What advantages does using a flame ionization detector have over a thermal conductivity detector?

The advantages of an FID include its simplicity, reliability, versatility, and ease of operation. Another advantage of using an FID is that this detector gives little or no signal for common carrier gases (eg, He, Ar, or N2) or typical contaminants in such gases (eg, O2 and H2O).

Which type of GC detector is most used?

FID
The FID is the most common detector used in gas chromatography. The FID is sensitive to, and capable of detecting, compounds that contain carbon atoms (C), which accounts for almost all organic compounds.

What is the advantage of using a thermal conductivity type detector?

The principle of detection is that analytes will generally have lower thermal conductivity than the carrier gas. It is rugged, but is not very selective compared to other detectors [12]. An advantage of the TCD is that it is non-destructive, making it useful for preparative separations.

What is a thermal conductivity detector used for?

Thermal Conductivity Detector (TCD) is a detector used in gas chromatography (GC) to analyse inorganic gases (such as argon, nitrogen, hydrogen, carbon dioxide) and small hydrocarbon molecules. The TCD compares the thermal conductivity of two gas flows, the pure carrier (reference) gas and the sample.

Which is the most reliable flame ionization detector?

The Flame Ionization Detector (FID) is the most widely and successfully used gas chromatographic (GC) detector for analyzing volatile hydrocarbons and many carbon containing compounds. It is highly reliable, provides great sensitivity, and has a wide linear range of detection.

What are the different types of flame detectors?

• Flame Ionization Detector (FID) – C atom counter • Thermal Conductivity Detector (TCD) • Electron-Capture Detector (ECD) •MS • Up to 60 other types of detectors used Flame Ionization Detector

What makes a thermal conductivity detector go up?

If nitrogen is used, the thermal conductivity usually goes up because most things are more conductive than nitrogen. Because the TCD does not destroy the sample during the detection process, this detector can be hooked up in series to a flame ionization detector or other detector. 551 General Information The Thermal Conductivity Detector Figure 76.

Why is the FID a poor ionization detector?

In the absence of organic molecules in the carrier gas, this flame is very poor in charged particles, because the combustion of hydrogen with oxygen delivers only a very small number of ions or electrons. The FID is constructed of a small volume chamber into which the gas chromatograph’s capillary column is directly plumbed.