scope:

This Standard specifies an ultraviolet fluorescence test method for the determination of the sulfur content of motor gasoline, kerosene and light oil having sulfur contents in the range of 0.0001 % TO 0.0500% mass fraction. The method is applicable to motor gasolines, including those containing up to 3.7% mass fraction oxygen (e.g. those blended with ethanol up to about 10% volume fraction), and to light oils, including those containing up to 10% mass fraction fatty acid methyl ester (FAME).

Other petroleum products and samples with the sulfur content exceeding 0.0500 % mass fraction and samples with the content of oxygen-containing compounds exceeding the specified range can be analysed according to this test method, however, no precision data for these analyses have been established for this Standard.

NOTE 1 Halogens interfere with precise determination of sulfur content at concentrations above approximately 0.350 0 % mass fraction.

NOTE 2 The sulfate species in ethanol have a conversion factor close to that of organic sulfur to sulfur dioxide.

NOTE 3 For example, 2-ethyl hexyl nitrate (EHN) added as cetane improver to light oil shows an enhancing effect on sulfur content up to 0.000 17 % mass fraction, when 0.2000 % mass fraction EHN is added to light oil containing 0.001 0 % mass fraction sulfur.

NOTE 4 The test methods specified in respective parts of JIS K 2541 series are shown in Annex JA.

NOTE 5 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 20846: 2011 Petroleum products-Determination of sulfur content of automotive fuels-Ultraviolet fiuorescence method(MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard andJIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

WARNING The use of this Standard may involve hazardous materials, operations and equipment. This Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and determine the applicability of the regulatory limitations prior to use.