Instrument - Aerosol Mass Spetrometer
Aerosol Mass Spetrometer
What is being measured:
Data recording software:
Data analysis software:
Raw data time resolution:
Analysis data averaging:
3 ng/m3 for V mode; 32 ng/m3 for W mode
Sensitivity to temperature (and correction method, if applicable):
Sensitivity to relative humidity (and correction method, if applicable):
Direct gas sampling
Sample preparation method:
Sample residence time (chamber to instrument) (seconds):
Length of tubing (cm):
Instrument flow rate:
Tubing inner diameter:
Chemical identification method:
Data analysis method:
The SMPS data that were recorded in scanning mode are analyzed using a custom Excel script. Particle size distribution, number/volume concentration as a function of time are displayed. Custom wall loss fitting time is available to do wall loss correction as needed.
For V mode, ToF calculation; For W mode, the software dissects the measured peaks to several peaks of known compounds around there (precision to 0.0001 m/z) and does the statistics with time or run stamps.
Size-selected NH4NO3 particles are measured using two modes. ToF Ion Efficiency factors will be calculated based on the comparison between the data from SMPS and AMS.
Calibration drift estimate:
Low (on the order of weeks)
Uncertainty estimation method:
Duplication of the same experimental conditions.
Link to supplemental information: