Instrument - Aerosol Particle Mass Analyzer - Scanning Mobility Particle Sizer
Aerosol Particle Mass Analyzer - Scanning Mobility Particle Sizer
What is being measured:
TSI3081, TSI3771, Kanomax APM-3600
Data recording software:
Data analysis software:
Custom MATLAB script
Raw data time resolution:
Analysis data averaging:
180s to 600s
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:
APM 9999; Sheath 2.5 lpm; Main 0.25 lpm
Tubing inner diameter:
1/4'' OD; 0.152'' ID
Copper, covered with temperature coat
Chemical identification method:
Data analysis method:
The APM data that were recorded in scanning mode are analyzed using a custom MATLAB script. Particle size distribution, as a function of time are displayed. Density is calculated by the selected mass and the measured volume with a perfect spherical assumption.
Signal strength is converted to partial number/size distribution by designed transfer functions. Selected mass is calculated by the given Voltage and Kanomax RPM. Density = selected mass / assumed volume based on SMPS readings.
Atomizing certain compounds with known densities to the system and create calibration curves based on the known and measured values.
Calibration drift estimate:
Uncertainty estimation method:
Duplication of the same experimental conditions.
Double peak would happen once there are two bulk composition in the sample, thus giving two densities.
Link to supplemental information:
(a) Local_Time (N/A); (b) Experimental_Time (N/A); (c) Particle_Density (+/- ?%)
(a) Local_Time (N/A); (b) Experimental_Time (min); (c) Particle_Density (g/cm3)