Evaluation of solid-phase extraction sorbent with ketoimine groups for the preconcentration of benzene and phenolic compounds in water


Abstract: The applicability of silica gel, modified with ketoimine groups, to solid phase extraction (SPE) was tested. Basic characteristics of the modified silica were determined using elemental analysis, and ^{29}Si CP MAS NMR spectroscopy, as well as measurement of specific surface area. Some applications of the sorbent studied to preconcentration and further determination of organic compounds, such as benzene, phenol, and o-chlorophenol, by means of solid-phase extraction (SPE) and gas chromatography are presented. The determined recovery rates were about 95%-98%.

Keywords: Modified silica, solid-phase extraction SPE, sorbents, hydrocarbon analysis.

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