Instrument - High Resolution Time-of-Flight Aerosol Mass Spectrometer
High Resolution Time-of-Flight Aerosol Mass Spectrometer
What is being measured:
Aerodyne Research Inc.
Data recording software:
ToF-AMS DAQ 4.024beta
Data analysis software:
SQ 1.62A, PIKA 1.22A
Raw data time resolution:
Analysis data averaging:
Sensitivity to temperature (and correction method, if applicable):
Sensitivity to relative humidity (and correction method, if applicable):
Sample preparation method:
Sample residence time (chamber to instrument) (seconds):
Length of tubing (cm):
Instrument flow rate:
Tubing inner diameter:
Chemical identification method:
Mass spectrometer with electron impact ionization.
Data analysis method:
Ionization efficiency and relative ionization effeciencies of the instrument are calibrated with pure 300nm ammonium nitrate particles and pure 300nm ammonium sulfate particles every other week.
Calibration drift estimate:
Low (on the order of weeks)
Uncertainty estimation method:
By filter sampling, and from the analysis software.
Air and inorganic salts can interfere with organic signals Collection efficiency issue: particle can bounce off from the surface of the vaporizer
Link to supplemental information: