Test Method for Heptane Insolubles

This standard is issued under the fixed designation D 3279 the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last teapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. 

1 This test method covers determination of the weight 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 650°F (343 C) or higher. 

2 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See Section 7 for a specific hazard statement. 

C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials  

1 The sample is dispersed in n-heptane and filtered through a glass-fiber pad. The insoluble material is washed, dried, and weighed. 

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