Kui proov on niiskem kui alapunktis 4.2.1 toodud, tuleb teha eelkuivatus. Peenestamata proovi (terad) massiga M0 (paraja jahvatusvaruga) kuumutada vastavalt alapunktile 5.3.1 7 min kuni 10 min jooksul ja jahutada toatemperatuuril avatud kaalunõudes väljaspool eksikaatorit. Jahtumisaeg 30 min.
Pre-drying:
Grains with a moisture content higher than 17 % must be pre-dried as follows :
Weigh 50 grammes of unground grain in a suitable receptacle (e.g. a 20 by 12 centimetre aluminium plate with a 0.5 centimetre rim ), leave to dry in a heating chamber for seven to ten minutes at a temperature of 130 °C, remove from the heating chamber, leave the grains uncovered to cool in the laboratory for two hours and weigh (weighing must be accurate to 10 milligrammes).
