ASTM D2007 for characteristic groups in processing oils & petroleum-derived oils
ASTM D2007 standard test method for characteristic groups in rubber extender and processing Oils and other petroleum-derived oils by the clay-gel absorption chromatographic method
1. Scope
1.1 This test method covers a procedure for classifying oil samples of initial boiling point of at least 260°C (500°F) into the hydrocarbon types of polar compounds, aromatics and saturates, and recovery of representative fractions of these types. This classification is used for specification purposes in rubber extender and processing oils.
NOTE 1 - See Test Method D2226.
1.2 This test method is not directly applicable to oils of greater than 0.1 mass % pentane insolubles. Such oils can be analyzed after removal of these materials, but precision is degraded (See Appendix X1).
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, 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. Specific precaution statements are given in 6.1, Section 7, A1.4.1, and A1.5.5.
2. Referenced Documents
2.1 ASTM Standards:
D86 Test Method for Distillation of Petroleum Products at Atmospheric Pressure
D323 Test Method for Vapor Pressure of Petroleum Products (Reid Method)
D1159 Test Method for Bromine Number of Petroleum Distillates and Commercial Aliphatic Olefins by Electrometric Titration
D2226 Classification for Various Types of Petroleum Oils for Rubber Compounding Use
D5309 Specification for Cyclohexane 999
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 The following terms refer to the hydrocarbon types and structural groups as measured by this test method:
3.1.1.1 asphaltenes, or n-pentane insolubles - insoluble matter that precipitates from a solution of oil in n-pentane under the specified conditions.
3.1.1.2 polar compounds - material retained on adsorbent clay after percolation of the sample in n-pentane eluent under the conditions specified.
3.1.1.3 polar aromatics - synonym for polar compounds.
3.1.1.4 aromatics - material that, on percolation, passes through a column of adsorbent clay in a n-pentane eluent but adsorbs on silica gel under the conditions specified.
3.1.1.5 saturates - material that, on percolation in a n-pentane eluent, is not adsorbed on either the clay or silica gel under the conditions specified.
