The sample must be held at laboratory atmosphere for at least 24 h. The determination is then carried out. The connection with the device producing the vacuum is closed. The desiccation tube is closed again and vacuum drying carried out at 50 C as before. After cat 100 h the tube is removed from the drying oven and cooled to laboratory temperature.
Atmospheric pressure is restored inside as previously indicated.
The determination must be performed at least twice. The determination must be carried out at least twice. If this is not the case, another duplicate determination must be performed. The experimental report should give the method used and the result obtained. In addition, all details of the procedure which are not provided for in the present ICC-Standard or are optional must be mentioned, and any incidents which might have influenced the result.