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These methods of chemical analysis are intended for the
determination of barium, tin, silica, zinc, aluminum, calcium,
magnesium, sodium and potassium in
new and used lubricating
oils. Other metallic elements, sulfur, phosphorus and chlorine in
amounts commonly found
in lubricating oils do not
interfere in this method.
Essentially, the method
consists of igniting
the sample, dissolving the residue
in mineral acid and then
separating the various metals by
conventional methods.
