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Application Note 043

Quantitative monitoring of monoethylene glycol (MEG) by TD–GC

Application Note 043

Monoethylene glycol (MEG) is added as a plasticiser to natural gas pipelines in many areas to prevent the bindings in old pipes from drying out, shrinking and causing leaks. MEG is sprayed into the gas lines as a fine aerosol, which vapourises in the gas flow. Vapour-phase concentrations must be carefully monitored at various distances from the supply point to make sure that sufficient concentration is maintained without using excessive quantities.

In this application note, we demonstrate that thermal desorption–gas chromatography can be used to analyse a MEG standard with excellent linearity, making it a suitable method for detecting vapour of this additive in natural gas.

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