ASTM-D2896 2011

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D2896-11 Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration

Published By	Publication Date	Number of Pages
ASTM	2011	9

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Description

ASTM D2896-11

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

ASTM D2896

Scope

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

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use Apparatus Reagents and Materials Standardization of Reagents
3	Preparation of Sample Preparation of Electrode System
4	Procedure A (120 mL) Procedure B (60 mL)
5	Quality Control Checks Calculation Report Back Titration, Procedure A (120 mL)
6	Back Titration, Procedure B (60 mL) Report of Result for Back Titration Precision and Bias TABLE 1
7	Keywords X1. TEST COVERAGE X1.1 X1.2 X2. ALTERNATIVE SOLVENT X2.1 X2.2 Reagents X2.3 Procedure X2.4 Report
8	X2.5 Precision and Bias X3. ALTERNATIVE ELECTROLYTES X3.1 X3.2 Reagents X3.3 Procedure X3.4 Report X3.5 Precision and Bias
9	X4. CHECK FOR ELECTRODE PERFORMANCE X4.1 X4.2 X4.3 X4.4 X4.5

Additional information

Standard Title	D2896-11 Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration
Published Code	ASTM
Publication Date	2011
Pages Count	9