标准摘要
[中文适用范围]： 本国际标准描述了采样和测定环境大气中总非甲烷挥发性有机化合物（NMVOC）浓度的程序。 本国际标准描述了钝化不锈钢罐中累积样品的收集以及随后的实验室分析。 它描述了在高于大气压的最终压力下在罐中取样的程序（称为加压取样）。 它在分析之前采用低温捕获程序来浓缩 NMVOC。 本国际标准描述了通过简单的火焰离子化检测（FID）来测定 NMVOC，无需气相色谱柱和物种分离所需的复杂程序。 本国际标准适用于 20 ppbC 至 10 000 ppbC 范围内的碳浓度。 有关降低范围的步骤，请参见 12.4。 本国际标准中描述的方法也可以有多种变化；参见第 12 条。 [外文原描述]： This International Standard describes a procedure for sampling and determining concentrations of total nonmethane volatile organic compounds (NMVOC) in the ambient atmosphere. This International Standard describes the collection of cumulative samples in passivated stainless steel canisters and subsequent laboratory analysis. It describes a procedure for sampling in canisters at final pressures above atmospheric pressure (referred to as pressurized sampling). It employs a cryogenic trapping procedure for concentration of the NMVOC prior to analysis. This International Standard describes the determination of the NMVOC by simple flame ionization detection (FID), without the gas chromatographic columns and complex procedures necessary for species separation. This International Standard is applicable to carbon concentrations in the range from 20 ppbC to 10 000 ppbC. See 12.4 for procedures for lowering the range. Several variations to the method described in this International Standard are also possible; see clause 12.
英文名称Air quality — Determination of total non-methane organic compounds — Cryogenic preconcentration and direct flame ionization detection method