ISO 14780:2017定义了将组合样品（或增量）减少为实验室样品、将实验室样品减少为子样品和一般分析样品的方法，适用于固体生物燃料。 本文件中定义的方法可用于样品制备，例如，当测试样品的热值、水分含量、灰分含量、堆积密度、耐久性、粒度分布、灰分熔融行为、化学成分和杂质时。

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.