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Analytical Laboratories, Research and Science

Thermal Conductivity Detector (TCD)

Thermal conductivity detector (TCD) is a technique used to analyse inorganic gases and small hydrocarbon molecules.

Air Products' Gases Used in TCD Analysis        

ap0022-helium
Helium BIP® Technology

Unrivalled gas purity specification, less than 10 ppb oxygen, and less than 20 ppb moisture

ap0024-hydrogen2
Hydrogen BIP® Technology

Unrivalled gas purity specification, less than 100 ppb oxygen, and less than 20 ppb moisture

ap0026-nitrogen2
Nitrogen BIP® Technology 

Unrivalled gas purity specification, 10 ppb oxygen, 20 ppb moisture

ap0014-argon
Argon BIP® Technology

Unrivalled gas purity specification, 10 ppb oxygen, 20 ppb moisture

ap0058-shopping-cart
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Ask the Expert

Waeel Shasheen

Specialty Gases Business Development Manager

What are the critical impurities in the Carrier Gas for Thermal Conductivity Detection (TCD)?

Oxygen and Water are critical impurtiies because they can permanently damage the wires in the detector by oxidation, which causes reduced sensitivity and negative peaks.