title: A novel molecularly imprinted polymer for simultaneous extraction and determination of sudan dyes by on-line solid phase extraction and high performance liquid chromatography.
abstract: A novel molecularly imprinted polymer was synthesized with attapulgite employed as matrix, which is simple and time-saving. In this method, sudan I was chosen as template molecule, 2-vinylpyridine as functional monomer and ethylene glycol dimethacrylate as cross-linking agent, respectively. The imprinted polymer was characterized by the infrared spectroscopy and transmission electron microscopy. Then the selectivity experiments were performed on sudan dyes and the recognition coefficients for sudan I, sudan II, sudan III and sudan IV were 2.9, 1.9, 1.9 and 2.3, respectively. As the packing material of solid-phase extraction, the imprinted polymer has been applied to on-line concentration of the four sudan dyes in samples from Yellow River water, tomato sauce and sausage. The corresponding analytical methods to determine these sudan dyes have been developed. The limits of detection for these sudan dyes were in the range of 0.01-0.05 ng mL(-1) for Yellow River water, 1.0-3.0 ng g(-1) for tomato sauce and 0.8-3.0 ng g(-1) for sausage.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China.
authors.forename: Chuande
authors.initials: C
authors.lastname: Zhao
authors.forename: Ting
authors.initials: T
authors.lastname: Zhao
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liu
authors.forename: Haixia
authors.initials: H
authors.lastname: Zhang
mesh_terms: D001391:Azo Compounds / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004396:Coloring Agents / Q000032:analysis / Q000302:isolation & purification*; D005504:Food Analysis; D006863:Hydrogen-Ion Concentration; D016014:Linear Models; D054802:Molecular Imprinting / Q000379:methods*; D009284:Naphthols / Q000032:analysis / Q000302:isolation & purification*; D009994:Osmolar Concentration; D045483:Rivers / Q000737:chemistry; D012680:Sensitivity and Specificity; D052616:Solid Phase Extraction / Q000379:methods*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D009284:Naphthols; C024336:1-phenylazo-2-naphthol