1.1 这些试验方法包括以下三种在实验室试验室中测定臭氧含量的方法。方法A（紫外线吸收）规定用于参考或参考目的，并作为替代方法的校准手段；方法B，仪器设备（电化学或化学发光）；和方法C，湿化学技术（见 附录X1 ). 这些方法主要用于测定橡胶臭氧抗裂性的试验，因此适用于25至200 mPa的臭氧水平范围。 注1: 1978年之前，臭氧浓度在ASTM D11标准中表示为空气体积的每亿分之一（pphm）。看见 附录X2 用于解释分压的变化，单位为毫帕（mPa）。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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。有关具体的危险声明，请参阅 注释2 和 5.1 . 注2: 警告臭氧是一种危险化学品。 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====== 4.1 当试样或实际使用的产品在一定程度的拉伸应变下暴露在含有臭氧的大气中时，通用橡胶和许多特种橡胶将发生臭氧开裂。 某些添加剂，如抗臭氧剂和蜡，可以抑制或防止这种开裂。各种橡胶和含有此类添加剂的橡胶配方通常在实验室臭氧室的静态或动态拉伸应变下进行评估。本标准规定了对试验方法中使用的此类腔室的臭氧含量的准确评估 D518 , D1149 , D1171 , D3395 和ISO标准 1431 I/II/III.有关臭氧分析的更多信息，请参阅《联邦法规》；标题40第1至51部分。

1.1 These test methods cover the following three types of methods for the determination of ozone content in laboratory test chambers. Method A (UV absorption) is specified for reference or referee purposes and as a means of calibration for the alternative methods; Method B, instrumental device (electrochemical or chemiluminescence); and Method C, wet chemical techniques (see Appendix X1 ). These methods are primarily intended for use with tests for determining rubber ozone cracking resistance and thus are applicable over the ozone level range from 25 to 200 mPa. Note 1: Prior to 1978, ozone concentrations were expressed in ASTM D11 Standards in parts per hundred million (pphm) of air by volume. See Appendix X2 for an explanation of the change to partial pressure in millipascals (mPa). 1.2 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. For a specific hazard statement, see Note 2 and 5.1 . Note 2: Warning—Ozone is a hazardous chemical. 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 ====== 4.1 General purpose and many specialty rubbers will undergo ozone cracking when exposed to ozone containing atmospheres, when the test specimens or actual use products are under a certain degree of tensile strain. Certain additives such as antiozonants and waxes inhibit or prevent this cracking. Various rubbers and rubber formulations containing such additives are customarily evaluated under static or dynamic tensile strain in laboratory ozone chambers. This standard provides for an accurate assessment of the ozone content of such chambers used in Test Methods D518 , D1149 , D1171 , D3395 and ISO Standard 1431 I/II/III. For additional information on ozone analysis, refer to Code of Federal Regulations; Title 40 Parts 1 to 51.