Division 6.1 Preparation of the dish

Heat a dish (4.4.) with its lid placed next to it in the oven (4.3.), controlled at 102 ± 2 ^oC, for at least 30 minutes. Place the lid on the dish and immediately transfer to the desiccator (4.2.), allow to cool to room temperature (i.e. for at least 30 minutes) and weigh to the nearest 0,1 mg.