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Reference type: Journal
Authors: Fang GZ, Feng JJ, Yan YF, Liu CC, Wang S
Article Title: Highly Selective Determination of Chrysoidine in Foods Through a Surface Molecularly Imprinted Sol-Gel Polymer Solid-Phase Extraction Coupled with HPLC.
Publication date: 2014
Journal: Food Analytical Methods
Volume: 7
Issue: (2)
Page numbers: 345-351.
DOI: 10.1007/s12161-013-9632-6

Abstract: A highly selective determination method for chrysoidine, an industrial azoic dye banned in foods, was developed through a novel molecularly imprinted polymer (MIP) online solid-phase extraction coupled with high-performance liquid chromatography. The MIP was firstly synthesized by a surface molecular imprinting technique in combination with a sol-gel process and characterized by FT-IR and adsorption experiments. The MIP exhibited high selectivity and high adsorption capacity for chrysoidine and offered a fast kinetics for the adsorption and desorption of chrysoidine. A number of parameters, including the pH of loading solution, the sample loading flow rates, and eluting time of analyte, were carefully optimized to improve the extraction efficiency. Under the optimal experimental conditions, for a 50-mL sample solution, the enrichment factor was 279 and the detection limit (S/N = 3) was 6 ng L-1. The linear plots with r 2 > 0.99 were achieved over a range of 0.04-40 μg L-1, and the peak area precision (relative standard deviation) for nine parallel determinations was below 6.32 %. This method was employed for quantitative determination of chrysoidine in oil bean curd, yellow croaker, and paprika with satisfactory recoveries (89.3-97.6 %)
Template and target information: chrysoidine
Author keywords: Chrysoidine, food, molecularly imprinted polymer, Online solid-phase extraction, high-performance liquid chromatography


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