When a sample is introduced into the sample inlet system, it enters the quartz combustion tube. The quartz combustion tube is placed into the furnace of the analyzer. The combustion tube is fabricated out of quartz glass to be able to withstand extreme temperatures up to 1150 °C.
The quartz combustion tube is constructed in such a way that it allows direct injection of the sample into the heated oxidation zone of the furnace and/or to accommodate the entry of a quartz sample boat. The surface of the oxidation section of the combustion tube must be large enough to ensure a complete combustion of the sample. However, some elemental combustion analyzer manufacturers pack the quartz combustion tube with oxidation catalyst to achieve this.
The XPLORER Series do not make use of oxidation catalyst. The unique construction of the Collision Flow Tube allows a secondary oxygen flow to collide with the combustion gases, which creates a dynamic turbulence of the oxidizing gas stream and replaces some of the depleted oxygen. Resulting in more oxidation power for samples which are difficult to oxidize. If the samples require a boat inlet system, the collision flow tube features the necesarry cooling mechanism, which is simply known as the Collision Flow Tube with Boat Cooling.
Quartz Combustion Tube