5.6.2.1 Coal analysis
Furnace temperature: 1350°C.
Sample weight around 300mg, depending on the sensitivity of the analyzer and on the C and S
content of the sample. The sample weight should not be higher than 500mg. The sample should
be put into the front part of the combustion boat. Press “START” and push the combustion boat
directly into the hot zone up to the boat stop. Usually, no accelerators are needed. Only in
exceptional cases, when the sample contains pyrites, the furnace temperature has to be set at
1500°C or approx. 300mg iron phosphate have to be spread upon the sample.
There are two different types of combustion boats available:
: Combustion boat types
Due to the front shape of the combustion boat type 2, it should be carefully pushed up to the
boat stop, otherwise it may slide into the boat stop. Stop pushing as soon as the boat stop is
reached.
– The combustion boat (1) is reusable (10, 20, 30 analyses or more).
– The combustion boat (2) can only be used once.
5.6.2.2 Oil, plastics, asphalt and rubber analysis
For fuel oil and other thick oils, the sample weight is approx. 80mg.
The sample weight should never exceed 100mg.
For thin oil analysis, the sample weight should not be higher than 50mg.
For plastics take sample weights between 50 and 100 mg.
• Adjust the furnace temperature to 1450 °C.
• Weigh the sample of the above mentioned materials, 50 to 100mg.
• Transfer the weight to the PC.
• Start analysis (F5).
• Insert the boat very slowly up to the beginning of the hot zone.
• When you hear the noise of the ignition, stop pushing and put a marker on the insertion
rod, at the beginning of the furnace platform where the boats are placed on.
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