What is ISO 20884- Determination of sulfur content of automotive fuels about?
ISO 20884 specifies a wavelength-dispersive X-ray fluorescence (WDXRF) test method for the determination of the sulfur content of liquid, homogeneous automotive fuels from 5 mg/kg to 500 mg/kg, which have a maximum oxygen content of 3,7 % (m/m). This product range covers:
- Diesel fuels containing up to about 30 % (V/V) fatty acid methyl esters (FAME)
- Motor gasoline containing up to about 10 % (V/V) ethanol
- Synthetic fuels such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL) having sulfur contents in the range of 5 mg/kg to 45 mg/kg
Products with higher oxygen content show significant matrix effects, e.g., pure FAME used as biodiesel, nevertheless, pure FAME can be analysed when the corresponding procedures are followed.
Who is ISO 20884 - Determination of sulfur content of automotive fuels for?
ISO 20884 on the determination of sulfur content of automotive fuels is beneficial for:
- Petroleum industries, automotive and aerospace industries, oil and gas industries, metal fabricating industries
- Civil engineers and environmental engineers
- Pharmaceutical and food beverage industries
- Astronomers
Why should you use ISO 20884- Determination of sulfur content of automotive fuels?
Sulfur is invariably present in petroleum products, feedstock, and crude oil. Several analytical methodologies are available to determine the sulfur content from trace level to percentage level.
The sample under analysis is exposed in a sample cell to the primary radiation of an X-ray tube. The count rates of the S K-L2,3 X-ray fluorescence and, where required, the count rate of the background radiation is measured. The sulfur content of the sample is determined from a calibration curve defined for the relevant measuring range. The spectrometer is optimized in accordance with the manufacturer's specifications in order to achieve the optimum signal-to-noise ratio. The calibration solution with 50 mg/kg sulfur is recommended for optimization.
Overall, ISO 20884 is helpful as it determines the sulfur content of automotive fuels that can help you out in your business. Performance checks are carried out on a regular basis since such checks give valuable information about the status and stability of the spectrometer. For the range from 5 mg/kg to 60 mg/kg sulfur, and for the range 60 mg/kg to 500 mg/kg sulfur, separate calibrations are conducted.
What’s changed since the last update?
BS EN ISO 20884:2019+A1:2021 supersedes BS EN ISO 20884:2019, which is withdrawn. BS EN ISO 20884:2019+A1:2021 cancels and replaces the second edition (ISO 20884:2011), which has been technically revised. The main changes compared to the previous edition are as follows:
- An extension of the scope to include hydrotreated vegetable oil (HVO) and the synthetic fuel “gas to liquid” (GTL)
- Inclusion of specific procedural steps for instruments utilizing monochromatic excitation.