Synthesis and Characterization of TiO₂ Modified with Polystyrene and Poly(3-chloro-2-hydroxypropyl Methacrylate) as Adsorbents for the Solid Phase Extraction of Organophosphorus Pesticides

Table 1

Chemical structures and of the organophosphorus pesticides evaluated.

Compound	Structure
Fensulfothion (FST)		2.23
Parathion methyl (MP)		3.0
Coumaphos (CMF)		4.13
Diazinon (DZN)		3.3