Short name:
HR-ToF-AMS

Full name:
High Resolution - Time of Flight - Aerosol Mass Spectrometer

What is being measured:
Particle Elemental Composition & Fragments

Sampling Protocol:
Online

Manufacturer:
Aerodyne

Model:
HR-ToF-AMS

Instrument year :
2005

Data recording software:
Built-in DAQ programs

Data analysis software:
Custom IGOR script (Squirrel)

Raw data time resolution:
1s

Analysis data averaging:
60 ~ 90s

Detection limit:
0.003 ug/m3 in V mode; 0.05 in W mode

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:
0.08 lpm

Tubing inner diameter:
1/4'' OD; 0.152'' ID

Tubing material:
Copper

Chemical identification method:

Data analysis method:
The built-in DAQ program converts the raw data to formatted .HDF files, then those files are pulled out by a custom IGOR script and converted to its database.

Quantification method:

Calibration method:
Varied concentrations of atomized Ammonium Sulfate Particles were size-selected by a fixed-voltage SMPS and injected to AMS, then calibration curve could be built based on the real time SMPS counts and AMS mass readings.

Calibration drift estimate:
Low (on the order of weeks)

Calibration schedule:
Monthly

Uncertainty estimation method:
9999

Known interferences:
N/A

Link to supplemental information:
N/A

Additional notes:
N/A

Measurement uncertainty:
(a) Local_Time (N/A); (b) Experimental_Time (N/A); (c) O:C (+/- ?%); (d) H:C (+/- ?%); (e) f43 (+/- ?%); (f) f44 (+/- ?%)

Measurement units:
(a) Local_Time (N/A); (b) Experimental_Time (min); (c) O:C (N/A); (d) H:C (N/A); (e) f43 (N/A); (f) f44 (N/A)