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ASTM D 4739 : 1996

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Method for Base Number Determination by Potentiometric Titration
Superseded date

11-11-2014

Published date

31-12-2010

1.1 This test method covers a procedure for the determination of basic constituents in petroleum products and lubricants (Note 1). The test method resolves these constituents into groups having weak-base and strong-base ionization properties, provided the dissociation constants of the more strongly basic compounds are at least 1000 times that of the next weaker groups.

1.1.1 This test method covers base numbers up to 70. While it can be extended to higher base numbers, the precision of the test method for base numbers greater than 70 has not been determined.

Note 1-In new and used oils, the constituents which can be considered to have basic properties are primarily organic and inorganic bases, including amino compounds, although certain salts of heavy metals, salts of weak acids, basic salts of polyacidic compounds, and some additives such as inhibitors or detergents may show basic characteristics.

1.2 This test method can be used to indicate relative changes that occur in an oil during use under oxidizing or other service conditions regardless of the color or other properties of the resulting oil (Note 2). Although the analysis is made under closely specified conditions, the method is not intended to, and does not, result in reported basic properties which can be used under all service conditions to predict performance of an oil; for example, no overall relationship is known between bearing corrosion or the control of corrosive wear in the engine and base number.

Note 2-A color indicator titration method is also available in the Test Method D 974 and IP139. The base numbers obtained by the potentiometric method may or may not be numerically the same as those obtained by Test Method D 974 or equivalent color indicator methods such as given in Federal Test Method Std. No. 791b. Potentiometric methods for base number are also available in Test Method D 2896.

Note 3-Test Method D 4739 was developed as an alternative for the former base number portion of Test Method D 664. Base numbers obtained by this method may or may not be numerically the same as those obtained by the former base number portion of Test Method D 664.

1.3 The values stated in acceptable metric units are to be regarded as the standard.

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.

Committee
D 02
DocumentType
Test Method
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy

ASTM D 6224 : 2016 Standard Practice for In-Service Monitoring of Lubricating Oil for Auxiliary Power Plant Equipment
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ASTM D 6987/D6987M : 2013 : REV A Standard Test Method for Evaluation of Diesel Engine Oils in T-10 Exhaust Gas Recirculation Diesel Engine (Withdrawn 2022)
ASTM D 7422 : 2017 : REV A Standard Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine
ASTM D 974 : 2014 : EDT 2 Standard Test Method for Acid and Base Number by Color-Indicator Titration
ASTM D 8111 : 2019 Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIH, Spark-Ignition Engine
ASTM D 6923 : 2018 Standard Test Method for Evaluation of Engine Oils in a High Speed, Single-Cylinder Diesel Engine—Caterpillar 1R Test Procedure
ASTM D 6750 : 2019 Standard Test Methods for Evaluation of Engine Oils in a High-Speed, Single-Cylinder Diesel Engine—1K Procedure (0.4 % Fuel Sulfur) and 1N Procedure (0.04 % Fuel Sulfur)
ASTM D 8074 : 2018 Standard Test Method for Evaluation of Diesel Engine Oils in DD13 Diesel Engine
ASTM D 7414 : 2018 Standard Test Method for Condition Monitoring of Oxidation in In-Service Petroleum and Hydrocarbon Based Lubricants by Trend Analysis Using Fourier Transform Infrared (FT-IR) Spectrometry
ASTM D 7156 : 2017 Standard Test Method for Evaluation of Diesel Engine Oils in the T-11 Exhaust Gas Recirculation Diesel Engine
ASTM D 8126 : 2017 Standard Test Method for Efficient Basicity Determination by Potentiometric Hydrochloric Acid Titration
ASTM D 6074 : 2015 Standard Guide for Characterizing Hydrocarbon Lubricant Base Oils
ASTM D 7415 : 2018 Standard Test Method for Condition Monitoring of Sulfate By-Products in In-Service Petroleum and Hydrocarbon Based Lubricants by Trend Analysis Using Fourier Transform Infrared (FT-IR) Spectrometry
ASTM D 8350 : 2020 Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IVB Spark-Ignition Engine
ASTM D 7468 : 2020 Standard Test Method for Cummins ISM Test
ASTM D 8111 : 2020 : REV B Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIH, Spark-Ignition Engine
ASTM D 8279 : 2021 Standard Test Method for Determination of Timing-Chain Wear in a Turbocharged, Direct-Injection, Spark-Ignition, Four-Cylinder Engine
ASTM D 8048 : 2021 Standard Test Method for Evaluation of Diesel Engine Oils in T-13 Diesel Engine
ASTM D 7484 : 2021 Standard Test Method for Evaluation of Automotive Engine Oils for Valve-Train Wear Performance in Cummins ISB Medium-Duty Diesel Engine
ASTM D 8074 : 2019 Standard Test Method for Evaluation of Diesel Engine Oils in DD13 Diesel Engine
ASTM D 7417 : 2017 Standard Test Method for Analysis of In-Service Lubricants Using Particular Four-Part Integrated Tester (Atomic Emission Spectroscopy, Infrared Spectroscopy, Viscosity, and Laser Particle Counter)
ASTM D 7422 : 2019 Standard Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine
ASTM D 7156 : 2019 Standard Test Method for Evaluation of Diesel Engine Oils in the T-11 Exhaust Gas Recirculation Diesel Engine
ASTM D 7549 : 2019 Standard Test Method for Evaluation of Heavy-Duty Engine Oils under High Output Conditions—Caterpillar C13 Test Procedure

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