EffecTech has been awarded ISO 17025 accreditation from UKAS for the calibration of LNG analysers.
The calibration method uses reference liquid mixtures which are prepared cryogenically in a bespoke cryostat. This accredited method provides, for the first time, chemical traceability for instruments measuring LNG composition directly (without the need for a vapourisation stage).
Direct measurement LNG analysers do not need to vapourise the LNG prior to analysis and this is seen by many as a distinct advantage as it removes the issues caused by the vapourisation step. If the LNG sample is not fully vapourised instantaneously, there is a risk of fractionation and enrichment which can compromise the representativeness of the sample. Direct measurement therefore, in principle, can have lower uncertainties than the vapouriser/gas chromatograph (GC) combination method currently used.
... to continue reading you must be subscribed
