Instrument - Atmospheric pressure interface toluene chemical ionization mass spectrometer
Atmospheric pressure interface toluene chemical ionization mass spectrometer
What is being measured:
Gas-phase siloxanes and oxidation products
Data recording software:
Data analysis software:
Tofwerk's TofWare and further processing with Igor scripts
Raw data time resolution:
Analysis data averaging:
Data is averaged to 1 minute resolution offline.
3x the standard deviation of the noise
Sensitivity to temperature (and correction method, if applicable):
Sensitivity to relative humidity (and correction method, if applicable):
Direct sampling with teflon tubing
Sample preparation method:
No sample preparation
Sample residence time (chamber to instrument) (seconds):
Length of tubing (cm):
Instrument flow rate:
Tubing inner diameter:
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:
Calibration drift estimate:
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.
Link to supplemental information:
Measurements have uncertainties equal to the square root of the counted ions, according to Poisson statistics.
Normalized counts per second