JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 3
·46984
·
IF 1.901
Xiaojuan Liu,Fengjing Wu,Chaktong Au,Qi Tao,Mingyu Pi,Wenhui Zhang
Molecularly imprinted polymer (MIP) for selective extraction of p -hydroxybenzoic acid ( p -HB) was synthesized by suspension polymerization using p -HB as template, 4-vinyl pyridine as functional monomer and ethylene glycol dimethacrylate as crosslinker. As characterized by scanning electron microscopy, the MIP particles are spherical, with size ranging from 1 to 8 μm. Compared with the non-imprinted polymer (NIP), the MIP shows higher binding capacity toward p -HB: maximum binding capacity for p -HB being 8.07 μmol g −1 over MIP and 3.88 μmol g −1 over NIP. The adsorption of p -HB on MIP follows the Freundlich model and displays pseudo-second-order kinetics. The results of selective and competitive binding experiments confirm that the molecularly imprinted sites have excellent recognition ability toward p -HB. The results reveal that the MIP is a promising adsorbent for selective extraction of p -HB from water samples. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46984.
研究领域:
环境科学
·
分析化学
·
高分子材料
·
污染物去除
·
分子识别
✓ 已验证
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2010
·Vol. 52
·期 4
·615-619
·
IF 2.453
Shenguang Ge,Mei Yan,Xiaoliang Cheng,Congcong Zhang,Jinghua Yu,Peini Zhao,Weiqiang Gao
A simple and convenient on-line molecular imprinted solid-phase extraction flow-injection fluorescence sensor was developed in this study. Florfenicol (FF)-imprinted polymer was prepared by self-assembly with acrylamide (AM) as functional monomer and ethylene glycol dimethacrylate (EGDMA) as cross-linker. The binding characteristics of the imprinted polymer to florfenicol were evaluated by equilibrium binding experiments, and the morphology of the imprinted polymer was studied by scanning electron microscope (SEM). Fluorescence intensity of 3-p-nitrylphenyl-5-(2′-sulfonophenylazo) rhodanine (4NRASP) and bovine serum albumin (BSA) was inhibited by FF. Under optimum conditions the intensity of fluorescence shows a linear relationship with the concentration of FF over the range of 1.2 × 10 −6 to 2.6 × 10 −5 g mL −1 with a regression equation of Δ I = 23.54 + 17.86 c ( c 10 −6 g mL −1 ) ( r = 0.9965, n = 6). The low detection limit of FF was found to be 3.4 × 10 −7 g mL −1 according to 11 parallel determinations for the blank solution. The relative standard deviation for the determination of 2.0 × 10 −6 g mL −1 FF solution was 3.5% ( n = 11). This proposed sensor could be satisfactorily applied to the determination of FF in liver and meat samples.
研究领域:
分析化学
·
药物残留检测
·
食品安全
·
分子识别
·
环境监测
·
兽药代谢
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 12
·11953-11960
·
IF 1.5
Benzhi Liu,Jinlong Yan,Min Wang,Xiangyang Wu
Molecularly imprinted polymers were prepared on the surface of acrylamide-functionalized multi-walled carbon nanotubes by thermal polymerization, which using nonylphenol as template molecule, methacrylic acid as functional monomer and ethyleneglycol dimethacrylate as crosslinking agent. The molecularly imprinted polymers were modified on the surface of glassy carbon electrode to prepare electrochemical sensor. The proposed sensor showed a linear range of 0.1 to 30 μM with a detection limit of 0.02 μM. The sensor exhibited good stability, selectivity and high sensitivity to nonylphenol detection. It was successfully applied to detect nonylphenol in water samples.
研究领域:
分析化学
·
环境监测
·
材料科学
·
电化学
·
传感器技术
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Bo Zhu,Lingyu Zhou,Qi Zhang,Xiaodong Wang,Hongmei Jiang,Aimin Lu
A rigid Pb(II)-imprinted polymers were synthesized by the combination of surface-imprinted method with sol–gel method using (3-mercaptopropyl) trimethoxysilane as a functional monomer, Pb(II) and hexadecyltrimethylammonium bromide as template ions and tetraethoxysilane as cross-linker and were used as adsorbents for the removal of Pb(II). The effect of molar ratio of cross-linker to functional monomer on the morphology and adsorption performance has been evaluated. The effects of pH, initial concentration and adsorption time on the adsorption performance of Pb(II) on both sorbents were investigated. The maximum adsorption capacity calculated from Langmuir isotherm was 68.03 mg g -1 and 17.13 mg g -1 for Pb(II)-IIP and Pb(II)-NIP, respectively. Kinetics studies showed that the adsorption process obeyed the pseudo-second-order kinetic model. The selective adsorption coefficient of Pb(II)-IIP for Pb(II)/Ni(II), Pb(II)/Cd(II), Pb(II)/Hg(II) and Pb(II)/Co(II) are 117.5, 1.42, 4.9 and 30.24, respectively. The spent Pb(II)-IIP could be reused at least five cycles, demonstrating its good practicability.
研究领域:
环境化学
·
材料科学
·
分析化学
·
环境污染治理
·
功能高分子材料
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2015
·Vol. 9
·期 7
·2026-2035
·
IF 1.956
Du Jiaojiao,Gao Ruixia,Mu Hui
Phthalates represent a potential risk for humans, since they are ubiquitous environmental contaminants. Efficient extraction and purification procedures are demanded for the detection of low concentration levels of phthalates. In this work, a novel type of molecularly imprinted polymers coated onto the surface of vinyl functionalized multi-walled carbon nanotubes was synthesized and coupled with gas chromatography–mass spectrometry (GC/MS) for the selective separation and determination of dioctyl phthalate (DOP) in beverage samples. The morphology, structure property, and thermostability of the resultant polymers were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The adsorption properties of the prepared polymers were investigated by equilibrium rebinding and competitive experiments. The resultant imprinted nanomaterials exhibited high capacity and favorable selectivity. In addition, the feasibility of the developed method using the obtained imprinted polymers as a solid-phase sorbent coupled with GC/MS for the selective isolation and determination of DOP in different beverage samples was demonstrated. Under optimal conditions, the limit of detection of the proposed method for DOP was 2.3 ng L −1 . DOP spiked at three levels of concentration in beverage samples was extracted and determined through the application of the present method, with recoveries ranging from 88.6 to 93.0 % with relative standard deviations less than 5.6 %.
研究领域:
分析化学
·
环境毒理学
·
食品安全
·
分子识别
·
材料科学
·
色谱分析
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）