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ASTM D4937-96(2021)

Historical Reaffirmation

Standard Test Method for <emph type="ital">p</emph>-Phenylenediamine Antidegradants Purity by Gas Chromatography

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1.1 This test method covers the determination of the purity of Class I, II, and III p-phenylenediamine (PPD) antidegradants as described in Classification D4676 by gas chromatography (GC) detection and area normalization for data reduction.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 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.


5.1 This test method is designed to assess the relative purity of production PPDs. These additives are primarily used as antiozonants for tires and other rubber or polymeric products.

5.2 Since the results of this test method are based on area normalization, it assumes that all components are eluted from the column and each component has the same detector response. Although this is not strictly true, the errors introduced are relatively small and much the same for all samples; thus, they can be ignored since the intent of the test method is to establish relative purity.

5.3 Although trace amounts of “low boilers” are present in production samples, they are disguised by the solvent peak when using packed columns (Procedure A).

SDO ASTM: ASTM International
Document Number D4937
Publication Date Nov. 1, 2021
Language en - English
Page Count 7
Revision Level 96(2021)
Supercedes
Committee D11.11
Publish Date Document Id Type View
June 10, 1996 D4937-96E01 Revision
Nov. 1, 2021 D4937-96R21 Reaffirmation
May 1, 2017 D4937-96R17 Reaffirmation
May 1, 2012 D4937-96R12 Reaffirmation
March 1, 2006 D4937-96R06E01 Reaffirmation
June 10, 1996 D4937-96R01 Reaffirmation