Short name:
APM-SMPS

Full name:
Aerosol Particle Mass Analyzer - Scanning Mobility Particle Sizer

What is being measured:
Particle Density

Sampling Protocol:
Online

Manufacturer:
Home-made

Model:
TSI3081, TSI3771, Kanomax APM-3600

Instrument year :
2006

Data recording software:
Labview Program

Data analysis software:
Custom MATLAB script

Raw data time resolution:
1s

Analysis data averaging:
180s to 600s

Detection limit:
N/A

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

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

Sampling method:
Direct gas sampling

Sample preparation method:
None

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

Tubing material:
Copper, covered with temperature coat

Chemical identification method:
None

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.

Quantification method:
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.

Calibration method:
Atomizing certain compounds with known densities to the system and create calibration curves based on the known and measured values.

Calibration drift estimate:
No estimate

Calibration schedule:
Annually

Uncertainty estimation method:
Duplication of the same experimental conditions.

Known interferences:
Double peak would happen once there are two bulk composition in the sample, thus giving two densities.

Link to supplemental information:
N/A

Additional notes:
N/A

Measurement uncertainty:
(a) Local_Time (N/A); (b) Experimental_Time (N/A); (c) Particle_Density (+/- ?%)

Measurement units:
(a) Local_Time (N/A); (b) Experimental_Time (min); (c) Particle_Density (g/cm3)