ASTM D94

Standard Test Methods for Saponification Number of Petroleum Products

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Organization: ASTM
Publication Date: 1 May 2007
Status: active
Page Count: 9
ICS Code (Petroleum products in general): 75.080
scope:

These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the conditions of the test.

NOTE 1-Statements defining this test and its significance when applied to electrical insulating oils of mineral origin will be found in Guide D117. Experience has shown that for transformer oils, Test Method D94, modified by use of 0.1 M KOH solution and 0.1 M HCl, is more suitable.

Two test methods are described: Method A-Color Indicator Titration (Sections 6 - 13), and Method B-Potentiometric Titration (Sections 14 - 23).

Because compounds of sulfur, phosphorus, the halogens, and certain other elements that are sometimes added to petroleum products also consume alkali and acids, the results obtained indicate the effect of these extraneous materials in addition to the saponifiable material present. Results on products containing such materials, on used internalcombustion- engine crankcase oils, and on used turbine oils must be interpreted with caution.

NOTE 2-The materials referred to above, which are not normally considered saponifiable matter, include inorganic or certain organic acids, most nonalkali soaps, and so forth. The presence of such materials increases the saponification number above that of fatty saponifiable materials for which the test method is primarily intended. The odor of hydrogen sulfide near the end of the back-titration in the saponification test is an indication that certain types of reactive sulfur compounds are present in the sample. In the case of other reactive sulfur, chlorine, and phosphorus compounds and other interfering materials, no simple indication is given during the test. A gravimetric determination of the actual amount of fatty acids is probably the most reliable method for such compounds. Test Methods D128 or IP Method 284/86 can be used to determine fatty acids gravimetrically.

The values stated in SI units are to be regarded as the standard.

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 Sections 6, 7, 8, 10, 15, 16, 17, and 19.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

ASTM D94
May 1, 2007
Standard Test Methods for Saponification Number of Petroleum Products
These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the conditions of the...
May 1, 2007
Standard Test Methods for Saponification Number of Petroleum Products
These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the conditions of the...
May 1, 2007
Standard Test Methods for Saponification Number of Petroleum Products
These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the conditions of the...
May 1, 2007
Standard Test Methods for Saponification Number of Petroleum Products
These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the conditions of the...
June 10, 2002
Standard Test Methods for Saponification Number of Petroleum Products
These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the conditions of the...
November 10, 2000
Standard Test Methods for Saponification Number of Petroleum Products
1. Scope 1.1 These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the...
February 10, 1999
Standard Test Methods for Saponification Number of Petroleum Products
1. Scope 1.1 These test methods cover the determination of the amount of constituents in petroleum products such as lubricants, additives, and transmission fluids that will saponify under the...
April 15, 1993
Standard Test Methods for Saponification Number of Petroleum Products
A description is not available for this item.
October 27, 1989
STANDARD TEST METHOD SAPONIFICATION NUMBER OF PETROLEUM PRODUCTS (IP 136/86)
A description is not available for this item.
October 25, 1985
STANDARD TEST METHOD FOR SAPONIFICATION NUMBER OF PETROLEUM PRODUCTS (IP-136/71(79)) (E1-1986)
A description is not available for this item.

References

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