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
6. Apparatus
6.1 Mass Spectrometer - The suitability of the mass spectrometer to be used with this method shall be proven by performance tests described both herein and in Practice E 137.
6.2 Sample Inlet System - Any inlet system may be used that permits the introduction of the sample without loss, contamination, or change in composition. The system must function in the range from 125 to 350°C to provide an appropriate sampling device.
6.3 Microburet or Constant-Volume Pipet.
6.4 Mass Spectrum Digitizer - It is recommended that a mass spectrum digitizer be used in obtaining the analysis, because it is necessary to use the heights of most of the peaks in the spectrum. Any digitizing system capable of supplying accurate mass numbers and peak heights is suitable.
6.5 Electronic Digital Computer - The computations for this analysis are not practical without the use of a computer. Any computer capable of providing approximately 60 K bytes in core and capable of compiling programs written in FORTRAN IV should be suitable.
7. Reagent
7.1 n-Hexadecane. (Warning - Combustible-Very harmful.)
