title: Evaluation of phenylene-bridged periodic mesoporous organosilica as a stationary phase for solid phase extraction.
abstract: A periodic mesoporous organosilica, in particular, a phenylene-bridged material (Ph-PMO), was evaluated for the first time as a sorbent for retaining and eluting fenuron, simazine, atrazine, carbaryl and terbutryn in grape must by solid phase extraction (SPE) prior to their determination with capillary electrophoresis coupled with ultraviolet detection (CE-UV). The analytes were used as model compounds to demonstrate the potential of Ph-PMO for increasing the sensitivity of CE. Under optimal conditions, the limits of detection for the analytes ranged from 0.6 to 4 μg/L, and their limits of quantitation from 2 to 10 μg/L. These values were comparable and, in some cases, even better than those obtained with C18 and HLB materials. Ph-PMO was characterized physicochemically by X-ray diffraction analysis, N2 adsorption-desorption measurements and laser diffraction particle sizing. The sorbent afforded the extraction of atrazine, carbaryl and terbutryn from grape must with mean recoveries ranging from 86 to 105%. Therefore, periodic mesoporous organosilicas possess a high potential as SPE materials.
authors.affiliation: Department of Analytical Chemistry, University of Cordoba, Annex C3 Building, Campus of Rabanales, Cordoba, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Carpio
authors.affiliation: Department of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium.
authors.forename: D
authors.initials: D
authors.lastname: Esquivel
authors.affiliation: Department of Analytical Chemistry, University of Cordoba, Annex C3 Building, Campus of Rabanales, Cordoba, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Arce
authors.affiliation: Department of Organic Chemistry, Nanochemistry and Fine Chemistry Research Institute (IUIQFN), Campus of Rabanales, University of Cordoba, Campus de Excelencia Internacional Agroalimentario (CeiA3), Cordoba, Spain.
authors.forename: F J
authors.initials: FJ
authors.lastname: Romero-Salguero
authors.affiliation: Department of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics and Catalysis (COMOC), Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium.
authors.forename: P
authors.initials: P
authors.lastname: Van Der Voort
authors.affiliation: Department of Organic Chemistry, Nanochemistry and Fine Chemistry Research Institute (IUIQFN), Campus of Rabanales, University of Cordoba, Campus de Excelencia Internacional Agroalimentario (CeiA3), Cordoba, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Jiménez-Sanchidrián
authors.affiliation: Department of Analytical Chemistry, University of Cordoba, Annex C3 Building, Campus of Rabanales, Cordoba, Spain. Electronic address: qa1meobj@uco.es.
authors.forename: M
authors.initials: M
authors.lastname: Válcarcel
mesh_terms: D000327:Adsorption; D019075:Electrophoresis, Capillary / Q000379:methods; D006863:Hydrogen-Ion Concentration; D010316:Particle Size; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D012822:Silicon Dioxide
keywords: Capillary electrophoresis; Periodic mesoporous organosilicas; Pesticides; Solid phase extraction