ASTM D6591 – Determination of Aromatic Hydrocarbon Types in Middle Distillates by High Performance Liquid Chromatography with Refractive Index Detection

Analyzer Description

HPLC Configuration:
Vacuum degasser, quaternary pump, automatic liquid sampler, thermostatted column compartment, 6-port switching valve, 2-columns, refractive index detector
Sample type:
Diesel fuels and petroleum distillates boiling in the range from 150° to 400° C
Compounds Separated:
Mono-aromatic hydrocarbons (MAH), di-aromatic hydrocarbons (DAH), poly-aromatic hydrocarbons (PAH)
Concentration Range:
4 to 40 mol% for mono-aromatic hydrocarbons
0 to 20 mol% for di-aromatic hydrocarbons
0 to 26 mol% polycyclic aromatic hydrocarbons
Methods met:
ASTM D6591, Wasson-ECE W1671

Typical Chromatogram

FID Chromatogram

Key Features and Benefits

  • The degasser reduces baseline drift and excessive noise.
  • A column switching valve is included for the selection of alternate analytical methods without the need to physically swap columns.
  • Approximately a 15 minute analysis time.