1.1 本试验方法适用于测定0.6 mg/m之间大气中的一氧化碳（CO）浓度 3. （0.5 ppm（v））和115 mg/m 3. （100 ppm（v））。测量原理基于4.7μm区域内CO对红外辐射的吸收 ( 1. ) . 2. 1.2 该试验方法的检测限约为0.6 mg/m 3. （0.5 ppm（v））空气中的一氧化碳。 1.3 以国际单位制表示的数值应视为标准值。括号中的值和单位仅供参考，不被视为标准值。 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。 参见第节 9 其他注意事项。 1.5 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====== 5.1 一氧化碳的测定对于评估许多空气污染问题和污染控制策略至关重要。本试验方法通过提供此类测定而具有重要意义。 5.2 一氧化碳是在碳氢燃料不完全燃烧过程中形成的，是汽油发动机排气的一种成分。环境保护局（EPA）已经为一氧化碳制定了一级和二级空气质量标准，旨在保护公众健康和福利 ( 3. , 4. ) . 5.3 本试验方法适用于适用于中所述目的的测量 5.1 和 5.2 .

1.1 This test method is applicable to the determination of the carbon monoxide (CO) concentration of the atmosphere between 0.6 mg/m 3 (0.5 ppm(v)) and 115 mg/m 3 (100 ppm(v)). The measuring principle is based on the absorption of infrared radiation by CO in the 4.7 μm region ( 1 ) . 2 1.2 The test method has a limit of detection of about 0.6 mg/m 3 (0.5 ppm(v)) carbon monoxide in air. 1.3 The values stated in SI units are to be regarded as standard. The values and units in parentheses are provided for information only and are not considered 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. See Section 9 for additional precautions. 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 ====== 5.1 Determination of carbon monoxide is essential to evaluation of many air pollution concerns and pollution control strategies. This test method derives significance from providing such determination. 5.2 Carbon monoxide is formed in the process of incomplete combustion of hydrocarbon fuels, and is a constituent of the exhaust of gasoline engines. The Environmental Protection Agency (EPA) has set primary and secondary air quality standards for CO that are designed to protect the public health and welfare ( 3 , 4 ) . 5.3 This test method is suitable for measurements appropriate for the purposes noted in 5.1 and 5.2 .