SPE and GC methods of preconcentration and determination of phenol, o-chlorophenol, and benzene by means of chemically modified silica
In the paper preparation, characteristics and potential applications of two new sorbents with chemically bonded transition metal complexes have been presented. The sorbents have been synthesized by attaching copper (II) chlorides to the silica surface through ketoimine groups. The suggested application area of the proposed sorbents is related with solid-phase extraction (SPE) of aromatic compounds of different structure, e.g., phenol, 2-chlorophenol, and benzene from water matrix. The experiments proved high efficiency of the sorbents, the ranging recovery rates from 88% to 96% and the LOD values from 0.2 for phenol, and 1.0 for o-chlorophenol.
Basic characteristics of the sorbents synthesized were determined by the use of elemental analysis and UV-VIS spectroscopy.