- Published: August 2024
Overview:
This standard describes a method for determining the concentration of dispersed particles in diesel fuel, diesel fuel containing hydrogenated vegetable oil (HVO) and diesel fuel containing fatty acid methyl esters (FAME) and FAME (Procedure B only). Results are reported for particles ≥4 μm(c), ≥6 μm(c)and≥14 μm(c), per/ml and also in terms of ISO 4406 codes. The method covers three procedures; A which tests the sample without treatment to dissolve soft particles; B and C which dissolve soft particles using co-solvent prior to measurement. The precision statement was derived using two manufacturers’ apparatus (known as Type 1 and Type 2). Details are provided in Normative Annex A and B.
NOTE 1 When using a co-solvent the particle counts represent the amount of hard particles as defined by this method. NOTE 2 For the purposes of this method, water droplets are considered as particles and agglomerated particles are detected as a single obscuration event. Although the projected area of a particle is measured, this is expressed as a diameter for the purposes of this method.
NOTE 3 During use of a co-solvent to dissolve soft particles and if hard particles are agglomerated with soft particles, an increase in particles and consequently an increase in particle count can also occur. Where such effects cancel out, or no soft particles are present, counts can remain unchanged.