PETROLEUM PRODUCTS - LUBRICATING OILS AND ADDITIVES - DETERMINATION OF SULFATED ASH (ISO 3987:1994, IDT)
This Malaysian Standard describes a procedure for the determination of the mass percentage of sulfated ash from unused lubricating oils containing additives and from additive concentrates used in compounding. These additives usually contain one or more of the following metals: barium, calcium, magnesium, zinc, potassium, sodium and tin. The elements sulfur, phosphorus and chlorine tan also be present in combined form.
Application of this procedure to sulfated ash levels below 0.02 % (m/m) is restricted to oils containing ashless additives. The lower limit of applicability of the procedure is 0.005 % (m/m) sulfated ash.
This Malaysian Standard is not intended for the analysis of used engine oils containing lead, nor is it
recommended for the analysis of non-additive lubricating oils, for which ISO 6245:1993, Petroleum products - Determination of ash, is suitable.
NOTE 1 There is evidence that magnesium does not react in the same manner as alkali metals in this procedure. If magne
