Buchi KjelFlex K-360, Руководство по эксплуатации

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4 Description of function
20
KjelFlex K-360 Operation Manual, Version D
4 .2 Function principle
The KjelFlex K-360 is suitable for determining nitrogen using the Kjeldahl (TKN; Total Kjeldahl Nitrogen)
and Devarda methods as well as for other distillations of steam-volatile substances (e.g. of alcohol,
SO
2
, volatile acids).
5
1
3
4
2
6
a
Sample tube
b
Splash protector
c
Steam generator
d
Condenser
e
Distillate outlet tube
f
Receiving vessel with receiver solution
Fig. 4.2: Function principle
Steam is introduced into the sample solution (in sample tube
a
) to drive out volatile components
(such as ammonia, alcohol, etc.). After condensation (in condenser
d
) the distillate is collected in a
receiver solution (in receiving vessel
f
).
4 .3 Kjeldahl applications
Determination of nitrogen/protein.
For system configuration with reagent-pump:
Warnmeldung
4 .4 Non-Kjeldahl applications
Typical examples for non-Kjeldahl methods.
Determination of:
• SO
2
• Phenol
• Formaldehyde
• TVBN
• Alcohol
• Volatile acids