This article is a troubleshooting guide for when the Flame Ionization Detector (FID) does not ignite or the flame keeps going out. Cause: If the FID is having ignition issues, it is due to the following causes: FID temperature: is too low. Lit Offset: is incorrect.

• The FID is a DESTRUCTIVE, mass sensing detector • Cations generated in the flame are counted and produce the detector signal • Analytes that have the greatest number of low oxidation state carbons produce the LARGEST signal • The FID will respond to ORGANIC compounds (C-H Bonds) • There is little or NO response for the following:

A flame ionization detector (FID) is a scientific instrument that measures analytes in a gas stream. It is frequently used as a detector in gas chromatography. The measurement of ions per unit time makes this a mass sensitive instrument. [1]

Nov 10, 2022 · FID noise can result from many contributing factors, including: Contamination in the gas supplies to the GC (gas contamination usually yields a high background of >20 pA). Poor flame stability due to a partially plugged or contaminated FID jet assembly.

Dec 20, 2022 · If the FID interconnect spring is bent, damaged or has bad contact with FID base, it can cause a short circuit in the FID signal circuitry. The consequence is an extremely high baseline signal output.

Jan 13, 2022 · Perform FID maintenance and replace the FID jet. If it ignites manually and the flame stays on with the normal FID gas flows, replace the igniter and re-test. If this fails, replace the module.

The 6890/6850 FID uses a hydrogen flame to burn organic samples, resulting in increased ionization that is measured as a current—values up to the 10^6 pa range. The GC will auto-ignite if the following conditions are true: The FID jet is not plugged or partially plugged. The FID jet is sealing properly to the to the base weldment.

Jun 18, 2024 · This document describes how to troubleshoot a Trace 1300 / 1600 Series FID module.

The FID is a relatively simple detector in that if the electronics are functioning, a sudden change in performance is often either a matter of checking flows and cleaning or replacing the jet.

Jan 13, 2022 · Check for column bleeding issues by disconnecting the column and capping the FID. Check the collector signal cable of the FID. Check the gases purity and seek main line issues due to the use of gas generators and on-line purifying filters.