Gas Chromatography (GC) – Agilent Technologies 7890B GC with Gas Sampling Valve (GSV)

• System components:
  • Thermal Conductivity Detector (TCD) at the back
  • Flame Ionization Detector (FID) at the front
  • Gas sampling valve with 0.5 ml TCD loop and 0.25 ml FID loop
  • PPI inlet (purged packed inlet) for TCD gas line
  • CAP SSL inlet (capillary split/splitless inlet) for FID gas line
  • HayeSep packed column for TCD gas line
  • HP-5 capillary column for FID gas line
  • OpenLab CDS ChemStation software
• Carrier gas: helium
• Electronic pneumatic control (EPC) modules
• Maximum oven temperature: 290 °C
• Thermal Conductivity Detector (TCD):
  • Linear dynamic range: > 10⁵ ± 5%
  • Maximum temperature: 300 °C
  • Standard EPC for 2 gases (He, H2, or N2 matched to carrier gas type)
  • Make-up gas: 0 to 12 ml/min
  • Reference gas: 0 to 100 ml/min
• Flame Ionization Detector (FID):
  • Linear dynamic range: > 10⁷ ± 10%
  • Maximum temperature: 300 °C
  • Standard EPC for 3 gases (air, H2, make-up gas)
  • Air: 0 to 800 ml/min
  • H2: 0 to 100 ml/min
  • Make-up gas: 0 to 100 ml/min
• HayeSep packed column:
  • Temperature range: -60 °C to 290 °C
  • Feature: 3 m x 1/8 inch x 2 mm; packed with HayeSep DB 80-100 Mesh
  • In: PPI inlet; Out: TCD detector at the back
• HP-5 capillary column:
  • Temperature range: -60 °C to 325 °C
  • Feature: 30 m x 320 µm x 0.25 µm
• In: CAP SSL inlet; Out: FID detector at the front

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