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Solid recovered fuels — Determination of moisture content using the oven dry method — Part 2: Determination of total moisture by a simplified method
This document specifies a method for determination of the moisture content in a test portion of the laboratory sample by drying the test portion in an oven. This method is applicable for routine production control on site, e.g. if a high precision of the determination of moisture content is not required. It is applicable to all solid recovered fuels.
If the solid recovered fuel contains large amounts of oil-fractions, a lower temperature is advisable (e.g. 50 °C ± 10 °C) and a longer drying time until constant mass is achieved. As an alternative, the Karl-Fischer-Titration-Method (see ISO 760[1]) is advisable.
NOTE 1 The total moisture content of recovered fuels is not an absolute value and therefore standardised conditions for its determination are indispensable to enable comparative determinations.
NOTE 2 The term moisture content when used with recovered materials can be misleading since solid recovered materials, e.g. biomass, frequently contain varying amounts of volatile compounds (extractives) which can evaporate when determining the moisture content of the general analyses sample by oven drying.
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