1.1本试验方法涵盖了总量的测定 p -添加到丁二烯聚合和回收级或其他C 4. 不含儿茶酚以外的酚类物质或不含儿茶酚氧化以外的氧化酚类物质的碳氢化合物混合物。通常，所有酚及其醌氧化产物都包含在计算的儿茶酚含量中。少量聚合物不会干扰。本试验方法适用于50至500 mg/kg的TBC范围。 1.2以国际单位制表示的数值应视为标准值。 以英寸-磅为单位的数值仅供参考。 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和健康实践，并确定监管限制的适用性。

1.1 This test method covers the determination of total p -tertiary-butylcatechol inhibitor added to polymerization and recycle grades of butadiene or to other C 4 hydrocarbon mixtures containing no phenolic material other than catechol or no oxidized phenolic material other than that derived from oxidation of catechol. In general, all phenols and their quinone oxidation products are included in the calculated catechol content. Small amounts of polymer do not interfere. This test method is applicable over the range of TBC from 50 to 500 mg/kg. 1.2 The values stated in SI units are to be regarded as standard. The values stated in inch-pound units 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 and health practices and determine the applicability of regulatory limitations prior to use.