The Measurement Of The Amount Content Of Sulphur In Gas Oils Using Isotope Dilution And Thermal Ionisation
The protocol to the 1979 convention on long-range transboundary air pollution on further reduction of sulphur emissions, the council directive 98/70/FC and references mentioned in there are related to the ongoing reduction of the sulphur amount content in fossil fuels used. The combustion of fossil fuels is the primary source for the emission of sulphur into the atmosphere. The released sulphur-oxides are converted in the atmosphere to sulphuric acid and other sulphate products. Sulphur particles play an important role in the chemistry and physics of the earth's atmosphere. These fine particles influence the radiation budget of the earth resulting in visibility degradation in the atmosphere. Sulphur dioxide has also a direct effect on human health and on the environment. The most reliable technique to determine the sulphur amount content in gas oils is isotope dilution followed by thermal ionisation mass spectrometry. The aim of this study was to develop a new measurement procedure that could be used for the certification of the sulphur amount content in gas oil reference materials. One of the key requirements of the measurement procedure was that the measurement results must be traceable to the SI system and have a sufficiently small uncertainty. The new method uses for the digestion of gas oil a High Pressure Asher. This combined with a calibrated enriched isotopic reference material, and high precision mass spectrometry makes it a powerful tool for an accurate and precise determination of the sulphur amount content in fossil fuels.
Bibliographic Reference: An oral report given at: Environment, Health, Safety "A Challenge for Measurements". Organised by: INERIS, DG-Research and BNM/LNE. Held in: Paris (FR), 14-15 June 2001
Record Number: 200013619 / Last updated on: 2001-07-30
Original language: en
Available languages: en