TY  - JOUR
A1  - Wagner, Andrea Christine
A1  - Bergen, Anton
A1  - Brilke, Sophia
A1  - Fuchs, Claudia
A1  - Ernst, Markus
A1  - Hoker, Jesica
A1  - Heinritzi, Martin
A1  - Simon, Mario
A1  - Bühner, Bertram
A1  - Curtius, Joachim
A1  - Kürten, Christoph Andreas
T1  - Size resolved online chemical analysis of nano aerosol particles : a thermal desorption differential mobility analyzer coupled to a chemical ionization time of flight mass spectrometer
T2  - Atmospheric measurement techniques discussions
N2  - A new method for size resolved chemical analysis of nucleation mode aerosol particles (size range from ~10 to ~30 nm) is presented. The Thermal Desorption Differential Mobility Analyzer (TD-DMA) uses an online, discontinuous principle. The particles are charged, a specific size is selected by differential mobility analysis and they are collected on a filament by electrostatic precipitation. Subsequently, the sampled mass is evaporated in a clean carrier gas and analyzed by a chemical ionization mass spectrometer. Gas phase measurements are performed with the same mass spectrometer during the sampling of particles. The characterization shows reproducible results, with a particle size resolution of 1.19 and the transmission efficiency for 15 nm particles being slightly above 50 %. The signal from the evaporation of a test substance can be detected starting from 0.01 ng and shows a linear response in the mass spectrometer. Instrument operation in the range of pg/m3 is demonstrated by an example measurement of 15 nm particles produced by nucleation from dimethylamine, sulfuric acid and water.
Y1  - 2018
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/49190
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-491904
SN  - 1867-8610
N1  - © Author(s) 2018. CC BY 4.0 License.
VL  - 11
SP  - 1
EP  - 34
PB  - Copernicus
CY  - Katlenburg-Lindau
ER  -