FOOD CHEMISTRY
·
2024
·
IF 8.5
Hui-Ping Yu,Qian-Qian Xu,Xin Wang,Yuan-Yuan Cui,He-Fang Wang,Cheng-Xiong Yang
In this work, a novel fluorinated magnetic microporous organic network (Fe 3 O 4 @FMON) was exquisitely designed and synthesized for highly efficient and selective magnetic solid phase extraction (MSPE) of fluorinated benzoylurea insecticides (BUs) from complex tea beverage samples. The Fe 3 O 4 @FMON exhibited good extraction for BUs via the pre-designed hydrophobic, π-π stacking, hydrogen bonding and specific F F interactions. A sensitive Fe 3 O 4 @FMON-based MSPE-HPLC-UV method with wide linear range (0.10–1000 μg L −1 , R 2 ≥ 0.996), low limits of detection (0.01–0.02 μg L −1 ), and large enrichment factors (85.6–98.0) for BUs from tea beverage samples was developed. By decorating F elements within MON's networks, the Fe 3 O 4 @FMON characterized good hydrophobicity and chemical stability, which could be reused at least 8 times without decrease of recoveries. This work demonstrated the great prospects of Fe 3 O 4 @FMON for enriching trace BUs from complex substrates and triggered the potential of FMON for sample pretreatment of fluorinated analytes.
研究领域:
分析化学
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环境科学
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材料科学
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食品科学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Pengzhao Han,Kai Hu,Yuanpeng Wang,Lixin Li,Pan Wang,Weixia Zhu,Haiyan Gong,Zhenqiang Zhang,Shusheng Zhang
In this work, Friedel-Crafts alkylation was successfully applied to prepare a magnetic ionic liquid hypercrosslinked polymer composite (Fe 3 O 4 @IL-HCP), which was subsequently employed as magnetic solid-phase extraction (MSPE) adsorbent for the isolation and enrichment of trace non-steroidal anti-inflammatory drugs (NSAIDs). The developed composite was comprehensively characterized using various techniques, with the results indicating that it possessed high saturation magnetization (39.44 em g − 1 ), large specific surface area (175 m 2 g − 1 ), and high adsorption capacity for NSAIDs. The adsorption behavior and mechanisms were also investigated in detail. NSAIDs were adsorbed onto the Fe 3 O 4 @IL-HCP sorbent via a heterogeneous multilayer process consisting of hydrogen bonding and π-π and electrostatic interactions. Additionally, the composite's large surface area and multiple active sites enabled extraction equilibrium within 6 min. By coupling with high performance liquid chromatography (HPLC), the developed MSPE/HPLC method was applied for the determination of selected NSAIDs in water and urine samples. The developed method displayed wide linear ranges, low limits of detection (0.12–0.30 ng mL −1 and 0.15–1.5 ng mL −1 in water and urine samples, respectively), sufficient recoveries (92.8–109%), and good precision (relative standard deviations ≤ 4.6%). Thus, the findings of this work provide an appealing alternative for the extraction and determination of trace NSAIDs in environmental water and biological samples.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Yangkun Sun,Shengli Ruan,Yuanyuan Zhou,Linhao Zhao,Wenjing Xiong,Chuhui Lin,Jingjing Kuang,Fanghong Ning,Min Zhang,Hongyang Zhang,Ping Hu
In this paper, we designed and manufactured a reliable magnetic solid phase extraction (MSPE) microfluidic chip for determination of polycyclic aromatic hydrocarbons (PAHs) in water combined with gas chromatography-mass spectrometry. Sample loading, washing and elution are implemented with microinjection pump and integrated on a single chip, which reduced manual operation. Magnets were used to fix octadecyl/phenyl bifunctional Fe 3 O 4 @SiO 2 extractant to avoid the design of weir structure in extraction chamber. The whole microfluidic chip was simple and low cost. Based on the microfluidic chip extraction platform, the on-chip MSPE method for the determination of PAHs was optimized and established. The results showed that this method required only 2 mL of sample, 2 mg of extractant, and 50 μL of elution organic solvent for whole on-chip MSPE process, which was environmentally friendly and consistent with green chemistry. Method verification results were displayed which the linear range of five PAHs was between 1-100 ng/mL with good linearity (R 2 ≥ 0.9985), and the detection limits (S/N = 3) were 0.08–0.26 ng/mL. The RSDs of intra-day precision (n=6) and inter-day precision (n=9) for PAHs were less than 6.1 % and 7.2 %, respectively. Enrichment factors were determined to be 31.3–37.7. The recoveries of river water, tap water, bottle water, waste water and urine at three spiked levels were in the range of 89.9% to 113.7% and the matrix effect values were between 83.8% to 109.6%. The extraction platform has the advantages of accurate analysis, simple design and cost-effective, which is conducive to the widespread use of microfluidic chips
研究领域:
分析化学
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环境科学
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微流控技术
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色谱法
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质谱法
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DOI
PubMed
高影响因子
Analytical Methods
·
2019
·Vol. 12
·期 4
·507-513
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IF 2.378
Yinpeng Yang,Yuan Sun,Hang Chen,Xueping Dang,Youhong Ai,Xiaolan Liu,Huaixia Chen
Novel mesoporous yolk–shell structure magnetic molecularly imprinted polymers (MYS-MMIPs) were synthesized via surface polymerization using E2 as a template followed by chemical selective etching to remove the inorganic silica interlayer for the rapid, selective extraction and sensitive detection of 17β-estradiol (E2) in milk powder. For MYS-MMIPs, transmission electron microscopy coupled with N2 adsorption experiments confirmed the successful formation of a mesoporous yolk–shell structure. Furthermore, the thermogravimetric and recycling experiments showed the good thermal and adsorption stability of MYS-MMIPs, the magnetic properties experiment confirmed their good magnetic response, and the binding experiment indicated their selective recognition and high binding capacity (39.24 mg g−1) for E2. The obtained polymers were applied as adsorbents for the magnetic solid phase extraction (MSPE) of E2. After optimizing the MSPE conditions, an MSPE-HPLC method was developed for the determination of E2 in milk powder. The linear range was 1–300 μg kg−1 with a limit of detection of 0.33 μg kg−1. The satisfactory recoveries ranged from 88.3–102.4% and the relative standard deviations (RSDs) were lower than 5.5%. Thus, the MSPE-HPLC method has high accuracy and sensitivity for the analysis of E2 in milk samples.
研究领域:
分析化学
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材料科学
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环境科学
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食品科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xue Ma,Mengmeng Fu,Kai Hu,Li Gao,Chenchen Song,Shusheng Zhang,Renyong Zhao,Wenjie Zhao
Developing efficient and reliable adsorbents with simplified synthesis and mixed-mode performance is crucial for the accurate quantitative analysis of diverse coexisting environmental pollutants. A magnetic carboxylated hypercrosslinked organic polymer (Fe 3 O 4 /HCP-COOH) with reverse phase/cation exchange mixed-mode performance was synthesized through a two-stage process: (1) Fabrication of HCP-COOH via FeCl 3 -catalyzed Friedel-Crafts alkylation using 1,4-phenylenediacetic acid and 1,4-bis(chloromethyl)benzene; (2) In situ growth of Fe 3 O 4 nanoparticles on HCP-COOH through coprecipitation, utilizing FeCl₃ dually as polymerization catalyst and iron precursor to enhance process efficiency and waste minimization. The nanocomposite functioned as a mixed-mode sorbent for magnetic solid-phase extraction (MSPE), integrating dual retention mechanisms to selectively extract hydrophobic polycyclic aromatic hydrocarbons (PAHs) and cationic quaternary ammonium pesticides (QUATs), with subsequent analysis by GC-MS for PAHs and HPLC-MS/MS for QUATs respectively. Following optimization of adsorption pH, eluent composition, and contact time, the method exhibited high sensitivity with limits of detection (LODs) of 0.80-7.93 ng L⁻¹ for 15 PAHs and 0.02-16.31 ng L⁻¹ for 4 QUATs. Validation showed satisfactory recoveries of 89.5-98.3% (RSDs ≤11.2%) in snowmelt and 90.4-101.8% (RSDs ≤11.6%) in lake water (n=3), confirming practicality for simultaneous monitoring of hydrophobic and cationic contaminants in complex environmental water, offering significant advantages in multi-residue analysis for environmental monitoring applications.
研究领域:
环境化学
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分析化学
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材料科学
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污染监测
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可持续合成
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）