Instrument - High Resolution Time-of-Flight Aerosol Mass Spectrometer
Short name:
HR-ToF-AMS
Full name:
High Resolution Time-of-Flight Aerosol Mass Spectrometer
What is being measured:
Sampling Protocol:
Online
Manufacturer:
Aerodyne Research Inc.
Model:
N/A
Instrument year
:
None specified
Data recording software:
ToF-AMS DAQ 4.024beta
Data analysis software:
SQ 1.62A, PIKA 1.22A
Raw data time resolution:
1 minute
Analysis data averaging:
1 min
Detection limit:
0.003 μg/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):
0.042
Instrument flow rate:
0.08
Tubing inner diameter:
Tubing material:
Stainless Steel
Chemical identification method:
Mass spectrometer with electron impact ionization.
Data analysis method:
Quantitative
Quantification method:
Calibration method:
Ionization efficiency and relative ionization effeciencies of the instrument are calibrated with pure 300nm ammonium nitrate particles and pure 300nm ammonium sulfate particles every other week.
Calibration drift estimate:
Low (on the order of weeks)
Calibration schedule:
As Needed
Uncertainty estimation method:
By filter sampling, and from the analysis software.
Known interferences:
Air and inorganic salts can interfere with organic signals
Collection efficiency issue: particle can bounce off from the surface of the vaporizer
Link to supplemental information:
Additional notes:
Measurement uncertainty:
Measurement units: