WARNING — The use of this International Standard may involve hazardous materials, operations and
equipment. This International Standard does not purport to address all of the safety problems
associated with its use. It is the responsibility of the user of this International Standard to establish
appropriate safety and health practices and determine the applicability of regulatory limitations prior
to use.
This International Standard 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 10 % (V/V) fatty acid methyl esters (FAME) and motor gasolines containing up to about 10 % (V/V)
ethanol.
NOTE 1 Sulfur contents higher than 500 mg/kg can be determined after sample dilution. However, the precision was
not established for diluted samples.
Products with higher oxygen content show significant matrix effects, e.g. FAME used as biodiesel.
Nevertheless, FAME may be analysed when the corresponding procedures are followed (see 4.3 and 7.1).
Other products may be analysed with this test method. However, precision data for products other than those
mentioned have not been established for this International Standard.
NOTE 2 For the purposes of this International Standard, the terms “% (m/m)” and “% (V/V)” are used to represent the
mass fraction and the volume fraction of a material respectively.