Buchi E-800 - Task During Performing an Extraction; Adding Solvent through the Condenser

BÜCHI Labortechnik AG Performing an extraction | 7
Operation Manual UniversalExtractor E-800 65/88
u Place the prepared glass sample tube or paper thimble with the corresponding
holder in the extraction chamber. See Chapter7.1.1 "Putting the glass sample
tube with frit in the extraction glass chamber", page62
u Push the chamber rack back in the instrument.
u Set the optical sensor to the correct position.
 For Soxhlet, Soxhlet Warm and Hot Extraction. See Chapter7.1.3 "Adjusting the
optical sensor (Soxhlet, Soxhlet Warm and Hot Extraction)", page63
 For Twisselmann Extraction . See Chapter7.1.2 "Adjusting the optical sensor
(Twisselmann and Continuous Extraction only)", page62
u Fill the organic solvent directly into the beakers.
u Place the beakers on the corresponding positions directly on the heating plate.
u Close the protection shield.
u Navigate to the [ Home ] menu via the navigation path.
u Tap the function [ Down ] on the function bar.
ð The lift moves down.
u Wait until the lift is in the lower position.
u Make sure that all components of the glass setup are aligned.
Testing procedure:
 Move each condenser a small distance forward and backward.
u Tap the function [ Start ] on the function bar.
ð The display shows the [ Home ] menu with a black background.
ð The instrument is starting the selected method.
u Wait until the solvent boils and condenses.
u Make sure that there are no leaks.
7.4 Task during performing an extraction
7.4.1 Adding solvent through the condenser
There are two possibilities to add solvent throught the condenser:
1. with a dispenser see Chapter "Adding solvent through the condenser with a dis-
penser", page65
2. with a beaker Chapter "Adding solvent through the condenser with a beaker",
page66
Adding solvent through the condenser with a dispenser
CAUTION
Not correctly installed condenser
A not correctly installed condenser can cause skin burns or a building fire
u A beaker is placed under the position.
u An extraction glass chamber is installed at the position.
u The lift is in the lower position.
NOTE
Boiling retardation
4 Make sure that the solvent is at ambient temperature.