1.1 本试验方法包括氮氧化物（NO和NO）的测定 2. )、一氧化碳（CO）和氧气（O 2. )使用带有电化学传感器的便携式分析仪的天然气往复式发动机、燃气轮机、锅炉和过程加热器的受控和非受控排放物中的浓度。由于电化学电池固有的交叉灵敏度，在未完全调查可能的分析干扰并与EPA测试方法进行比较评估的情况下，该测试方法不应适用于其他污染物或排放源。 1.1.1 本试验方法的程序和规范最初是在气体研究所（GRI）资助的实验室和现场试验期间制定的。 2. 仅对天然气燃烧源进行了比较排放试验。随后，美国环境保护局（EPA）赞助的环境技术验证（ETV）项目对电化学电池分析仪进行了进一步评估，包括对天然气和柴油发电机的实验室测试和现场测试。环保局审查了ETV测试结果，发布了附加信息，并提供了在更新该测试方法时考虑的技术输入。 3. 1.2 本试验方法包含解释性注释，不属于本标准强制性要求的一部分。 1.3 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。 1.4 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。 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 本试验方法的结果可用于确定固定源天然气燃烧产生的氮氧化物和一氧化碳排放浓度。 5.2 该试验方法也可用于在短期排放试验期间或定期监测排放，以优化氮氧化物和一氧化碳控制的工艺操作。

1.1 This test method covers the determination of nitrogen oxides (NO and NO 2 ), carbon monoxide (CO), and oxygen (O 2 ) concentrations in controlled and uncontrolled emissions from natural gas-fired reciprocating engines, combustion turbines, boilers, and process heaters using portable analyzers with electrochemical sensors. Due to the inherent cross sensitivities of the electrochemical cells, this test method should not be applied to other pollutants or emission sources without a complete investigation of possible analytical interferences and a comparative evaluation with EPA test methods. 1.1.1 The procedures and specifications of this test method were originally developed during laboratory and field tests funded by the Gas Research Institute (GRI). 2 Comparative emission tests were conducted only on natural gas-fired combustion sources. Subsequently, the U.S. Environmental Protection Agency (EPA) sponsored Environmental Technology Verification (ETV) program conducted further evaluations of electrochemical cell analyzers, which included laboratory tests and field tests on natural gas and diesel-fueled generators. The EPA has reviewed the ETV test results, published additional information, and provided technical input that has been considered in the update of this test method. 3 1.2 This test method contains notes that are explanatory and are not part of the mandatory requirements of the standard. 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. 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 The results of this test method may be used to determine nitrogen oxides and carbon monoxide emission concentrations from natural gas combustion at stationary sources. 5.2 This test method may also be used to monitor emissions during short-term emission tests or periodically in order to optimize process operation for nitrogen oxides and carbon monoxide control.