IS 1448 : Part 101 : 1980 Methods of test for petroleum and its products: Part 101 Colorimetric determination of phosphorus in lubricating oils

1 Scope

1.1 This method is used for the determination of lowconcentrations of phosphorus in lubricating oils. Metallicelements, such as iron, lead, magnesium and barium in amountscommonly encountered in lubricating oils do not interfere. Thismethod may also be used for the analysis of additive concentratescontaining phosphorus in the pentavalent state but is notrecommended if the material contains more than 10 percentphosphorus.