BUCHI Extraction System B-811 LSV - Manual (Page 27)

4 Description of function
27 B-811 Operation Manual, Version G
4 .5 .4 Extractions with rinsing and with drying
Step 1: Enter parameters of step 1 according to table.
Step 2: Enter lower heating level and rinsing time.
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
rinsing time
Step 3 - 9 lower heating level
drying time
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.