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4 example of an extraction process, 1 material and equipment, 2 preparing an extraction – BUCHI Extraction Unit E-816 SOX User Manual

Page 40: Example of an extraction process, 6 .4 example of an extraction process

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6 Operation

40

E-812/816 Soxhlet Operation Manual, Version B

Unit information
Select unit information. The following screen opens:

Fig. 6.26: Unit information

Here you get a short overview over technical instrument data.

6 .4

Example of an extraction process

6 .4 .1

Material and equipment

Before starting an extraction process all necessary materials and chemicals must be present:
• Fume hood (only when working with diethyl ether or chloroform)
• Cooling water connection
• Analytical balance (± 0.1 mg; minimal weight 200 g)
• Spatula
• Funnel
• Desiccator
• Solvent
• 2 or 6 beakers
• 2 or 6 glass sample tubes or thimbles
• Waste container for organic solvents
• Depending on the application: Silica sand, celite, glass wool and paper thimbles

NOTE
The holders for the glass sample tubes and the paper thimbles are not microwavable.

6 .4 .2

Preparing an extraction

To prepare the instrument for extraction, proceed as follows:
1. Dry the clean solvent beakers with three boiling stones each in the drying oven for 30 minutes, let

the beakers cool down to ambient temperature in the desiccator and weigh them.

2. Prepare the sample as required in the glass sample tubes with frits or in the paper thimbles, e.g.

hydrolysis and/or drying.

3. Place the prepared glass sample tube or paper thimble with the corresponding holder in the

extraction chamber.

4. Adjust the optical sensor above sample level.
5. Fill the organic solvent directly into the beakers.

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