1. Measurement of the volume of gases emitted into contact with water or an acid (solid/liquid ratio of
10 L water or acid/kg raw waste, acid 2.5 M HNO3).
2. If gas is emitted at a rate higher than 0.1 L of gas/kg waste in 5 min (limit of quantification of the automated
calcimètre used here), checking if one of the cited gases is emitted with electrochemical detection
probes or simple qualitative colorimetric methods.
3. If one of these gases is detected, speciation of the emitting substance(s) (calculation by the ‘‘worst
case” method from elements concentrations, or by specific analytic methods) and checking whether
they have a hazard statement code EUH029, EUH031 or EUH032 (a list is provided).