A dry and degassed adsorbent sample of known weight was enclosed in the adsorption cell. Reactions of diazenes should employ degassed solvents to avoid radical reactions with oxygen. The resulting cobalt cathodes are crushed and vacuum degassed to obtain a pure cobalt metal. To prevent this type of "vapor lock", chromatography solvents are often degassed before pumping. Finally, the degassed magma is pushed upward, filling the cone. The raw material is mixed with degassed and then poured into the mold. CO is degassed from solution as CaCO is deposited to create the calthemite stalactites.