The molecular interactions involved during an extraction can be:
Van der Waals covalent No, this type of interaction is irreversible and therefore modifies the structure of the analyte hydrogen bond type hydrophobic
The extraction of a compound of interest is more difficult from a solid sample than from a liquid sample.
False True See the “A little theory”/“Extraction from solid matrices” tabs of this sheet
Extraction from a solid sample will be made easier by:
grinding See the “A little theory”/“Extraction from solid matrices” tabs of this sheet an increase in pressure an increase in temperature See the “A little theory”/“Extraction from solid matrices” tabs of this sheet reduced extraction time
The quantitative results obtained with a "spiked" solid matrix must be confirmed on a real matrix (certified reference material if possible or by successive extractions of the sample).
False True See “Experimental procedure”/“Method development” tabs of this sheet
