Maintenance and care
multi N/C 2100S (duo, pharma)
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Filling the combustion tube, for samples with high salt loads
With samples with high salt loads, the catalyst is filled onto a platinum net.
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For filling, fix the combustion tube in a stand.
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Insert the platinum net into the combustion tube and carefully press it
down with a glass rod.
The platinum net holds back the catalyst. Ensure that no catalyst can get
into the gas pathway.
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Carefully stack platinum catalyst (2) onto the platinum net approx. 4 cm
high.
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Roll up the HT mat (3) from the narrow side.
The roll must have a diameter of approx. 13 mm and a height of 2 cm to
slide into the combustion tube easily.
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Insert the rolled-up HT mat into the combustion tube and push it down
with a glass rod until the catalyst is covered.
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Only press the mat down lightly onto the catalyst.
The recommended operating temperature for this filling is 720 to 750 °C.
6.7.3
Installing the combustion tube
NOTICE
Sweat from your hands can reduce the service life of the combustion tube.
Alkaline salts from the sweat of your hands can cause crystallization in the quartz glass
when heating the combustion furnace. This reduces the service life of the combustion
tube.
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Avoid touching the cleaned combustion tube with your hands during filling. Wear
protective gloves.
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Only fill completely dried combustion tubes.
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Wipe off any finger marks with a cloth wetted with pure alcohol.
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Slide the union nut (1) onto the combustion tube.
