title: Highly selective coextraction of rhodamine B and dibenzyl phthalate based on high-density dual-template imprinted shells on silica microparticles.
abstract: A simple one-pot approach based on molecularly imprinted polymer shells dispersed on the surface of silica for simultaneous determination of rhodamine B and dibenzyl phthalate (DBzP) has been developed. Highly dense molecularly imprinted polymer shells were formed in the mixture of acetonitrile and toluene by the copolymerization of methacrylic acid and ethylene glycol dimethacrylate, as well as two templates, rhodamine B and dibenzyl phthalate, directed by the vinyl end groups functional monolayer at surface silica microspheres after 3-methacryloxypropyl trimethoxysilane modification. The obtained imprinted polymer shells showed large average pore diameter (102.5 nm) and about 100 nm shell thickness. The imprinted particles also showed high imprinting factor (αRhB= 3.52 and αDBzP= 3.94), rapid binding kinetics, and excellent selective affinity capacity for rhodamine B and dibenzyl phthalate containing another three competitors in mixed solution. Moreover, the imprinted particles coupled with ultra high performance liquid chromatography was successfully applied to simultaneous analysis of rhodamine B and dibenzyl phthalate in two spiked beverage samples with average recoveries in the range of 88.0-93.0% for rhodamine B and 84.0-92.0% for dibenzyl phthalate with the relative standard deviation lower than 5.1%.
authors.affiliation: Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi, P.R. China.|School of Chinese Pharmacy, Xinjiang Medical University, Urumqi, P.R. China.
authors.forename: Zerong
authors.initials: Z
authors.lastname: Long
authors.affiliation: Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi, P.R. China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Xu
authors.affiliation: Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi, P.R. China.|School of Chinese Pharmacy, Xinjiang Medical University, Urumqi, P.R. China.
authors.forename: Yumei
authors.initials: Y
authors.lastname: Peng
authors.affiliation: Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi, P.R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute, Urumqi, P.R. China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Luo
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou, 730000, P.R. China.
authors.forename: Hongdeng
authors.initials: H
authors.lastname: Qiu
mesh_terms: D001628:Beverages / Q000032:analysis*; D005504:Food Analysis / Q000379:methods*; D054802:Molecular Imprinting; D010795:Phthalic Acids / Q000302:isolation & purification*; D011108:Polymers / Q000737:chemistry; D012235:Rhodamines / Q000302:isolation & purification*; D012822:Silicon Dioxide / Q000737:chemistry*; D052616:Solid Phase Extraction
chemical_list: D010795:Phthalic Acids; D011108:Polymers; D012235:Rhodamines; C032279:phthalic acid; D012822:Silicon Dioxide; C029773:rhodamine B
keywords: dibenzyl phthalate; dual-template imprinted shells; molecularly imprinted polymers; rhodamine B; simultaneous extraction