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现行 ASTM D4937-96(2021)
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Standard Test Method for <emph type="ital">p</emph>-Phenylenediamine Antidegradants Purity by Gas Chromatography 气相色谱法测定苯二胺抗降解剂纯度的标准试验方法
发布日期: 2021-11-01
1.1 本试验方法涵盖了I、II和III级纯度的测定 p -分类中所述的苯二胺(PPD)抗降解剂 D4676号 通过气相色谱(GC)检测和面积归一化进行数据缩减。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题(如有)。本标准的用户有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒(TBT)委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法旨在评估生产PPD的相对纯度。这些添加剂主要用作轮胎和其他橡胶或聚合物产品的防臭氧剂。 5.2 由于该测试方法的结果基于面积归一化,因此假设所有成分均从柱中洗脱,并且每个成分具有相同的检测器响应。虽然严格来说这并不是真的,但引入的误差相对较小,对于所有样本来说几乎相同;因此,可以忽略它们,因为测试方法的目的是建立相对纯度。 5.3 尽管生产样品中存在微量的“低沸点”,但在使用填充柱时,它们被溶剂峰所掩盖(程序A)。
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. ====== Significance And Use ====== 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).
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归口单位: D11.11
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