title: Study of molecularly imprinted solid-phase extraction of gonyautoxins 2,3 in the cultured dinoflagellate Alexandrium tamarense by high-performance liquid chromatography with fluorescence detection.
abstract: A highly selective sample cleanup procedure combined with molecularly imprinted solid-phase extraction (MISPE) was developed for the isolation of gonyautoxins 2,3 (GTX2,3) from Alexandrium tamarense sample. The molecularly imprinted polymer microspheres (MIPMs) were prepared by suspension polymerization using caffeine as the dummy template molecule, methacrylic acid as the functional monomer, ethylene glycol dimethacrylate as the cross-linker and polyvinyl alcohol as the dispersive reagent. The polymer microspheres were used as a selective sorbent for the solid-phase extraction of gonyautoxins 2,3. An off-line MISPE method followed by high-performance liquid chromatography (HPLC) with fluorescence detection for the analysis of gonyautoxins 2,3 was established. Finally, the extract samples from Alexandrium tamarense were analyzed. The results showed the imprinted polymer microspheres exhibited high affinity and selectivity for gonyautoxins 2,3. The interference matrix in the extract were obviously cleaned by MISPE and the extraction efficiency of gonyautoxins 2,3 in the sample ranged from 81.74% to 85.86%.
authors: Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, PR China.
authors: Zi-Ru
authors: ZR
authors: Lian
authors: Jiang-Tao
authors: JT
authors: Wang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004141:Dinoflagellida / Q000502:physiology*; D005453:Fluorescence; D054802:Molecular Imprinting; D012530:Saxitoxin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D052616:Solid Phase Extraction / Q000379:methods*
chemical_list: D012530:Saxitoxin; C013007:gonyautoxins
keywords: Alexandrium tamarense; Gonyautoxins 2,3; Molecularly imprinted polymer microspheres; Solid-phase extraction; Suspension polymerization