Designation：D465-82 ( Reapproved 1997)ε1 Standard Test Methods for Acid Number of Rosin.doc

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Designation：D465-82 ( Reapproved 1997)ε1 Standard Test Methods for Acid Number of Rosin.doc

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Designation：D465-82 ( Reapproved 1997)ε1 Standard Test Methods for Acid Number of Rosin

Designation：D465－82 ( Reapproved 1997)ε1 Standard Test Methods for Acid Number of Rosin This standard is issued under the fixed designation D 465: the number immediately followed the designation indicate the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (ε) indicates an editorial change since the last revision or reapproval. Note: Section 7 was changed editorially in November 1987. 1 These test methods are under the jurisdiction of ASTM Committee D-1 on Paint and Related Coating and Materials and are the direct responsibility of Subcommittee D01.34 on Naval Stores. Current edition approved March 26, 1982. Published June 1982. Originally published as D465-37T. Last previous edition D 465-59(1981). 1. Scope 1.1 These test methods are intended for determining the acid number of rosin. Two methods are covered, as follows: 1.1.1 Internal indicator method, and 1.1.2 Potentiometric method. 1.2 The internal indicator method is suitable for use only with light- and medium-colored rosin. The potentiometric method is suitable for use with both light- and dark-colored resin. 1.3 This standard may involve hazardous materials, operation, and equipment. This standard does not purport to address all of safety problems 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. 2. Referenced Document 2.1 ASTM Standard: E 70 Test Method for pH of Aqueous Solutions with the Glass Electrode2 2Annual Book of ASTM Standards, Vol 15.05 3. Preparation of Specimen 3.1 The specimen taken for analysis shall consist of small pieces of rosin chipped from a freshly exposed part of a lump or lumps, and thereafter crushed to facilitate weighing and solution. The specimen shall be so prepared the same day on which the test is begun, in or