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ASTM D2896-01

Historical Revision

Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration

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1.1 This test method covers the determination of basic constituents in petroleum products by titration with perchloric acid in glacial acetic acid.

1.2 Procedures A and B use different titration solvent volumes and sample weights.

Note 1—A round robin on a series of new and used oils and additive concentrates has shown that the two procedures give statistically equivalent results.

1.3 Appendix A2 provides the use of an alternative solvent system which eliminates the use of chlorobenzene in this test method. The use of the alternative solvent gives statistically equivalent results; however, the precision is worse. Paragraph X2.5.5 provides guidance when comparing results using the two different solvents.

1.4 The constituents that may be considered to have basic characteristics include organic and inorganic bases, amino compounds, salts of weak acids (soaps), basic salts of polyacidic bases, and salts of heavy metals.

Note 2—This test method is applicable to both fresh oils and used oils as described in Sections 16, 17, and 19 and in the Appendix X1.

1.5 This test method can be used to determine base number >300 mg KOH/g. However, the precision statement in Section 19 has been obtained only on base number ≤300 mg KOH/g.

1.6 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. For specific hazard statements, see Section 7, Section 10, and X2.2.


SDO ASTM: ASTM International
Document Number D2896
Publication Date Nov. 10, 2001
Language en - English
Page Count 8
Revision Level 01
Supercedes
Committee D02.06
Publish Date Document Id Type View
Nov. 1, 2021 D2896-21 Revision
Dec. 1, 2015 D2896-15 Revision
May 15, 2011 D2896-11 Revision
July 15, 2007 D2896-07A Revision
Jan. 15, 2007 D2896-07 Revision
Jan. 1, 2006 D2896-06 Revision
May 1, 2005 D2896-05 Revision
Nov. 1, 2003 D2896-03 Revision
Nov. 10, 2001 D2896-98 Revision
Nov. 10, 2001 D2896-01E01 Revision
Nov. 10, 2001 D2896-01 Revision