Semi-covalent imprinted polymer using propazine methacrylate as template molecule for the clean-up of triazines in soil and vegetable samples.
A semi-covalent imprinted polymer was prepared by precipitation polymerisation using propazine methacrylate as template molecule, ethylene glycol dimethacrylate as cross-linker and toluene as porogen. After removal of propazine by basic hydrolysis of the covalent bond, the optimum loading, washing and elution conditions for the solid-phase extraction of the selected triazines were established. The binding sites present in the polymeric matrix were characterised by fitting the experimental results of several rebinding studies to the Langmuir-Freundlich isotherm. Subsequently, an analytical methodology based on molecularly imprinted solid-phase extraction (MISPE) was developed for the determination of several triazinic herbicides in soil and vegetable samples. Following this procedure, a good degree of clean-up of the sample extracts was easily achieved, allowing the HPLC-UV determination of selected triazines in complex samples at low concentration levels.
Cacho
C
C
Departamento de Química Analítica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, E-28040 Madrid, Spain.
Turiel
E
E
Martín-Esteban
A
A
Ayala
D
D
Pérez-Conde
C
C
D005506:Food Contamination / Q000032:analysis*; D008689:Methacrylates / Q000737:chemistry*; D011109:Polymethacrylic Acids / Q000737:chemistry*; D012989:Soil Pollutants / Q000302:isolation & purification*; D011198:Solanum tuberosum / Q000737:chemistry; D014227:Triazines / Q000737:chemistry / Q000302:isolation & purification*; D003313:Zea mays / Q000737:chemistry
D008689:Methacrylates; D011109:Polymethacrylic Acids; D012989:Soil Pollutants; D014227:Triazines; C511713:propazine methacrylate; C004919:ethylene dimethacrylate