Instrument - Gas chromatograph with flame ionization detector (Seinfeld)
Gas chromatograph with flame ionization detector (Seinfeld)
What is being measured:
Hydrocarbons, some oxygenated hydrocarbons
Data recording software:
Data analysis software:
Raw data time resolution:
depends on method (usually 10 - 20 min)
Analysis data averaging:
Sensitivity to temperature (and correction method, if applicable):
Sensitivity to relative humidity (and correction method, if applicable):
Sample preparation method:
Sample residence time (chamber to instrument) (seconds):
Length of tubing (cm):
Instrument flow rate:
Tubing inner diameter:
Chemical identification method:
Needs to be calibrated for retention time
Data analysis method:
Manually integrating peaks.
Applying sensitivity factor for each analyte.
Calibrations done by making "pillow bags" of each analyte at different concentrations and introducing the standards into the GC-FID.
Calibration drift estimate:
Low (on the order of weeks)
After changing columns
Uncertainty estimation method:
Based on precision of integration and errors in absolute concentration of standards.
Known to convert organic hydroxy hydroperoxides, hydroxy epoxides, hydroxy nitrates, and other compounds with labile groups into carbonyls. See Rivera-Rios et al. (https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014GL061919)
Link to supplemental information: