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GC Detector, Agilent (HP)…

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GC Detector, Agilent (HP) 6890 FID

GC Detector, Agilent (HP) 6890 FID

The flame ionization detector (FID) responds to compounds that produce ions when burned in a H2/air flame. These include all organic compounds, although a few (e.g., formic acid, acetaldehyde) exhibit poor sensitivity.

Compounds producing little or no response include:

  • Rare gases,

  • N2 Nitrogen Oxides, CO *CCl4

  • Silicon Halides, CO2

  • H2O CS2

  • NH3 O2 *

Measured at the jet tip.

This selectivity can be advantageous: for example, H2O or CS2, used as solvent, do not produce large solvent peaks.

The system is linear for most organic compounds, from the minimum detectable limit through concentrations greater than 10% times the minimum detectable limit. Linear range depends on each specific compound; it is directly proportional to sensitivity of the FID toward the given compound.

In general, where sample components of interest are in high concentration, increased air flow may be necessary (up to 650 ml/min). Where components of interest are in low concentration, reduced air flow rates are acceptable (375 to 425 ml/min).

For maximum sensitivity, it is recommended that a standard sample be made containing components of interest in concentrations expected. By experimenting with different carrier, air, and H2 flow rates, the standard is used to determine flow rates giving maximum response.

Flame Ionization Detector (FID)

Description HP Part No. Qty

  • Collector Assembly: G1531-60690
  • Collector Nut 19231-20940
  • Spring Washer 3050-1246
  • Ignitor (Glow Plug) Assembly 19231-60680
  • Ignitor Cable Assembly G1531-60680
  • Upper/Lower Collector Insulator G1531-20700
  • Collector Body G1531-20690
  • Spanner Nut (Collector) 19231-20980
  • Collector Mount G1531-20550
  • Collector Housing G1531-20740
  • FID Interconnect Assembly G1531-60710
  • FID Signal Board G1531-60010
  • FID Interface Board G1531-60020
  • Screw (captive) M4 x 20 mm, Torx, T20 1390-1024
  • Mounting Pallet G1531-40020
  • Base Spanner Nut 19231-20990
  • Base Weldments
  • Packed Column FID G1531-80580
  • Capillary Column FID G1531-80630
  • Heater/Sensor Assembly G1531-61140
  • Nut W/Lock Washer 0535-0043
  • FID Block Insulation G1531-00030
  • FID Seal Insulation
  • Capillary G1531-00130
  • Packed G1531-00160
  • Packed FID Column Adapters
  • FID/NPD Capillary Column 19244-80610
  • FID/NPD 1/8 in. Packed Column 19231-80520
  • FID/NPD 1/4 in. Packed Column 19231-80530
  • Nutwarmer Insulation (Order qty 3) 19234-60715
  • Nutwarmer Cup Assembly 19234-60700

Flame Ionization Detector (FID) Manifold Assembly

Description HP Part No. Qty

  • EPC Control Valve (Order no. G1531-60610 ) G1531-60541
  • NON-EPC 2 Way Valve G1531-60530
  • O-Rings HP M8 (Order No. 5180-4181, 12/pkg) 0905-1039
  • EPC Control Module Assembly G1531-60520
  • Non-EPC Control Module Assembly G1531-60500
  • Make-up Gas, Manual Forward G1531-60570
  • Pressure Regulator, 0-100 psi G1531-60630
  • Fid Manifold Regulator Brazement G1531-80520
  • Supply Gas Jumper Weldment G1531-80550


GC Detector, Agilent (HP) 6890 FID