Short name:
Toluene CIMS

Full name:
Atmospheric pressure interface toluene chemical ionization mass spectrometer

What is being measured:
Gas-phase siloxanes and oxidation products

Sampling Protocol:
Online

Manufacturer:
Tofwerk/Aerodyne

Model:
APi-LTOF-CIMS

Instrument year :
2016

Data recording software:
Tofwerk's TOFDAQ

Data analysis software:
Tofwerk's TofWare and further processing with Igor scripts

Raw data time resolution:
1 Hz

Analysis data averaging:
Data is averaged to 1 minute resolution offline.

Detection limit:
3x the standard deviation of the noise

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

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

Sampling method:
Direct sampling with teflon tubing

Sample preparation method:
No sample preparation

Sample residence time (chamber to instrument) (seconds):

Length of tubing (cm):
1000

Instrument flow rate:
1.7 slpm

Tubing inner diameter:
3/16 in

Tubing material:
PFA Teflon

Chemical identification method:
m/z values are assigned chemical formulas based on high-resolution peak fitting with constrained isotopes. The identities of the chemicals are determined from what elements are expected to be present and how well the predicted isotopes match the measured distribution.

Data analysis method:

Quantification method:

Calibration method:

Calibration drift estimate:

Calibration schedule:

Uncertainty estimation method:
Uncertainty should follow counting error statistics when units are report in normalized counts per second unless otherwise specified. For calibrated compounds, uncertainty in the calibration is included via error propagation.

Known interferences:

Link to supplemental information:

Additional notes:

Measurement uncertainty:
Measurements have uncertainties equal to the square root of the counted ions, according to Poisson statistics.

Measurement units:
Normalized counts per second