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ISO 3987:2010
Petroleum products - Determination of sulfated ash in lubricating oils and additives
ISO 3987:2010 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 can also be present in combined form.
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International Organization for Standardization [iso]
International Organization for Standardization [iso]