IP 143 - Asphaltenes
We perform testing by IP 143 to determine the asphaltene content of gas oil, diesel fuel, residual fuel oils, lubricating oil, bitumen, and crude petroleum. High asphaltene content can cause problems during storage and handling. Because asphaltenes are the last molecules to combust completely in petroleum products, they can be an indicator of black smoke propensity.
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IP 143 corresponds to ASTM D6560.