observational data of many VOCs, including the long-lived organosulfur compound carbonyl sulfide.
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Einar Karu et al.


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RC1: 'Review of Karu et al., Atomic emission detector with gas chromatographic...', Elliot Atlas, 03 Aug 2020
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AC1: 'RC1 author response', Einar Karu, 29 Sep 2020
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AC1: 'RC1 author response', Einar Karu, 29 Sep 2020
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RC2: 'Review of AMT-2020-199', Anonymous Referee #2, 26 Aug 2020
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AC2: 'RC2 author response', Einar Karu, 30 Sep 2020
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AC2: 'RC2 author response', Einar Karu, 30 Sep 2020


-
RC1: 'Review of Karu et al., Atomic emission detector with gas chromatographic...', Elliot Atlas, 03 Aug 2020
-
AC1: 'RC1 author response', Einar Karu, 29 Sep 2020
-
AC1: 'RC1 author response', Einar Karu, 29 Sep 2020
-
RC2: 'Review of AMT-2020-199', Anonymous Referee #2, 26 Aug 2020
-
AC2: 'RC2 author response', Einar Karu, 30 Sep 2020
-
AC2: 'RC2 author response', Einar Karu, 30 Sep 2020
Einar Karu et al.
Einar Karu et al.
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