6. New supports for more selective extraction
It has been shown that residual ionized silanols, present in non-negligible quantities, depending on sample pH, on silica phases grafted with alkyl chains, facilitate the extraction of basic compounds. To enhance these electrostatic interactions, silica phases were grafted with both alkyl chains and ionized functions such as strong acids
and strong bases
...
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New supports for more selective extraction
References
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(1) - LOUTER (A.J.H.), VREULS (J.J.), BRINKMAN (U.A.Th.) -
On-line combination of aqueous-sample preparation and capillary gas chromatography
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. J. Chrom. A, 842, p. 391-426 (1999).
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(2) - HENNION (M.-C.), PICHON (V.) -
Solid-phase extraction of polar organic...
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