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Description of ASTM-D2896 2011ASTM D2896-11Historical Standard: Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid TitrationASTM D2896Scope 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 X2 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 17, 18, and 20 and Appendix X1. 1.5 This test method can be used to determine base number >300 mg KOH/g. However, the precision statement in Section 20 has been obtained only on base number ≤300 mg KOH/g. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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 warning statements, see Section 7, Section 10, and
X2.2. Keywords base number; perchloric acid; petroleum products; potentiometric titration: Acidity, alkalinity, pH--petroleum products ICS Code ICS Number Code 75.080 (Petroleum products in general) DOI: 10.1520/D2896-11 The following editions for this book are also available...
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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