title: A molecularly imprinted polymer for the selective solid-phase extraction of dimethomorph from ginseng samples.
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) (r(2) ≥ 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.
authors: Ginseng and Antler Products Testing Center of the Ministry of Agricultural PRC, Jilin Agricultural University, Changchun, Jilin, China. Electronic address: 18686635314@163.com.
authors: Xuanwei
authors: X
authors: Xu
authors: College of Resources and Environment Science, Jilin Agricultural University, Changchun, Jilin, China.
authors: Shuang
authors: S
authors: Liang
authors: Ginseng and Antler Products Testing Center of the Ministry of Agricultural PRC, Jilin Agricultural University, Changchun, Jilin, China.
authors: Xinxin
authors: X
authors: Meng
authors: Ginseng and Antler Products Testing Center of the Ministry of Agricultural PRC, Jilin Agricultural University, Changchun, Jilin, China.
authors: Min
authors: M
authors: Zhang
authors: Ginseng and Antler Products Testing Center of the Ministry of Agricultural PRC, Jilin Agricultural University, Changchun, Jilin, China.
authors: Ying
authors: Y
authors: Chen
authors: Ginseng and Antler Products Testing Center of the Ministry of Agricultural PRC, Jilin Agricultural University, Changchun, Jilin, China.
authors: Dan
authors: D
authors: Zhao
authors: Ginseng and Antler Products Testing Center of the Ministry of Agricultural PRC, Jilin Agricultural University, Changchun, Jilin, China.
authors: Yueru
authors: Y
authors: Li
mesh_terms: D057230:Limit of Detection; D016014:Linear Models; D054802:Molecular Imprinting / Q000379:methods*; D009025:Morpholines / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D005894:Panax / Q000737:chemistry*; D015203:Reproducibility of Results; D052616:Solid Phase Extraction / Q000379:methods*
chemical_list: D009025:Morpholines; C076154:dimethomorph
keywords: Dimethomorph; Ginseng samples; Molecularly imprinted polymers; Precipitation polymerization; Solid-phase extraction