|
1.
|
|
|
2.
|
Calibration of a Chemical Ionization Mass Spectrometer for the Measurement of Gaseous Sulfuric Acid
/ Kürten, Andreas (Goethe U., Frankfurt (main)) ; Rondo, Linda (Goethe U., Frankfurt (main)) ; Ehrhart, Sebastian (Goethe U., Frankfurt (main)) ; Curtius, Joachim (Goethe U., Frankfurt (main))
The accurate measurement of the gaseous sulfuric acid concentration is crucial within many fields of atmospheric science. Instruments utilizing chemical ionization mass spectrometry (CIMS) measuring H2SO4, therefore, require a careful calibration. [...]
2012 - 12 p.
- Published in : J. Phys. Chem. A 116 (2012) 6375-6386
|
|
|
3.
|
Evaporation of sulfate aerosols at low relative humidity
/ Tsagkogeorgas, Georgios (TROPOS, Leibniz) ; Roldin, Pontus (Helsinki U. ; Lund U.) ; Duplissy, Jonathan (Helsinki U. ; Helsinki Inst. of Phys.) ; Rondo, Linda (Goethe U., Frankfurt (main)) ; Tröstl, Jasmin (PSI, Villigen) ; Slowik, Jay G (PSI, Villigen) ; Ehrhart, Sebastian (Goethe U., Frankfurt (main)) ; Franchin, Alessandro (Helsinki U.) ; Kürten, Andreas (Goethe U., Frankfurt (main)) ; Amorim, Antonio (Lisbon, CENTRA) et al.
Evaporation of sulfuric acid from particles can be important in the atmospheres of Earth and Venus. However, the equilibrium constant for the dissociation of H2SO4 to bisulfate ions, which is the one of the fundamental parameters controlling the evaporation of sulfur particles, is not well constrained. [...]
2017 - 16 p.
- Published in : Atmos. Chem. Phys. 17 (2017) 8923-8938
External link: Fulltext
|
|
|
4.
|
Aerosol nucleation and growth in a mixture of sulfuric acid/alpha-pinene oxidation products at the CERN CLOUD chamber
/ Tröstl, Jasmin (PSI, Villigen) ; Bianchi, Federico (PSI, Villigen) ; Kürten, Andreas (Frankfurt U.) ; Rondo, Linda (Frankfurt U.) ; Simon, Mario (Frankfurt U.) ; Sarnela, Nina (Helsinki U.) ; Jokinen, Tuija (Helsinki U. ; TROPOS, Leibniz) ; Heinritzi, Martin (Innsbruck U.) ; Dommen, Josef (PSI, Villigen) ; Kirkby, Jasper (CERN) et al.
/CLOUD
The role of α-pinene in aerosol nucleation and growth was investigated using the CERN CLOUD chamber, a nano scanning mobility particle sizer (nanoSMPS) and several condensation particle counters (CPCs) with different diameter cut-offs. Different oxidation conditions for α-pinene - OH⋅ vs. [...]
2013 - 4 p.
- Published in : AIP Conf. Proc. 1527 (2013) 322-325
|
|
|
5.
|
Insight into Acid–Base Nucleation Experiments by Comparison of the Chemical Composition of Positive, Negative, and Neutral Clusters
/ Bianchi, Federico (PSI, Villigen) ; Praplan, Arnaud P (Helsinki U.) ; Sarnela, Nina (Helsinki U.) ; Dommen, Josef (PSI, Villigen) ; Kürten, Andreas (Goethe U., Frankfurt (main)) ; Ortega, Ismael K (Lille U.) ; Schobesberger, Siegfried (Helsinki U.) ; Junninen, Heikki (Helsinki U.) ; Simon, Mario (Goethe U., Frankfurt (main)) ; Tröstl, Jasmin (PSI, Villigen) et al.
We investigated the nucleation of sulfuric acid together with two bases (ammonia and dimethylamine), at the CLOUD chamber at CERN. The chemical composition of positive, negative, and neutral clusters was studied using three Atmospheric Pressure interface-Time Of Flight (APi-TOF) mass spectrometers: two were operated in positive and negative mode to detect the chamber ions, while the third was equipped with a nitrate ion chemical ionization source allowing detection of neutral clusters. [...]
2014 - 10 p.
- Published in : Environ. Sci. Technol. 48 (2014) 13675-13684
Fulltext: PDF;
|
|
|
6.
|
On the composition of ammonia–sulfuric-acid ion clusters during aerosol particle formation
/ Schobesberger, S (Helsinki U.) ; Franchin, A (Helsinki U.) ; Bianchi, F (PSI, Villigen) ; Rondo, L (Goethe U., Frankfurt (main)) ; Duplissy, J (Helsinki U. ; CERN) ; Kürten, A (Goethe U., Frankfurt (main)) ; Ortega, I K (Helsinki U. ; PhLAM, Villeneuve d'Ascq) ; Metzger, A (Ionicon Analytik GmbH, Innsbruck) ; Schnitzhofer, R (Innsbruck U.) ; Almeida, J (CERN) et al.
The formation of particles from precursor vapors is an important source of atmospheric aerosol. Research at the Cosmics Leaving OUtdoor Droplets (CLOUD) facility at CERN tries to elucidate which vapors are responsible for this new-particle formation, and how in detail it proceeds. [...]
2015 - 24 p.
- Published in : Atmos. Chem. Phys. 15 (2015) 55-78
Fulltext: PDF;
|
|
|
7.
|
Elemental composition and clustering behaviour of α-pinene oxidation products for different oxidation conditions
/ Praplan, A P (Helsinki U.) ; Schobesberger, S (Helsinki U.) ; Bianchi, F (PSI, Villigen ; Zurich, ETH) ; Rissanen, M P (Helsinki U.) ; Ehn, M (Helsinki U.) ; Jokinen, T (Helsinki U.) ; Junninen, H (Helsinki U.) ; Adamov, A (Helsinki U.) ; Amorim, A (SIM, University of Lisbon ; Beira Interior U., Covilha) ; Dommen, J (PSI, Villigen) et al.
This study presents the difference between oxidised organic compounds formed by α-pinene oxidation under various conditions in the CLOUD environmental chamber: (1) pure ozonolysis (in the presence of hydrogen as hydroxyl radical (OH) scavenger) and (2) OH oxidation (initiated by nitrous acid (HONO) photolysis by ultraviolet light) in the absence of ozone. We discuss results from three Atmospheric Pressure interface Time-of-Flight (APi-TOF) mass spectrometers measuring simultaneously the composition of naturally charged as well as neutral species (via chemical ionisation with nitrate). [...]
2015 - 15 p.
- Published in : Atmosph. Chem. Phys. 15 (2015) 4145-4159
Fulltext: PDF;
|
|
|
8.
|
Experimental investigation of ion–ion recombination under atmospheric conditions
/ Franchin, A (Helsinki U.) ; Ehrhart, S (CERN ; Goethe U., Frankfurt (main)) ; Leppä, J (Finnish Meteorological Inst. ; Caltech, Eng. Appl. Sci.) ; Nieminen, T (Helsinki U.) ; Gagné, S (Dalhousie U. ; York U., Canada) ; Schobesberger, S (Helsinki U.) ; Wimmer, D (Helsinki U.) ; Duplissy, J (Helsinki U.) ; Riccobono, F (PSI, Villigen) ; Dunne, E M (Finnish Meteorological Inst.) et al.
We present the results of laboratory measurements of the ion–ion recombination coefficient at different temperatures, relative humidities and concentrations of ozone and sulfur dioxide. The experiments were carried out using the Cosmics Leaving OUtdoor Droplets (CLOUD) chamber at CERN, the walls of which are made of conductive material, making it possible to measure small ions. [...]
2015 - 14 p.
- Published in : Atmosph. Chem. Phys. 15 (2015) 7203-7216
Fulltext: PDF;
|
|
|
9.
|
Technical Note: Using DEG-CPCs at upper tropospheric temperatures
/ Wimmer, D (Goethe U., Frankfurt (main) ; Helsinki U.) ; Lehtipalo, K (Helsinki U. ; Airmodus Ltd, Helsinki) ; Nieminen, T (Helsinki U.) ; Duplissy, J (Helsinki U.) ; Ehrhart, S (Goethe U., Frankfurt (main) ; CERN) ; Almeida, J (Goethe U., Frankfurt (main) ; CERN) ; Rondo, L (Goethe U., Frankfurt (main)) ; Franchin, A (Helsinki U.) ; Kreissl, F (Goethe U., Frankfurt (main)) ; Bianchi, F (PSI, Villigen ; Zurich, ETH) et al.
Over the last few years, several condensation particle counters (CPCs) capable of measuring in the sub-3 nm size range have been developed. Here we study the performance of CPCs based on diethylene glycol (DEG) at different temperatures during Cosmics Leaving OUtdoor Droplets (CLOUD) measurements at CERN. [...]
2015 - 9 p.
- Published in : Atmos. Chem. Phys. 15 (2015) 7547-7555
Fulltext: PDF;
|
|
|
10.
|
Thermodynamics of the formation of sulfuric acid dimers in the binary (H2SO4–H2O) and ternary (H2SO4–H2O–NH3) system
/ Kürten, A (Goethe U., Frankfurt (main)) ; Münch, S (Goethe U., Frankfurt (main)) ; Rondo, L (Goethe U., Frankfurt (main)) ; Bianchi, F (PSI, Villigen ; Zurich, ETH) ; Duplissy, J (CERN) ; Jokinen, T (Helsinki U.) ; Junninen, H (Helsinki U.) ; Sarnela, N (Helsinki U.) ; Schobesberger, S (Helsinki U.) ; Simon, M (Goethe U., Frankfurt (main)) et al.
Sulfuric acid is an important gas influencing atmospheric new particle formation (NPF). Both the binary $(H_2SO_4–H_2O)$ system and the ternary system involving ammonia $(H_2SO_4–H_2O–NH_3)$ may be important in the free troposphere. [...]
2015 - 21 p.
- Published in : Atmosph. Chem. Phys. 15 (2015) 10701-10721
Fulltext: PDF;
|
|
email оповещение
или подпишитесь на 
RSS-канал.