1.1 本试验方法包括测定丁腈橡胶（NBR）、苯乙烯-丙烯腈（SAN）共聚物和橡胶改性丙烯腈-丁二烯-苯乙烯（ABS）树脂中的残留丙烯腈（RAN）含量。 1.2 任何能在顶部空间程序中产生丙烯腈的成分都将构成干扰。胶乳中3-羟基丙腈的存在限制了该程序用于干燥橡胶和树脂。 1.3 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.4 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。 中给出了具体的预防说明 6.3 和 6.4 。 注1: 目前还没有与该标准等效的ISO。 1.5 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====== 4.1 丁腈橡胶（NBR）、苯乙烯-丙烯腈共聚物或ABS三元共聚物中残留丙烯腈的测量将决定聚合物是否适合各种应用。 4.2 在最佳条件下，NBR、SAN或ABS三元共聚物中RAN的最低检测水平约为50ppb。

1.1 This test method covers the determination of the residual acrylonitrile (RAN) content in nitrile-butadiene rubbers (NBR), styrene-acrylonitrile (SAN) copolymers, and rubber-modified acrylonitrile-butadiene-styrene (ABS) resins. 1.2 Any components that can generate acrylonitrile in the headspace procedure will constitute an interference. The presence of 3-hydroxypropionitrile in latices limits this procedure to dry rubbers and resins. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. Specific precautionary statements are given in 6.3 and 6.4 . Note 1: There is no known ISO equivalent to this standard. 1.5 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 ====== 4.1 A measurement of the residual acrylonitrile in nitrile rubbers (NBR), styrene-acrylonitrile copolymers or ABS terpolymers will determine the polymer's suitability for various applications. 4.2 Under optimum conditions, the minimum level of detection of RAN in NBR, SAN, or ABS terpolymers is approximately 50 ppb.