ISO 3012:1999 PDF

Scope: This International Standard specifies a method for the determination of thiol (mercaptan) sulfur in light distillates, such as gasolines and naphtha fractions, and middle distillate fuels, such as kerosines and gas oils, in the range of 0,000 3 % (m/m) to 0,010 0 % (m/m) (3 mg/kg to 100 mg/kg). Organic sulfur compounds such as sulfides, disulfides and thiophene do not interfere. Elemental sulfur does not interfere at contents less than 0,000 5 % (m/m). Hydrogen sulfide interferes, if not removed as described in 8.2. NOTE For the purposes of this International Standard, the term "% (m/m)" is used to represent the mass fraction of a material.

ISO 3012:1999 history

1999 ISO 3012:1999 Petroleum products - Determination of thiol (mercaptan) sulfur in light and middle distillate fuels - Potentiometric method
1991 ISO 3012:1991 Gasoline, kerosine and distillate fuels; determination of mercaptan sulfur; potentiometric method
1974 ISO 3012:1974 Aviation turbine fuels — Determination of mercaptan sulphur — Amperometric and potentiometric methods