ČSN EN 16997   (656171) Kapalné ropné výrobky - Stanovení obsahu síry v motorovém palivu E85 - Metoda vlnově disperzní rentgenové fluorescenční spektrometrie

Anotace textu normy ČSN EN 16997   (656171)

This European Standard specifies a wavelength-dispersive X-ray fluorescence (WDXRF) test method for the determination of the sulfur content in ethanol (E85) automotive fuel [3], containing ethanol between 50 % (V/V) and 85 % (V/V), from 5 mg/kg to 20 mg/kg, using instruments with either monochromatic or polychromatic excitation.

NOTE 1 - Sulfur contents higher than 20 mg/kg can be determined after sample dilution with an appropriate solvent. However, the precision was not established for diluted samples.

NOTE 2 - For the purposes of this European Standard, the terms ´% (m/m)´ and ´% (V/V)´ are used to represent the mass fraction and the volume fraction of a material respectively.