BUCHI Extraction System B-811 LSV - Manual (Page 43)

6 Operation
43 B-811 Operation Manual, Version G
6 .11 Choosing the heating parameters
The following heating parameters are recommended:
Heating setting Heating setting
Solvent BP / °C lower upper
Acetone 56.1 11 3
Ethanol 78.4 16 4
Methanol 64.6 14 4
Xylol 139.5 15 10
Dichloromethane 39.9 9 2
Petroleum ether 40/60 40-60 9 2
n-Hexane 68.8 10 4
Toluene 110.6 13 6
Methylethylketone (MEK) 79.6 11 4
Water 100 20 10
If further heating parameters are required, please refer to the Application Note Nr. 811049 en.
All instrument components in contact with the solvent/sample/analyte are inert. Residual effects
(memory effects) are fully eliminated.
NOTE
The choice of higher heating settings can lead to solvent loss because the cooling capacity is
exceeded. Solvent loss can also be caused by damaged PTFE seals (order number 037388) and
beakers (order number 037276 and 038597). If solvent loss appears the chemical resistance of some
instrument components can be remarkably reduced.
6 .12 Solvent addition during extraction
During the extraction an addition of solvent is possible. The solvent is added
through the condensation tube directly into the sample using a pipette, rinsing
bottles, a dispenser or other solvent delivery devices.
Fig. 6.6: Solvent addition during extraction