固定源排放 - 确定非燃烧过程废气中各种挥发性有机化合物（VOC）的质量浓度

[中文适用范围]： 本文件规定了使用 FTIR 光谱法测定非燃烧过程废气中单个挥发性有机化合物 (VOC) 的浓度。 该方法可用于连续分析从管道和其他来源提取的样气。 如果化合物不吸附在袋材料上，也可以采用袋取样方法，并且适用于难以或不可能获得直接提取样品的情况。 本文件描述了原理、采样程序、红外光谱测量和分析、校准、干扰处理、QA/QC 程序以及单个 VOC 测量的一些基本性能标准。 注 1：该方法的实际最小可检测浓度取决于所使用的 FTIR 仪器（即气池路径长度、分辨率、仪器噪声和分析算法）、化合物和特定干扰（例如水和 CO2）。 [外文原描述]： This document specifies the use of FTIR spectrometry for determining the concentrations of individual volatile organic compounds (VOCs) in waste gases from non-combustion processes. The method can be employed to continuously analyse sample gas which is extracted from ducts and other sources. A bag sampling method can also be applied, if the compounds do not adsorb on the bag material, and is appropriate in cases where it is difficult or impossible to obtain a direct extractive sample. The principle, sampling procedure, IR spectral measurement and analysis, calibration, handling interference, QA/QC procedures and some essential performance criteria for measurement of individual VOCs are described in this document. NOTE 1 The practical minimum detectable concentration of this method depends on the FTIR instrument (i.e. gas cell path length, resolution, instrumental noise and analytical algorithm) used, compounds, and interference specific (e.g. water and CO 2 ).