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Abstract: Trace 2,4-dichlorophenol (2,4-DCP) in water was extracted by molecularly imprinted fiber solidphase microextraction and determined by high performance liquid chromatography (HPLC). In the quartz capillary, 2,4-DCP as template molecule, methacrylic acid (MAA) as functional monomer, molecularly imprinted polymer (MIP) fiber was synthesized. The effects of the concentration of template molecule, the proportion of functional monomer and crosslinking agent and the polymerization reaction time on synthesis were investigated. Meanwhile the effect factors on extraction efficiency about the MIP fiber were also optimized, such as extraction time of 2,4-DCP. The highest extraction efficiency for 2,4-DCP in the standard sample solution with the MIP fiber solid phase micro-extraction were obtained (> 80%). After extraction, the sample was used to determine analytes by HPLC with the linear ranging from 10 to 120 μg/L, the detection limit of 2.5 μg/L, and the correlation coefficient (R2) between 0. 9993 and 0. 9995. Then this method was applied to determine 2,4-DCP in tap water, lake water and waste water of industry. The recoveries was found in the range from 91.4% to 106.0% with relative standard deviation ranging from 1.4% to 6.6%.
Template and target information: 2,4-dichlorophenol, 2,4-DCP
Author keywords: molecular imprinting, solid phase micro-extraction, high performance liquid chromatography, 2,4-Dichlorophenol