scope:

NEN-EN-ISO 10370 specifies a method for the determination of the amount of carbon residue, in the range 0,10 % (m/m) to 30,0 % (m/m), left after evaporation and pyrolysis of petroleum products under specified conditions. For products which yield a residue in excess of 0,10 % (m/m), the test results are equivalent to those obtained by the Conradson carbon residue test (see ISO 6615). This International Standard is also applicable to petroleum products which consist essentially of distillate material, and which may yield a carbon residue below 0,10 % (m/m). On such materials, a 10 % (V/V) distillation residue is prepared by the procedure described in Sections 7.1.1 & 7.1.2 of this standard before analysis. Both ash-forming constituents, as defined by ISO 6245, and non-volatile additives present in the sample add to the carbon residue value and are included in the total value reported.