Oven for the hot extraction of gaseous measurement components, such as carbon dioxide, sulphur dioxide or hydrogen, contained in diverse solids samples having different melting points

摘要

The invention relates to an oven for the serial hot extraction of gases, such as carbon and sulphur, which are contained in diverse solids. The oven consists of a tubular electric resistant heating element 5 of graphite, axially clamped between electrodes 2,4, a ceramic tube 12 which is sealed from this heating element 5 and from the atmosphere and extends through the tubular resistance heating element 5 and in which the oven space 20 is formed, and of a ram 17 which can be introduced from below into the tube 12 and is designed as carrier for a ceramic crucible 18, and of a lance 15, which can be introduced from above into the tube 12, for a reaction gas (carrier gas). In contrast to the crucibles in other ovens for the serial hot extraction, the receiving capacity of the crucible 18 is designed for only a single sample, so that the sample contained therein can be brought quickly to the correction extraction temperature. The ceramic tube 12 screens the oven space 20 from the exterior. Owing to the use of a graphite electrode as the resistance heating element 5, the desired different temperature for a particular sample can be adjusted and the heating can be carried out quickly. By means of the ram 17, the crucible 18 can also be removed quickly out of the oven space 20 and a new crucible can be introduced into the oven space 20, so that the investigations of various samples can be carried out in quick succession... Original abstract incomplete. <IMAGE>