拟议的国际标准描述了将组合样品（或增量）减少到实验室的方法 样品和实验室样品到子样品和一般分析样品，适用于固体生物燃料。 本提议文件中描述的方法可用于样品制备，例如， 测试样品的热值，含水量，灰分含量，堆积密度，耐久性，粒度 分布，灰分熔融行为，化学成分和杂质。这些方法不是要的 应用于测试桥接性能所需的非常大的样品

ISO 14780:2017 defines methods for reducing combined samples (or increments) to laboratory samples and laboratory samples to sub-samples and general analysis samples and is applicable to solid biofuels. The methods defined in this document can be used for sample preparation, for example, when the samples are to be tested for calorific value, moisture content, ash content, bulk density, durability, particle size distribution, ash melting behaviour, chemical composition, and impurities.