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  • ASTM D874 Sulfated Ash From Lubricating Oils And Additives

    ASTM D874 Sulfated Ash From Lubricating Oils And Additives

    The sample is ignited and burned until only ash and carbon remain. After cooling, the residue is treated with sulfuric acid and heated at 775°C until oxidation of carbon is complete. The ash is then cooled, re-treated with sulfuric acid, and heated at 775°C to constant weight.

    ASTM D874 Sulfated Ash content ash content
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