Instrument - Soot Particle High Resolution Time of Flight Aerosol Mass Spectrometer

Short name:
"Lab" AMS

Full name:
Soot Particle High Resolution Time of Flight Aerosol Mass Spectrometer

What is being measured:
Particles, particle mass spectra, particle aerodynamic size

Sampling Protocol:

Aerodyne, Inc.


Instrument year :
None specified

Data recording software:

Data analysis software:
Igor Pro

Raw data time resolution:
1 s

Analysis data averaging:
20 s

Detection limit:
0.1 ug/m3

Sensitivity to temperature (and correction method, if applicable): :

Sensitivity to relative humidity (and correction method, if applicable): :

Sampling method:
Direct sampling

Sample preparation method:

Sample residence time (chamber to instrument) (seconds):

Length of tubing (cm):

Instrument flow rate:
0.1 LPM

Tubing inner diameter:
1/4 inch

Tubing material:
Stainless Steel

Chemical identification method:
Chemicals are identified by Electron Ionization mass spectra. Organics is determined by summing up organic fragments. Inorganics (ammonium, sulfate, nitrate, etc.) are determined by their ions. These species are first vaporized via 600 C tungsten vaporizer. Elemental carbon (soot particles) are vaporized using a 1064 nm intracavity YAG laser vaporizer.

Data analysis method:
Igor protocol by the Jimenez group (

Quantification method:
As reported, e.g., Zhang et al., 2005:

Calibration method:
Signal strength (ionization efficiency) calibration with 300 nm ammonium nitrate particles at varying diluted concentrations. Particle size (time of flight) calibration with 150-600 nm ammonium nitrate particles.

Calibration drift estimate:
No estimate

Calibration schedule:
As Needed

Uncertainty estimation method:
Will return to this later.

Known interferences:
Air beam (m/z 28, 44) and water signal (m/z 18)

Link to supplemental information:

Additional notes:

Measurement uncertainty:

Measurement units: