ASTM D3239 Method for Aromatic Types Analysis of Gas-Oil Aromatic Fractions
ASTM D3239 Standard Test Method for Aromatic Types Analysis of Gas-Oil Aromatic Fractions by High Ionizing Voltage Mass Spectrometry
9. Procedure
9.1 If the mass spectrometer has been in continuous operation, no additional preparation is necessary before analyzing samples. However, if the spectrometer has been turned on only recently, check its operation according to the manufacturer's instructions to ensure stability before proceeding.
9.2 Obtain the mass spectrum of the sample, scanning from mass 76 to the high-mass end of the spectrum.
10. Calculations
10.1 Recording Mass Spectrum - Read peak heights and the corresponding masses for all peaks in the spectrum of the sample. Use the data, along with sample identification, as input to the computer.
