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کشاورزی::
استخراج حلال
Exhaustive methods such as solvent extraction, or SAFE (see Chapter 2), reflect the composition of the food, but are sub- ject to losses of the most volatile components during work-up and do not account for the relative volatility of the individual components, thus the role of high molecular weight compounds may be exaggerated.
Foods consumed as liquids can be extracted directly, with no preliminary preparation, although prior filtration may be necessary for solvent extraction of liquids containing particulates, such as orange juice.
For a solvent extraction, a blank could be prepared using the same glassware but with water replacing the food sample.
In a typical SAFE procedure, a solvent extract of the food under study is prepared, usually by shaking the food with 2-3 volumes of solvent at room temperature.
The solvent extract passes into the distillation chamber of the SAFE via a dropping
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