Buchi K-355, Руководство по эксплуатации

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4 Description of function
17
K-355 Operation Manual, Version G
4 .2 Function principle
The Distillation Unit K-355 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).
1
2
3
4
5
a
Sample tube
b
Splash protector
c
Condenser
d
Distillate outlet tube
e
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
c
) the condensate is collected in
a receiver solution (in receiving vessel
e
).