BUCHI Extraction System B-811 LSV - Manual (Page 26)

4 Description of function
26 B-811 Operation Manual, Version G
4 .5 .2 Extractions with rinsing and without drying
Step 1: Enter the parameters of step 1 according to table.
Step 2: Enter lower heating level and rinsing time.
Step 3 - 9: Set parameters to 0. Store program.
Table with parameters to be entered:
Soxhlet Standard Soxhlet Warm Hot Extraction Continuous
Step 1 lower heating
level
Extraction time
and / or number
of cycles
upper and lower
heating level
Extraction time
and / or number of
cycles
upper and lower
heating level
Extraction time
lower heating
level
Extraction time
Step 2 lower heating level
rinsing time
Step 3 - 9 lower heating level = 0
drying time = 0
At the end of the program the solvent containing the extract/analyte remains in the beaker. The step
2a is not activated (no concentration to dryness!).
4 .5 .3 Extractions without rinsing and with drying
Step 1: Enter parameters of step 1 according to table.
Step 2: Set parameters to 0.
Step 3-9: Enter lower heating and drying time for every further step. Store program.
Table with parameters to be entered:
Soxhlet Standard Soxhlet Warm Hot Extraction Continuous
Step 1 lower heating
level
Extraction time
and / or number
of cycles
upper and lower
heating level
Extraction time
and / or number of
cycles
upper and lower
heating level
Extraction time
lower heating
level
Extraction time
Step 2 lower heating level = 0
rinsing time = 0
Step 3 - 9 lower heating level
drying time
The rinsing of the sample is skipped. The drying can be performed by decreasing the lower heating
level from step to step (3 - 9). The sample is dried slowly. This is recommended for volatile and/or
heat-sensitive analytes.
A mild drying is performed by using the inert gas option to prevent oxidation. It is activated by pressing
the INERT GAS key and remains activated until the step is finished. When the program is expired the
solvent is collected in the extraction chamber (automated solvent recovery) and the analyte/extract is
in the beaker.