1.1 本试验方法适用于从加固屋顶膜或织物中提取酮-乙烯酯（KEE）和聚氯乙烯（PVC）后其相对含量的测定。基于质子核磁共振波谱( 1. H-NMR），该方法允许相对于内标对PVC进行定量。然后通过差值获得KEE含量。该试验方法不适用于含有除PVC和KEE以外的高分子量聚合物的膜或混合物。 1.2 单位-- 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 片材屋面中KEE化合物百分比的测定是许多规范制定者和建筑业主关注的问题。方法A，速度较快的方法，最好用于质量控制。方法B可能更适用于研究和开发或调查工作。

1.1 This test method pertains to the determination of the relative contents of ketone-ethylene-ester (KEE) and polyvinyl chloride (PVC) after their extraction from reinforced roofing membranes or fabrics. Based on proton nuclear magnetic resonance spectroscopy ( 1 H-NMR), the method allows for the quantification of PVC with respect to an internal standard. The KEE content is then obtained by difference. The test method is not applicable to membranes or blends that contain high molecular weight polymers other than PVC and KEE. 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 Determination of the percentage of KEE compound in sheet roofing is of concern to many specifiers and building owners. Method A, the faster method, is best used for quality control. Method B may apply better to research and development or investigative work.