Buchi K-435 - 5.4 Conducting Kjeldahl Digestion; 5.5 Conducting Kjeldahl Digestion in Remote Control Operation

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Digestion Unit K-435 5 Operation
5.4 Conducting Kjeldahl Digestion
• Turn on the apparatus a and preheat it at Setting 10 for
approx. 5 minutes.
• Wear protective goggles!
• Place the digestion glasses in the digestion glass holder b
on the rack c.
• Add the sample and the reagents to the digestion glasses
d.
• Close the unused connecting pieces with plug caps
(Art. No. 17396).
Never operate the apparatus with
empty digestion glasses!
• Place the suction module e with the mounted seals over
the digestion glass holder..
• Turn on scrubber or water jet pump before any gases form.
5.5 Conducting Kjeldahl Digestion in
Remote Control Operation
• Connect the Büchi Control Unit B-436 to the Digestion
Unit and turn on the apparatus.
• Enter the parameters on the B-436.
• Set the regulator on the Digestion Unit at Setting 0.
• Place the digestion glasses in the digestion glass holder
on the rack.
• Add the samples and the reagents to the digestion glasses.
• Close the unused connecting pieces with plug caps
(Art. No. 17396).
Never operate the apparatus with
empty digestion glasses!
• Place the suction module e with the mounted seals over
the digestion glass holder.
• Begin digestion by pressing the START button on the
Control Unit B-436 (Scrubber B-414 starts automatically;
manually start the water jet pump before any gases form).
b
c
d
a
Figure 10: Operation of K-435
e