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5.1x00a0;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.
5.2x00a0;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.
5.3x00a0;Although trace amounts of x201c;low boilersx201d; are present in production samples, they are disguised by the solvent peak when using packed columns (Procedure A).
1.1x00a0;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.
1.2x00a0;The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3x00a0;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.
1.4x00a0;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.
对苯二胺纯度的常规分析方法主要有化学分析方法和气相色谱法,本文参考GB/T 25789-2010《对苯二胺》建立了采用气相色谱法测定对苯二胺纯度的方法,可供品质检测及生产过程中工艺控制等相关人员参考。GC-4100气相色谱仪PART ONE实验部分实验原理样品经毛细管色谱柱分离,经氢火焰离子化检测器检测,用峰面积归一化定量。仪器与试剂GC-4100气相色谱仪(配FID检测器);乙腈;微量注射器。...
表1美国材料与测试协会(ASTM)D5466方法目标化合物清单一 表2美国材料与测试协会(ASTM)D5466方法目标化合物清单二国际标准化组织(ISO)方法国际标准化组织关于环境空气中挥发性有机物分析测定有:ISO16017溶吸附管/热解吸/气相色谱仪法测定室内空气、环境空气和工作场所空气中挥发性有机物、ISO16200-2001溶剂解吸/毛细管气相色谱仪法测定工作场所空气中挥发性有机物,目前还没有罐采样的标准方法...
表1美国材料与测试协会(ASTM)D5466方法目标化合物清单一 表2美国材料与测试协会(ASTM)D5466方法目标化合物清单二国际标准化组织(ISO)方法国际标准化组织关于环境空气中挥发性有机物分析测定有:ISO16017溶吸附管/热解吸/气相色谱仪法测定室内空气、环境空气和工作场所空气中挥发性有机物、ISO16200-2001溶剂解吸/毛细管气相色谱仪法测定工作场所空气中挥发性有机物,目前还没有罐采样的标准方法...
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