We present our single particle mass spectrometer we call SPLAT. SPLAT was designed to make possible the detection and characterization of particles down to 100nm, generate reproducible single particle mass spectra, and collect data at a high rate. The final instrument presented here is capable of characterizing individual particles down to 50nm at the rate of 20 particles per second. In SPLAT, mass spectra are generated by a two-step process, that uses a pulsed infrared laser to heat the particle and a time delayed pulsed UV laser to create ions. We describe a mode of operation that makes it possible to take advantage of the gas phase ionization of the semivolatile components of the particle, while also generating mass spectral signatures of the nonvolatile fraction, thereby providing complete particle mass spectra. We present some sample results from two field deployments of SPLAT.
Revised: May 19, 2011 |
Published: June 1, 2005
Citation
Zelenyuk A., and D.g. Imre. 2005.Single Particle Laser Ablation Time-of-Flight Mass Spectrometer: An Introduction to SPLAT.Aerosol Science and Technology 39, no. 6:554-568.PNNL-SA-44401.