FOOD CHEMISTRY
·
2025
·
IF 9.8
Juntao Wang,Ruiyang Ma,Yaxing Guo,Fuyuan Zhang,Seid Mahdi Jafari
Accurate monitoring of nitroimidazole antibiotics (NDZs) in environmental and food matrices is critical for safeguarding public health and food safety. In this study, a novel sulfonic acid-functionalized hyper-cross-linked polymer (NDF-TPE-HCP) was synthesized via Friedel-Crafts alkylation reaction. The polymer exhibited unique mixed-mode interactions, which enabled efficient extraction of NDZs. Leveraging its strong ExEf , NDF-TPE-HCP was integrated into a solid-phase extraction system coupled with HPLC for the analysis of NDZs (metronidazole, ronidazole, secnidazole, dimetridazole and ornidazole) in water and fish muscle. The developed method demonstrated a good linearity with NDZs concentrations from 0.07 to 400 ng/g (or ng/mL) with the correlation coefficients ( R 2 ) ≥ 0.9972. Moreover, low limits of detection for the analytes (0.02–5.00 ng/g (or ng/mL)) were achieved. The method recoveries ranged from 85.2 % to 118.0 %, with the relative standard deviation (RSD) ≤ 9.8 %. The NDF-TPE-HCP based method can serve as a robust and sensitive tool for monitoring NDZs residues.
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TALANTA
·
2022
·
IF 6.556
Lin Li,Yingying Li,Sijia Zhang,Ting Wang,Xiaohong Hou
In this study, MIL-101(Cr)/cellulose aerogel/melamine sponge composite was fabricated through a simple soaking method. The composite was packed in the syringe barrel and used as the sorbent for microextraction in packed syringe. Coupled to UPLC-MS/MS, the proposed method was employed for the analysis of trace nitroimidazoles in water samples. The parameters affecting the extraction efficiency, including sorbent type, pH value of sample solution, sample solution volume and elution solvent were optimized. Under the optimal conditions, good linearity (r > 0.99 for five analytes), high sensitivity (limit of detection: 8.250–16.33 ng L −1 ), ideal precision (intra-day precision: 1.1%–5.3%, inter-day precision: 1.8%–6.7%) and satisfactory accuracy (recovery: 70.4%–96.7%) were achieved. The proposed method was proved to be efficient, easily operative and environmentally friendly.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Min Li,Weihua Liu,Xufeng Meng,Shuofeng Li,Qianqian Wang,Yaxing Guo,Yuanyuan Wu,Lin Hao,Xiumin Yang,Zhi Wang,Chun Wang,Qiuhua Wu
In this work, a novel knitting aromatic polymer (KAP) was fabricated for the first time by knitting ferrocene with 1,3,5-tris(bromomethyl)-2,4,6-trimethylbenzene via Friedel-Crafts reaction, and then the KAP was magnetically functionalized with Fe 3 O 4 nanoparticles to produce a magnetic KAP (M-KAP). Combining M-KAP based magnetic solid-phase extraction with high performance liquid chromatography-ultraviolet detection, a simple and sensitive method was developed for simultaneous determination of six benzoylurea insecticides (BUs) in honey and apple juice samples. In the optimized conditions, a good linearity for the BUs existed in the range of 1.67–1000 ng g −1 for honey sample and 0.500–100.0 ng mL −1 for apple juice sample. The limits of detection were 0.500–1.50 ng g −1 and 0.150–0.400 ng mL −1 for honey and apple juice sample, respectively. Satisfactory recoveries were in the range of 85.5–105.5% with RSDs ≤ 8.3%. The developed method demonstrated an excellent practicability for sensitive analysis of the BUs.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2022
·
IF 8.91
Qianqian Wang,Ranxiao Tang,Mingming Xu,Junmin Wang,Shuofeng Li,Weihua Liu,Lin Hao,Shuaihua Zhang,Junhong Zhou,Chun Wang,Qiuhua Wu,Zhi Wang
Organic micropollutants (OMPs) in water resources are a growing threat to aquatic ecosystems and human health. Efficient removal of polar OMPs is very challenging because of their high hydrophility. Synthesizing novel adsorbent capable of high-efficiently removing hydrophilic and hydrophobic micropollutants is highly desirable for water remediation . Here, using natural proanthocyanidin as building units, a novel hydroxyl-functional porous organic framework (denoted as PC-POF) with amphiphilic feature was synthesized through facile azo coupling reaction. Five sulfonamide antibiotics were selected as model OMPs for adsorption study. Adsorption experiments demonstrated a more rapid and efficient sulfonamides capture ability of the PC-POF than that of the most reported adsorbents due to strong hydrogen bonding, π stacking and electrostatic interactions. The PC-POF can be easily recovered and reused at least 5 times without obvious decline in adsorption performance. Moreover, experiments conducted at environmentally relevant concentrations (μg L −1 ) further confirmed a notable adsorption performance of the PC-POF even when the sulfonamides solution was rapidly passed through the PC-POF packed column. The PC-POF also showed good adsorption performance for other micropollutants like neonicotinoid insecticides, nitroimidazole antibiotics and triazine herbicides, indicating a promising prospect. This work provides a new strategy to construct amphiphilic adsorbent by using renewable resources for pollutants removal .
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MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Liyin Bu,Xiaohui Chen,Qingyuan Song,Ding Jiang,Xueling Shan,Wenchang Wang,Zhidong Chen
In this study, a supersensitive electrochemical impedance spectroscopy (EIS) analysis method combined the molecularly imprinted polypyrrole (MIP) which electropolymerized on the composites of zirconium-based metal organic framework (Uio-66) and carbon dots (CDs) modified glassy carbon electrode (GCE) was developed for chloramphenicol (CAP) determination. The integration of Uio-66 and CDs effectively promoted the sensitivity of the proposed MIP senor by improving the surface area and the charge transfer of electrode. By extraction of CAP template, the specific sites were formed on the MIP surface which can rewrap the CAP target molecules. The CAP determination was based on the charge transfer difference (△Rct) before and after the MIP/ [email protected] /GCE rebinding the CAP. The results showed that △Rct responded good linearity to the logarithm of CAP concetration in the range of 0.1 – 100 pmol/L, with a low detection limit of 0.061 pmol/L (S/N = 3), exhibiting high sensitivity and specificity for the determination of CAP.
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WATER RESEARCH
·
2023
·
IF 12.8
Yinqiao Zhang,Yang Guo,Jingyun Fang,Kaiheng Guo,Gang Yu,Yujue Wang
Micropollutant (MP) abatement efficiencies are critical information for optimizing water treatment process for cost-effective operations. Nevertheless, due to the vast number of MPs in real water matrices, it is infeasible to measure their abatement efficiencies individually in practical applications. In this study, a probe compound-based kinetic model was developed for generalized prediction of MP abatement in various water matrices by the ultraviolet (UV)/chlorine process. The results show that by measuring the depletion of three probe compounds (ibuprofen, primidone, and dimetridazole) spiked in the water matrix, the exposures of main reactive chlorine species (RCS including chlorine radicals (Cl•), dichloride radicals ( Cl 2 − • ) and chlorine oxide radicals (ClO•)) and hydroxyl radicals (•OH) during the UV/chlorine process could be calculated using the model. Based on the determined exposures, the abatement efficiencies of various MPs in different water matrices (e.g., surface water, groundwater, and wastewater) could generally be predicted with acceptable accuracy by the model without prior water-specific calibration. In addition, the relative contribution of UV photolysis and oxidation with active chlorine, RCS, and •OH to MP abatement could be quantitatively simulated using the model to clarify the abatement mechanism of MPs during the UV/chlorine process. The probe-based kinetic model can thus offer a useful tool to guide practical water and wastewater treatment for MP abatement and to explore the mechanism of UV/chlorine process.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Chun Wang,Qianqian Wang,Jintao Yu,Xinmeng Wang,Lijuan Wang,Bin Zhao,Lin Hao,Weihua Liu,Zhi Wang,Hao Chen,Qiuhua Wu
White pollution caused by the massive discharges of waste expanded polystyrene (WEPS) has become a critical global issue, so the effective conversion of WEPS is of great significance to reduce white pollution. Herein, adopting WEPS as raw material, three high-value-added hyper-crosslinked polymers (WEPS-HCPs) with high surface areas and abundant micro/mesoporous structures were synthesized via Friedel-Crafts alkylation reaction using dimethoxymethane, dichloroxylene and 4,4′-bis(chloromethyl)-1,1′-biphenyl (BCB) as cross-linker, respectively. The WEPS-HCPs were used as sorbent to extract aflatoxins (AFs) and all the HCPs exhibited high adsorption capacity . For the fast separation and recovery of the sorbent, WEPS-BCB was chosen as a model HCP to be magnetically functionalized to obtain a magnetic HCP (mWEPS-BCB) for the first time. Based on magnetic solid phase extraction with the mWEPS-BCB as sorbent, a fast and sensitive method was developed to determine trace level of AFs in grain food . Under the optimal conditions, the proposed method presented wide linear range (0.008–10.0 ng g −1 ), low detection limit (0.002–0.015 ng g −1 ) and satisfactory precision (relative standard deviation < 7%). Converting WEPS into a high-value-added sorbent not only provided a facile strategy for effective recycling of WEPS, but also developed a sensitive method for accurate determination of AFs in grain food, achieving significant economic and environmental benefits.
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ADVANCED MATERIALS
·
2023
·
IF 29.4
Jun Li,Zhenhai Xia,Xiaowei Wang,Cheng Feng,Qingcheng Zhang,Xi'an Chen,Yun Yang,Shun Wang,Huile Jin
The acidic aqueous supercapacitors have been found to deliver appealing capacitive properties due to fast ion diffusion caused by the applied smallest size of hydrion. However, their practical applications are largely inhibited by the narrow electrochemical stability window of water (1.23 V). Herein, A nitrogen-enriched porous carbon materials (RNOPCs) is reported, consisting of varied nitrogen doping bonded on sp 2 and sp 3 carbon sites, which are capable of stimulating a wider potential window up to 1.4 V and thus resulting in a great enhancement of capacitive performance in aqueous acidic electrolytes. Together with the improved electrical conductivity and preferable hydrion diffusion, RNOPCs exhibit an ultrahigh volumetric capacitance (1084 F cm −3 ) in 0.5 M H 2 SO 4 . Besides, a fully packed RNOPCs-based symmetrical supercapacitor can deliver a high gravimetric and volumetric energy density of 31.8 Wh Kg −1 and 54.3 Wh L −1 respectively, approaching those of lead acid batteries (25–35 Wh Kg −1 ). The first-principles calculations reveal that the lone pair electrons of the doped nitrogen can be delocalized on its neighboring carbon atoms, improving charge uptakes and overpotentials. Such facile and scale-up production of carbon-based supercapacitors can bridge the gap of energy density between traditional supercapacitors and batteries in aqueous electrolytes.
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ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
M.R. Ali,M.S. Bacchu,M. Daizy,C. Tarafder,M.S. Hossain,M.M. Rahman,M.Z.H. Khan
s In this experiment, a highly effective electrochemical sensor based on a molecularly imprinted polymer has been developed for ultrasensitive detection of dimetridazole. The sensor was made by incorporating of dimetridazole as a template molecule during the electropolymerization of poly-arginine on a glassy carbon electrode. The modified electrode GCE/P-Arg@MIP was characterized by voltammetric and microscopic techniques. Differential pulse voltammetry method was used to detect target analyte under the optimum condition. The DPV response to dimetridazole was linear at 0.1 × 10 −9 to 10 × 10 −6 mol L −1 ( R 2 = 0.996), with a method detection limit (S/N = 3) of 0.1 × 10 −9 mol L −1 . Moreover, the proposed sensor shows satisfactory recovery ranges for the determination dimetridazole in commercially available egg, milk and honey samples.
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FOOD CHEMISTRY
·
2020
·
IF 6.306
Qianqian Wang,Weihua Liu,Lin Hao,Chun Wang,Qiuhua Wu,Zhi Wang
A magnetic porous organic framework (M-POF) was rationally designed and served as a sorbent for magnetic solid-phase extraction of six nitroimidazoles from chicken meat prior to their assay by high-performance liquid chromatography with diode array detection. The M-POF exhibited good magnetic responsiveness and outstanding affinity to nitroimidazoles with large adsorption capacity up to 36 mg g −1 . Under optimal conditions, the developed method offered good linearity ( r greater than 0.992) in the range of 1.5–100.0 ng g −1 , low limits of detection (S/N = 3) of 0.5–0.8 ng g −1 , low limits of quantification of 1.5–2.5 ng g −1 and high enrichment factors of 80–175 for the nitroimidazoles. The method was successfully applied to analyze nitroimidazoles in chicken meat. The recoveries were 80.2–118% with relative standard deviations lower than 12%. The adsorption mechanism was further explored and the results showed that the M-POF exhibited adsorption potential for compounds with strong polar interactions.
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Polymers
·
2021
·Vol. 13
·期 13
·2142
·
IF 4.329
Shengjun Wang,Jiaqi Guo,Yibo Ma,Alan X. Wang,Xianming Kong,Qian Yu
The flexible SERS substrate were prepared base on regenerated cellulose fibers, in which the Au nanoparticles were controllably assembled on fiber through electrostatic interaction. The cellulose fiber was regenerated from waste paper through the dry-jet wet spinning method, an eco-friendly and convenient approach by using ionic liquid. The Au NPs could be controllably distributed on the surface of fiber by adjusting the conditions during the process of assembling. Finite-difference time-domain theoretical simulations verified the intense local electromagnetic fields of plasmonic composites. The flexible SERS fibers show excellent SERS sensitivity and adsorption capability. A typical Raman probe molecule, 4-Mercaptobenzoicacid (4-MBA), was used to verify the SERS cellulose fibers, the sensitivity could achieve to 10−9M. The flexible SERS fibers were successfully used for identifying dimetridazole (DMZ) from aqueous solution. Furthermore, the flexible SERS fibers were used for detecting DMZ from the surface of fish by simply swabbing process. It is clear that the fabricated plasmonic composite can be applied for the identifying toxins and chemicals.Keywords:regenerated cellulose fiber;Au NP;controllably assembled;SERS;dimetridazole
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TALANTA
·
2019
·
IF 4.916
Haochi Liu,Jie Ding,Kun Zhang,Lan Ding
A custom-tailored design was proposed for the fabrication of carbon dots coupled with restricted access materials and molecularly imprinted polymers (CDs@RAM-MIPs) to detect metronidazole (MNZ). Biomass carbon dots (CDs) were derived from longan peels assisted with high pressure microwave, and had the merits of eco-friendly, excellent photostability and low toxicity. In this work, glycidyl methacrylate was used as a co-polymeric monomer to increase hydroxyl groups on the surface of synthetic materials, which eliminated the interference of biological macromolecules . The specific binding cavities of CDs@RAM-MIPs were formed after removing the template molecule (MNZ). The obtained CDs@RAM-MIPs can selectively capture MNZ through the specific interaction between recognition sites and MNZ, and obey photoinduced electron transfer fluorescence quenching mechanism. The highly sensitive and selective fluorescent sensor based CDs@RAM-MIPs had a wide linear range (50–1200 ng mL −1 ) and a low detection limit (17.4 ng mL −1 ) for MNZ. It has been utilized to detect MNZ in serum with recoveries of 93.5%–102.7%, and the relative standards (RSDs) were 1.9%–3.6%, respectively. This work provides a thoughtful strategy for preparation and application of CDs@RAM-MIPs, which presages its great potential for detecting trace compounds in real samples.
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