1.1 本试验方法包括硫化氢（H 2. S） 在气体燃料中。适用于H的测量 2. 天然气、液化石油气（LPG）、替代天然气、填埋气、污水处理废气、循环气、火炬气和燃料气体混合物中的S。该方法也可用于测量二氧化碳中硫化氢的浓度。空气不会干扰。适用范围为0.1至16体积份（ppm/v）（约0.1至22 mg/m 3. )并且可以扩展到100 % H 2. S通过手动或自动体积稀释。 1.2 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。 1.3 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====== 5.1 该试验方法可用于测定气体样品中硫化氢的浓度，并可用于验证是否符合H的操作需求和/或环境限制 2. S含量。该方法的自动化性能操作允许无人值守地测量H 2. S浓度。用户参考实践 天7166 用于基于醋酸铅反应速率法的仪器的无人值守在线使用。

1.1 This test method covers the determination of hydrogen sulfide (H 2 S) in gaseous fuels. It is applicable to the measurement of H 2 S in natural gas, liquefied petroleum gas (LPG), substitute natural gas, landfill gas, sewage treatment off gasses, recycle gas, flare gasses, and mixtures of fuel gases. This method can also be used to measure the hydrogen sulfide concentration in carbon dioxide. Air does not interfere. The applicable range is 0.1 to 16 parts per million by volume (ppm/v) (approximately 0.1 to 22 mg/m 3 ) and may be extended to 100 % H 2 S by manual or automatic volumetric dilution. 1.2 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. 1.3 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 This test method is useful in determining the concentration of hydrogen sulfide in gaseous samples and in verifying compliance with operational needs and/or environmental limitations for H 2 S content. The automated performance operation of this method allows unattended measurement of H 2 S concentration. The user is referred to Practice D7166 for unattended on-line use of instrumentation based upon the lead acetate reaction rate method.