• Replace the cotton wool. It should be replaced earlier when the upper half becomes dark.
See chapter Reagent tubes filling
NOTICE
The above is related to steel analyses and oxygen 99.5% pure.
NOTICE
There are especially developed chemical qualities and accelerators for analytical instruments.
– Magnesium perchlorate (Anhydrone), Sodium hydroxide (ascarite) and iron phosphate,
among others. Normal commercially available materials of this type either fall short or
they are entirely useless for this purpose.
– Normal magnesium perchlorate, for example, causes memory effects causing non
repeatable results. A further typical effect is that the analysis takes too long and often
never comes to an end. This effect also occurs with magnesium perchlorate of suitable
quality after been saturated.
– Normal sodium hydroxide binds CO2 quite inadequately at room temperature. The
special quality, on the other hand, reacts quite well at room temperature and has at the
same time an indicator (grey coloration when saturated).
– The glass tubes and the O-rings should only be greased with high vacuum grease.
Ordinary silicon grease is inadequate.
– It is up to the user to test common materials. The analyzer will not be damaged. When
however problems appear, proper quality materials should be used which are in
absolutely unsaturated condition, before technical service is called.
– The chemical flasks must be immediately and quite securely closed, so that they are not
saturated with CO2 or moisture from the environmental air.
6.2 Reagent tubes – removing and installing
Injuries in the form of cuts and other personal injuries
Danger from glass splitters
– Injuries in the form of cuts can be caused by damaged sample flasks and
glass splitters.
• Replace damaged sample flasks
• Do not touch glass splitters with your hands.
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