6533b83afe1ef96bd12a77e8
RESEARCH PRODUCT
Instrument Characterization and First Application of the Single Particle Analysis and Sizing System (SPASS) for Atmospheric Aerosols
Nicoló OmenettoPaolo CavalliJean-philippe PutaudN. ErdmannRita Van DingenenFrank RaesCarsten GrüningA. Dell'acquasubject
business.industryChemistryInstrumentationSingle particle analysisMass spectrometryLaserPollutionSizinglaw.inventionAerosolOpticslawEnvironmental ChemistryParticleGeneral Materials SciencebusinessParticle beamdescription
We describe here the instrumental setup and first experiments with the mobile single particle analysis and sizing system (SPASS) for the on-line characterization of single atmospheric aerosol particles. Aerosols are introduced into the SPASS via a differentially pumped particle inlet system using an aerodynamic lens that forms a narrow particle beam. The particles are sized with a two-laser velocimeter and subsequently desorbed and ionized with a high-power pulsed Nd:YAG laser operating at 266 nm. Positive and negative ions formed are simultaneously detected in a bipolar time-of-flight mass spectrometer. Thus, the size and chemical composition of single aerosol particles can be characterized simultaneously in real time. The SPASS system has been installed inside a truck, creating a mobile unit. The performance of the SPASS in terms of mass resolution and sizing capabilities of the laser velocimeter has been evaluated. Positive and negative mass spectra from different types of particles have been obtained ...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-05-01 | Aerosol Science and Technology |