规定了粗样品和干燥样品以及氟化钠/三氟化铝摩尔比约为3至1.7的天然和合成材料的制备程序。粗样品用于确定几何特征、某些物理和物理化学试验以及水分测定。干燥的样品特别用于化学试验。该程序的原理在于研磨，然后筛分样品，直到整个样品通过孔径为0125mm的筛子。 在约110°C下充分混合并干燥。

Specifies the procedure for the preparation of crude samples and dried samples and of natural and synthetic materials having a molar ratio sodium fluoride/aluminium trifluoride between 3 and 1,7 approximately. The crude sample is intended for the determination of geometric characteristics, for certain physical and physico-chemical tests and for moisture determination. The dried sample serves especially for chemical tests. The principle of the procedure consists in grinding followed by sieving of the sample until the whole passes through a sieve of mesh aperture 0,125 mm. Thorough mixing and drying at approximately 110 °C.