IS 1448 : Part 34 : 1979 Methods of Test for Petroleum and its Products - Part 34 : Determination of Sulphur in Petroleum Products (Lamp Method)

1 Scope

1.1 These methods (Methods A and B) cover the determination oftotal sulphur in liquid petroleum products in concentrations above0.002 percent by mass. A special sulphate analysis procedure isdescribed under Method C that permits the determination of sulphurin concentrations as low as 5 ppm. Method D describes thedetermination of sulphur in liquefied petroleum gases (LPG) andother light hydrocarbon mixtures boiling in the same range.

1.2 The direct burning procedure is applicable to the analysisof such materials as gasoline, kerosine, naphtha, industrialaromatic hydrocarbons and other liquids that can be burnedcompletely in a wick lamp, The blending procedure is applicable tothe analysis of some materials that cannot be burned satisfactorilyby the direct procedure, such as gas oils, distillate fuel oils,naphthenic acids and alkyl phenols. Residual fuel oils, bitumens,tars and other heavy residues cannot be analysed by this method.

1.3 Phosphorus compounds normally present in commercial gasolinedo not interfere. A correction is given for the small amount ofacid resulting from the combustion of the lead anti-knock fluids ingasolines. Appreciable concentrations of acid-forming orbase-forming elements from other sources interfere when thetitration procedure is employed since no correction is provided inthese cases.

2 References

IS 265 : 1976 Specification for hydrochloric acid

IS 266 : 1977 Specification for sulphuric acid

IS 1447 : 1966 Methods of sampling of petroleum and its products