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The interaction properties of some alkylsiloxane-, phenylsiloxane-and cyanopropylsiloxane-bonded silica-based sorbents for solid phase extraction are characterized. The linear solvation energy relationship model is used to estimate the characteristic interaction constants of the sorbents, s (dipolarity/polarizability), a (hydrogen bonding basicity), b (hydrogen bonding acidity), r (polarizability), and l (methylene selectivity). For nonpolar alkyl-bonded sorbents, the l constant is the largest,doi:10.2116/analsci.12.733 fatcat:z7x5irlapbaa3cciznjo2b3urq