LEAK: description and transnational access

1. Introduction

As housing for the new Ift aerosol chamber a hall was completed in spring 2004. In this hall is built the new chamber facility LEAK. The chamber is designed for laboratory investigations of atmospheric processes such as the oxidation of organic compounds and secondary organic aerosol formation. LEAK is part of the Transnational Access of EUROCHAMP-2.

2. Description of the research facility

The simulation chamber LEAK has a cylindrical geometry, a volume of 19 m3 and is made of Teflon FEP film. LEAK is equipped with a humidifier, an ozone and a particle generator. Outlets of the chamber are connected with a condensation particle counter (CPC), a continuous monitoring ozone analyzer and a particle sampling filter device with a fixed integrated annular denuder to avoid gaseous contamination of the deposited particles during sampling. The size distributions of particles in the aerosol chamber as a function of time are measured by a differential mobility particle sizer (DMPS). An Agilent gas chromatograph (GC-MS) and a PTR-MS (Ionicon) monitor gas-phase hydrocarbon concentrations in the chamber. A variety of state-of-the-art instrumentation including NO/NO2 and ozone monitors and offline instrumentation including HPLC-ESI/ITMS, HPLC-ESI/TOFMS and GC/MS are available.

2.1. Technical data

shape cylinder
volume 19.0 m3
surface to volume ratio 2.0 m-1
lighting 56 fluorescence lamps (Eversun Super), 8 blacklight blue fluorescence lamps
temperature range 16 - 30 °C
operating pressure 750 - 1000 HPa
gas purity zero air
omaximum purge rate 12 m3/h
wall material FEP film

2.2. Images

2.3. Publications

Aerosol-chamber study of the α-pinene/O3 reaction: influence of particle acidity on aerosol yields and products, Y. Iinuma, O. Böge, T. Gnauk and H. Herrmann, Atmos. Environ. 38, 761-773 (2004)

Laboratory studies on secondary organic aerosol formation from terpenes, Y. Iinuma, O. Böge, Y. Miao, B. Sierau, T. Gnauk and H. Herrmann, Faraday Discuss. 130, 279-294 (2005)

Formation of secondary organic particle phase compounds from isoprene gas-phase oxidation products: An aerosol chamber and field study, O. Böge, Y. Miao, A. Plewka and H. Herrmann, Atmos. Environ. 40, 2501-2509 (2006)

The formation of organic sulfate esters in the limonene ozonolysis secondary organic aerosol (SOA) under acidic conditions, Y. Iinuma, C. Müller, O. Böge, T. Gnauk and H. Herrmann, Atmos. Environ. 41, 5571-5583 (2007)

Application of CE/ESI/-MS/MS analysis to structural elucidation of methylenecyclohexane ozonolysis products in the particle phase, C. Müller, Y. Iinuma, O. Böge, H. Herrmann, Electrophoresis, 28, 1364-1370 (2007)

Evidence for the existence of organosulfates in secondary organic aerosol from b-pinene ozonolysis and ambient aerosol, Y. Iinuma, C. Müller, T. Berndt, O. Böge, M. Claeys and H. Herrmann, Environ. Sci. Technol., 41, 6678-6683 (2007)

Diaterebic acid acetate and diaterpenylic acid acetate: Atmospheric tracer compounds for 1,8-cineole secondary organic aerosol, Y. Iinuma, O. Böge, M. Keywood, T. Gnauk and H. Herrmann, Environ. Sci. Technol., 43, 280-285 (2009)

Laboratory chamber studies on the formation of organosulphates from reactive uptake of monoterpene oxides, Y. Iinuma, O. Böge, A. Kahnt and H. Herrmann, Phys. Chem. Chem. Phys., 11, 7985-7997 (2009)

Terpenylic acid and related compounds from the oxidation of a-pinene: Implications for new particle formation and growth above forests, M. Claeys, Y. Iinuma, R. Szmigielski, J. D. Surratt, F. Blockhuys, C. Van Alsenoy, O. Böge, B. Sierau, Y. Gomez-Gonzalez, R. Vermeylen, P. Van der Veken, M. Shahgholi, A. W. H. Chan, H. Herrmann, J. H. Seinfeld and W. Maenhaut, Environ. Sci. Technol., 43, 6976-6982 (2009)

2.4. Access to the chamber under Eurochamp TA

Access to LEAK is provided through EUROCHAMP-2 Transnational Access and other collaborations. All necessary training and guidance will be provided, from experimental design and procedures to data analysis

3. Institution in charge of the laboratory facility

The Leibniz Institute for Tropospheric Research e.V. (IfT) was founded 1992 for the investigation of physical and chemical processes in the polluted troposphere. Meanwhile, a well-defined and globally unique research profile of IfT emerged, with a focus on aerosols, i.e. small airborne particles, and clouds. The Leibniz Institute for Tropospheric Research conducts field studies in several polluted regions parallel to the development of analytical methods for aerosol and cloud research. These tools are not only applied in field experiments but also in extensive laboratory investigations, which form a second major activity. A third and equally important approach consists of the formulation and application of numerical models that reach from process models to regional simulations of the formation, transformation and effects of tropospheric multiphase systems.

3.1. Contact Information

 Prof. Hartmut Herrmann, phone: +49 341 235 2446, fax: +49 341 235 2325

4. Additional Information