1.1 本规程涵盖了使用有源开路傅立叶变换红外（OP/FT-IR）监测器测量空气中气体和蒸汽浓度的程序。给出了选择仪器参数、初始操作仪器、解决后勤问题、进行辅助测量、选择监测路径、获取数据、分析数据以及对数据进行质量控制的程序。由于每个OP/FT-IR监测计划的后勤和数据质量目标是独特的，因此本实践中未明确规定测量特定气体浓度的标准化程序。相反，描述了适用于所有红外活性气体和蒸汽的一般程序。这些程序可用于制定特定OP/FT的标准操作程序- 红外监测应用。 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 本规程并非旨在解决与其使用相关的所有安全问题（如有）。本规程的使用者有责任制定适当的安全、健康和环境规程，并在使用前确定监管限制的适用性。 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 OP/FT-IR监测器原则上可以测量大气中所有红外活性气体和蒸汽的浓度。详细描述了OP/FT-IR系统及其操作的基本方面 E1685 以及FT-IR开放路径监测指导文件。简编方法to-16中给出了一种处理OP/FT-IR数据以获得长开放路径上气体浓度的方法。OP/FT-IR系统的应用包括监测环境空气中的气体和蒸汽，沿着工业设施的周边，在危险废物场地和垃圾填埋场，以应对意外的化学品泄漏或释放，以及在工作环境中。

1.1 This practice covers procedures for using active open-path Fourier transform infrared (OP/FT-IR) monitors to measure the concentrations of gases and vapors in air. Procedures for choosing the instrumental parameters, initially operating the instrument, addressing logistical concerns, making ancillary measurements, selecting the monitoring path, acquiring data, analyzing the data, and performing quality control on the data are given. Because the logistics and data quality objectives of each OP/FT-IR monitoring program will be unique, standardized procedures for measuring the concentrations of specific gases are not explicitly set forth in this practice. Instead, general procedures that are applicable to all IR-active gases and vapors are described. These procedures can be used to develop standard operating procedures for specific OP/FT-IR monitoring applications. 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 practice 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 practice to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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 An OP/FT-IR monitor can, in principle, measure the concentrations of all IR-active gases and vapors in the atmosphere. Detailed descriptions of OP/FT-IR systems and the fundamental aspects of their operation are given in Practice E1685 and the FT-IR Open-Path Monitoring Guidance Document. A method for processing OP/FT-IR data to obtain the concentrations of gases over a long, open path is given in Compendium Method TO-16. Applications of OP/FT-IR systems include monitoring for gases and vapors in ambient air, along the perimeter of an industrial facility, at hazardous waste sites and landfills, in response to accidental chemical spills or releases, and in workplace environments.