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How much minimum ppm value can be measured by a TCD type GC?

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Question ajoutée par Daya Shankar Tiwari , Specialist , ADNOC group
Date de publication: 2017/01/25
John Benjamin Suresh
par John Benjamin Suresh , General Manager / Maintenance Contracts Manager , Analytical Instrumentation & Maintenance Systems (AIMS)

Generally TCD is used to measure Percentage levels, however the MDL can vary between manufactures. The PPM measurement through TCD is acceptable since TCD is a very Linear Detector and the key performer in TCD PPM detection is the Sample Load. The minimum a good TCD Can measure, which i have witnessed is 10~15 ppm.

kulandairaj cuthelbert
par kulandairaj cuthelbert , Lab Chemist

TCD is used to measure the Percentage level, However the minimum level of accuracy depends to its noise ratio

Mohamed Sharif Gazal Abdul Kareem
par Mohamed Sharif Gazal Abdul Kareem , Head Of Operations , Brothers Gas

TCD is can be used to measure upto 1-10 ppm for gases such as Argon or Oxygen, CH4, Carbon monoxide, Hydrogen, Nitrogen etc.

FID is used for measuring Hydrocarbons and usually can have range from 1-10 ppm as well. 

Mohammed Asif
par Mohammed Asif , Analyzer Supervisor , SBH pvt Ltd

TCD are used to measure Higher concentrations of hydro carbons in %. FPD and FID are used in PPM level depends upon the process.

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