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Instruments > In Situ/Laboratory Instruments > Chemical Meters/Analyzers > GC-TCD

Preferred term

GC-TCD  

Definition

  • Gas Chromatography -Thermal Conductivity Detector or GC-TCD is a technique used to analyze inorganic gases (Argon, Nitrogen, Hydrogen, Carbon Dioxide, etc.) and small hydrocarbon molecules. The TCD compares the thermal conductivity of two gas flows - the pure carrier (reference) gas and the sample. Changes in the temperature of the electrically-heated wires in the detector are affected by the thermal conductivity of the gas which flows around this. The changes in this thermal conductivity are sensed as a change in electrical resistance and are measured. (en)

Broader concept

Change note

  • 2017-06-27 15:40:19.0 [tstevens] Insert Concept add broader relation (GC-TCD [f54fd6d0-9705-4f45-8c78-7eaba058b1b6,309709] - Chemical Meters/Analyzers [3d25724b-832f-4a61-b0b2-4f2ccecdba94,289589]);
  • 2017-06-28 07:26:04.0 [tstevens] insert AltLabel (id: null category: primary text: Gas Chromatography - Thermal Conductivity Detector language code: en); insert Definition (id: null text: Gas Chromatography -Thermal Conductivity Detector or GC-TCD is a technique used to analyze inorganic gases (Argon, Nitrogen, Hydrogen, Carbon Dioxide, etc.) and small hydrocarbon molecules. The TCD compares the thermal conductivity of two gas flows - the pure carrier (reference) gas and the sample. Changes in the temperature of the electrically-heated wires in the detector are affected by the thermal conductivity of the gas which flows around this. The changes in this thermal conductivity are sensed as a change in electrical resistance and are measured. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/f54fd6d0-9705-4f45-8c78-7eaba058b1b6

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