本文件定义了一种测定木质和非木质生物质（包括颗粒和煤球等致密材料，以及木屑等非致密材料）排气（永久性气体）和耗氧的方法。该方法也适用于热处理材料，包括加热和碳化材料。 通过气相色谱法测定封闭试验容器内样品排放的各种气体种类的排放和消耗系数以及排放和消耗率。 排放和损耗系数以及排放和损耗率为通风要求提供了指导，以使工人暴露在封闭大气中的空间内的气体浓度保持在允许暴露水平（PEL）以下。

This document defines a method for determination of off-gassing (permanent gases) and oxygen depletion from woody as well as non-woody biomass, including densified materials such as pellets and briquettes, as well as non-densified materials such as chips. The method is also applicable for thermally treated materials, including torrefied and carbonized materials. The emission and depletion factor and emission and depletion rate for various gas species emitted from sample within a closed test container is determined by means of gas chromatography. The emission and depletion factor and emission and depletion rate provide guidance for ventilation requirements to keep gas concentrations below Permissible Exposure Levels (PEL) in spaces where workers can be exposed to the enclosed atmosphere.