Instrument - High Resolution Time of Flight Aerosol Mass Spectrometer

Short name:
"Field" AMS

Full name:
High Resolution Time of Flight Aerosol Mass Spectrometer

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

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.

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: