BUCHI KjelFlex K-360 - Manual (Page 20)

4 Description of function
20 KjelFlex K-360 Operation Manual, Version C
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 •