ASTM D3279-19
- Standard Test Method for <emph type="ital">n</emph>-Heptane Insolubles
- standard by ASTM International, 06/15/2019
- Category: ASTM
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1.1 This test method covers determination of the mass percent of asphaltenes as defined by insolubility in normal-heptane solvent. It is applicable to all solid and semi-solid petroleum asphalts containing little or no mineral matter, to gas oils, to heavy fuel oils, and to crude petroleum that has been topped to a cut-point of 343 °C or higher.
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