Tropospheric Chemistry: VOC Instruments

VOCUS Inlet for Aerosols – VOCUS - Long Time-of-Flight (VIA-VOCUS-LTOF)

VIA-VOCUS-LTOF: one instrument for VOC PM composition - partitioning - highly oxidized VOCs

Coming soon! Instrument on order.

Principle of the Measurement

Gas phase: chemical ionization time-of-flight mass spectrometer
Aerosol phase VIA: thermal desorption evaporation particles into gas phase
Aerosol phase EESI: Extractive Electrospray Ionization

Species Measured

Chemically detailed aerosol and trace gas composition

Time Response

Gas phase: 10Hz
Aerosol phase VIA: 0.1Hz
Aerosol phase EESI: 1Hz


TOFWERK Vocus PTR-TOF proton transfer reaction mass spectrometer (PTR-MS) time-of flight (TOF) instrument


Carsten Warneke, Matt Coggon, Chelsea Stockwell