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Reference type: Journal
Authors: Xu XW, Liang S, Meng XX, Zhang M, Chen Y, Zhao D, Li YR
Article Title: A molecularly imprinted polymer for the selective solid-phase extraction of dimethomorph from ginseng samples.
Publication date: 2015
Journal: Journal of Chromatography B
Volume: 988
Page numbers: 182-186.
DOI: 10.1016/j.jchromb.2015.02.033
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1570023215001336

Abstract: A molecularly imprinted polymer (MIP) was synthesized and evaluated to selectively extract dimethomorph from ginseng samples. Dimethomorph molecularly imprinted polymers with template to monomer molar ratios were contrived and developed via precipitation polymerization employing methacrylic acid as functional monomer, ethylene dimethacrylate as cross-linker and butanone:N-heptane (7:3, v:v)as porogen. The LOD (limit of detection) of this method was 0.002 mg kg-1, and the LOQ (limit of quantification) was 0.005 mg kg-1. The different spiked level of ginseng was 0.1 mg kg-1, 1.0 mg kg-1, 5.0 mg kg-1, and the average recovery of dimethomrph was 89.2-91.6%. Under the optimized condition, good linearity was obtained from 0.01 to 5 mg kg-1 (r2 0.9997) with the relative standard deviations of less than 3.20%. This proposed MISPE-GC procedure eliminated the effect of template leakage on quantitative analysis and could be applied to direct determination of dimethomrph in ginseng samples
Template and target information: dimethomorph
Author keywords: Molecularly imprinted polymers, dimethomorph, precipitation polymerization, Solid-phase extraction, Ginseng samples

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