DIN EN ISO 18134-2:2024-06

This document describes the method of determining the total moisture content of a test sample of solid biofuels by drying in an oven and may be used when the highest precision is not needed, such as for routine production control on site. The method described in this document is applicable to all solid biofuels. The moisture content of solid biofuels (as received) is always reported based on the total mass of the test sample (wet basis). The difference with this procedure compared to the reference method ISO 18134-1 is that the effect due to buoyancy is neglected and only a single determination is required. The weight of a tray when still hot is less than the weight of the cold tray due to buoyancy. The magnitude of the buoyancy effect depends on the size and the weight of the tray. Biomass materials can contain small amounts of volatile organic compounds (VOC) which can evaporate when determining moisture content by oven drying. The release of such compounds is quite small relative to the overall moisture content as determined by this method and is disregarded in this document. The responsible national standardization committee is Working Committee NA 062-05-82 AA "Feste Biobrennstoffe" ("Solid biofuels") at DIN Standards Committee Materials Testing (NMP).