Brief
That’s a meaÂsure of the presÂence of dirt, minÂerÂals, resins, oxiÂdized fatty acids, alkaÂline soaps of palmitic and stearic acids, and proÂteins that are susÂpended in the oil.n nnnIt is deterÂmined by disÂsolvÂing some oil in petroÂleum ether and filÂterÂing out the impuÂriÂties and is expressed as a perÂcentÂage (%) of the total.
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