本文件规定了在550°C下测定点火损失（LOI）的方法。根据EN 15934测定干物质。 本方法适用于测定沉积物、污泥、处理过的生物废物、土壤和废物的着火损失。 注:点火损失通常用作样品中有机物含量的估计值。无机物质或分解产物（如H2O、CO2、SO2、O2）被释放或吸收，并且一些无机物质在反应条件下易挥发。

This document specifies a method for the determination of the loss on ignition (LOI) at 550 °C. The dry matter is determined according to EN 15934. This method applies to the determination of loss on ignition of sediment, sludge, treated biowaste, soil and waste. NOTE The loss on ignition is often used as an estimate for the content of organic matter in the sample. Inorganic substances or decomposition products (e.g. H2O, CO2, SO2, O2) are released or absorbed and some inorganic substances are volatile under the reaction conditions.