Journal of Analysis and Testing
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2025
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IF 7
Li Han,Cui Yuanyuan,Zhen Changqing,Lin Xiaohui,Li Ke,Yang Chengxiong
Microporous organic network (MON) has emerged as efficient stationary phases for high-performance liquid chromatographic (HPLC) separation. Nevertheless, the inherent superhydrophobic networks made their applications limited in the reversed-phase (RP) mode. In this work, a novel amino acid L-cysteine (L-Cys) modified core-shelled microsphere MON@SiO 2 -L-Cys was synthesized via the efficient thiol-yne “click” reaction for hydrophilic interaction chromatography /reversed-phase liquid chromatography (HILIC/RPLC) mixed-mode chromatographic separation. Baseline separation of various hydrophilic and hydrophobic compounds including aromatic ketones, phthalate esters, alkylbenzenes, amines, polycyclic aromatic hydrocarbons, phenols, nucleosides, nucleic acid bases, sulfonamides, water-soluble vitamins, cephalosporin antibiotics, and estrogens was realized on MON@SiO 2 -L-Cys packed column based on the predesigned mixed-mode retention mechanisms. The MON@SiO 2 -L-Cys packed column also exhibited higher selectivity compared to bare SiO 2 , MON@SiO 2 without L-Cys, and C 18 packed columns, revealing the synergistic interactions of MON’s networks and the modified L-Cys molecules. This work provided a feasible way to construct a novel amphipathic MON-based stationary phase, broadened the application scope of MON for hydrophilic analytes, and uncovered the prospects of MON in mixed-mode HPLC.
研究领域:
分析化学
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材料科学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
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IF 12.2
Yixin Kuang,Suxin Zhou,Yuefan Liu,Xiaoying Feng,Luyi Chen,Juan Zheng,Gangfeng Ouyang
The size of the adsorbent has the potential to influence extraction performance, but the size effect at the nanoscale is still poorly understood. In this study, organic-inorganic hybrid nanospheres (OIHNs) with controllable nanoscale sizes of 30, 50, and 100 nm were successfully prepared. These materials were further fabricated as solid phase microextraction (SPME) coatings with similar thicknesses, and coupled with gas chromatography-mass spectrometry (GC-MS) to investigate their extraction performance. The results showed that the extraction capacities of OIHNs for chlorobenzenes (CBs) and polycyclic aromatic hydrocarbons (PAHs) were much better than those of their corresponding derived carbon materials, despite the smaller specific surface areas and lower porosities of them. In addition, the enrichment performance increased significantly with decreasing particle size, and the OIHN-30 coating demonstrated the best performance, with enrichment factors ranging from 1098 to 6853 for CBs. Finally, a highly sensitive and practical analytical method was established with a wide linear range of 0.5–5000 ng·L −1 , and the limits of quantification (LOQs) were 0.43–1.7 ng·L −1 . The determinations of ultratrace CBs in five marine water samples and five fresh water samples were realized successfully. This study is expected to contribute to a deep understanding of the environmental effects of nanoparticles and the design of high-performance adsorbents.
研究领域:
环境科学
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分析化学
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PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
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IF 4.5
Peng Cui,Cailan Chen,Lilin Fang,Hanyu Zhang,Peiwen Wu,Kaihao Mo,Ge Niu,Yan Huang,Wenshuai Zhu,Zhichang Liu
Shaping of adsorbents is crucial for their practical implementation in chemical processes, yet often constitutes a synthesis bottleneck. Herein, we report the rapid, one-pot synthesis and direct shaping of a series of novel porous organic polymers based on cyclodextrin (CD) and p-phenylene diisocyanate (PPDI). The porosity of these monolithic materials was further tailored through controlled carbonization at elevated temperatures, yielding hierarchically structured carbons with tunable micro- and mesopores. Their adsorption performance was evaluated towards polycyclic aromatic hydrocarbons (PAHs), key chemical feedstocks and prevalent contaminants in catalytic cracking diesel. The optimized carbon, derived from β-CD-PPDI carbonized at 1000 °C (β-CD-PPDI-1000), exhibits a high BET surface area of 913 m 2 g −1 and demonstrates excellent PAHs uptake capacities (16.55 mg g −1 for naphthalene, 62.04 mg g −1 for anthracene, 12.00 mg g −1 for acenaphthene, and 35.25 mg g −1 for acenaphthylene). The adsorption process was analyzed through kinetic and equilibrium studies, revealing key mechanisms underlying the uptake behavior. These results position the shaped polymers and their derived porous carbons as promising, high-performance adsorbents for diesel purification. The presented strategy of rapid synthesis coupled with direct shaping offers a scalable and efficient pathway for manufacturing practical adsorbents, highlighting significant potential for industrial application in chemical engineering.
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高影响因子
TALANTA
·
2020
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IF 5.339
Zong-Da Du,Yuan-Yuan Cui,Cheng-Xiong Yang
Microporous organic networks (MONs) are a potential class of microporous materials in analytical chemistry . As great efforts have been made in sample pretreatment and gas chromatography, the application of MONs in high performance liquid chromatography (HPLC) has largely lagged and has never been investigated. In addition, directly packing of MONs into columns for HPLC is impractical due to the high column pressure and low column efficiency resulted from the sub-micron sized and irregular MONs. To solve these issues and uncover the possibility of MONs in HPLC, here we report the fabrication of spherical silica amino-functionalized MON (SiO 2 @MON-NH 2 ) composite as a novel stationary phase for HPLC. Neutral, acidic and alkaline probes were evaluated on SiO 2 @MON-NH 2 packed column. A column efficiency of 21,246 plates per meter was obtained for n -propylbenzene. The results revealed the hydrophobic interaction was the main separation mechanism on SiO 2 @MON-NH 2 packed column. Baseline separation of benzenediol , dichlorophenol , chlorophenol and phenylenediamine position isomers, deoxynucleosides and nucleosides was also achieved on SiO 2 @MON-NH 2 packed column. The relative standard deviations of retention time, peak height and peak area for the studied position isomers, deoxynucleosides and nucleosides were 0.2–0.7%, 0.3–3.7% and 1.7–3.5%, respectively. The SiO 2 @MON-NH 2 packed column also offered better resolution for dichlorophenol isomers, deoxynucleosides and nucleosides than SiO 2 –NH 2 and commercial C18 columns. These results revealed the potential of MONs in HPLC and also provided a new way for the use of nano-sized or irregular MONs in HPLC.
研究领域:
分析化学
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材料科学
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色谱学
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PubMed
高影响因子
RSC Advances
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2021
·Vol. 11
·期 22
·13530-13536
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IF 3.361
Yaxiong Zeng,Ming Zhang,Daohui Lin,Kun Yang
Recycling of washing effluent by selective sorption using resins is a feasible method to lower the operation costs of surfactant enhanced remediation (SER). In this study, correlations capable of predicting the selective sorption removal of polycyclic aromatic hydrocarbons (PAHs) by resin SP850 from TX100 solution to recycle washing effluent in SER were developed. A negative relationship of sorption coefficients (log Kf) of PAHs by resin SP850 with TX100 initial concentrations (log C0,TX100) and water solubilities (log Sw) of PAHs was observed, which indicated that solubility enhancement of PAHs in TX100 micelles was responsible for the decreasing of the selective sorption. Freundlich exponential coefficients (1/n) of PAHs were relatively constant (0.775 ± 0.012), suggesting that the sorption of PAHs by SP850 in the presence of surfactant is a surface adsorption process. The modified selectivity parameter (S*), having a relationship with log C0,TX100 and PAHs log Sw as well, could be employed to evaluate the efficiency of the selective sorption process and select the optimal TX100 concentration in washing effluents. For example, at the given SP850 dose of 1.0 g L−1, the optimal TX100 concentrations (CopTX100) for naphthalene, acenaphthene, phenanthrene, pyrene, anthracene and benzanthracene were about 4200, 7100, 8000, 10 000, 18 000 and 19 500 mg L−1, respectively, having a negative relationship with their log Sw. Moreover, the CopTX100 was independent of the solid-to-solution ratio of SP850 and TX100 solution containing PAHs. These correlations would be helpful for the application of SER in contaminated soils by giving a method to quantitatively predict the selective sorption behaviors of PAHs by SP850 from TX100 solution, especially for the CopTX100, using the Sw of organic compounds and surfactant concentrations.
研究领域:
环境科学
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化学工程
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水处理
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Min Sun,Sen Han,Herman Maloko Loussala,Juanjuan Feng,Chunying Li,Xiangping Ji,Jiaqing Feng,Haili Sun
In order to develop an online detection method for polycyclic aromatic hydrocarbons (PAHs) in honey, graphene oxide-functionalized mesoporous silica was prepared and introduced as the coating in the field of in-tube solid-phase microextraction. An extraction tube was coupled to high performance liquid chromatography with diode array detector, and the online analytical system was constructed. After the main extraction and desorption conditions were optimized, a sensitive and online method based on matrix-matched calibration was established towards trace PAHs in honey. The method exhibited wide linear range from 0.8 ng g −1 to 250 ng g −1 and low detection limit of 0.25 ng g −1 , and the enrichment effect reached 2719. The proposed method was validated and successfully applied to the analysis of six honey samples. The extraction tube showed good durability and acceptable chemical stability during the experiment.
研究领域:
分析化学
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食品安全
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高影响因子
MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Chen Yu,Fengshou Wu,Xiaogang Luo,Juan Zhang
A porphyrin-based covalent organic framework (COF) was synthesized via a Schiff base reaction between tetra (4-aminophenyl) porphyrin and 4,4′-biphenyldicarboxaldehyde. The porphyrin-based COF was physically coated on stainless steel for headspace solid-phase microextraction (HS-SPME) of polycyclic aromatic hydrocarbons (PAHs) prior to their determination by gas chromatography-flame ionization detection (GC-FID). Some properties of the prepared fiber like morphology, structure and stability were tested. The effective parameters including extraction temperature, extraction time, NaCl concentration, agitation speed, desorption temperature and desorption time on the performance by HS-SPME were optimized systematically. The study of extraction mechanism revealed the π-π stacking interaction between porphyrin-based COF fiber and PAHs. Under optimum condition of the developed method, a wide linear range (1–150 ng mL −1 ) with high determination coefficient (R 2 > 0.99), low detection limit (0.25 ng mL −1 ) and low quantitation limit (0.5 ng mL −1 ) were obtained. The repeatability (one fiber, n = 3) and the reproducibility (fiber-to-fiber, n = 3) expressed as the relative standard deviations (RSDs) were in the range of 0.27%–1.75% (intra-day), 2.73%–6.69% (inter-day) and 3.34%–8.62% (fiber-to-fiber), respectively. The developed porphyrin-based COF HS-SPME method had been applied for the determination of PAHs in water and soil samples with satisfactory recoveries in the range of 67.87%–98.74%, 41.13%–104.76%, respectively.
研究领域:
分析化学
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环境科学
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高影响因子
JOURNAL OF SEPARATION SCIENCE
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2020
·Vol. 43
·期 18
·3655-3664
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IF 2.878
Herman Maloko Loussala,Sen Han,Juanjuan Feng,Min Sun,Jiaqing Feng,Jing Fan,Meishan Pei
To enhance the extraction performance, a mesoporous silica was modified with ordered mesoporous carbon for solid-phase microextraction. Three stainless-steel wires coated with the mesoporous material were placed in a polyetheretherketone tube for getting an extraction tube. The tube was coupled to high-performance liquid chromatography with diode array detector, and the online analysis system was constructed. Then its extraction performance was evaluated using hydrophobic polycyclic aromatic hydrocarbons, phthalates, and hydrophilic neonicotinoids. The best selectivity was presented for polycyclic aromatic hydrocarbons. Several main conditions were optimized such as sampling volume, sampling rate, methanol concentration in the sample, and desorption time, a rapid and sensitive analytical method was established toward polycyclic aromatic hydrocarbons. The analytical method exhibited wide linear range from 0.017 to 15 µg/L with acceptable correlation coefficients more than 0.9990, limits of detection in 0.005-0.020 µg/L, limits of quantification ranging from 0.017 to 0.066 µg/L as well as large enrichment factors of 377-2314. It was successfully applied to detect trace polycyclic aromatic hydrocarbons in some real water samples including tap water, snow water, and domestic sewage.
研究领域:
分析化学
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环境科学
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PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2020
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IF 4.049
Xiaohuan Zang,Yachao Pang,Hongda Li,Qingyun Chang,Shuaihua Zhang,Chun Wang,Zhi Wang
A covalent organic framework modified graphitic carbon nitride (g-C 3 N 4 @TpBD) was synthesized by modifying the graphitic carbon nitride (g-C 3 N 4 ) with a covalent organic framework (COF-TpBD). The synthesis conditions including the mass ratio between g-C 3 N 4 and benzidine (BD), solvent type, reaction temperature and reaction time were optimized. Under the optimal synthetic conditions, a novel spiny dendritic g-C 3 N 4 @TpBD adsorbent was obtained. The g-C 3 N 4 @TpBD was then coated on stainless-steel wire by sol-gel technique and the coated fiber was used for the solid phase microextraction of polycyclic aromatic hydrocarbons prior to gas chromatography-mass spectrometric detection. The established method was successfully applied to determine eight PAHs in six environmental water samples. Under the optimal extraction conditions, a wide linear quantification range for the analytes was obtained from 0.07 to 60.0 ng mL −1 with the coefficients of determination varying from 0.9979 to 0.9998, and the limits of detection (S/N = 3) ranged from 0.02 to 0.05 ng mL −1 . The relative recoveries of the analytes for the six environmental water samples at the spiked concentrations of 0.2, 0.5, 3.0 and 30.0 ng mL −1 were between 83.6% and 118% with the relative standard deviations ranging from 2.4% to 11.3%.
研究领域:
分析化学
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环境科学
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PubMed
高影响因子
FOOD CHEMISTRY
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2020
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IF 6.306
Wenjin Wang,Shuaihua Zhang,Zhi Li,Jinqiu Li,Xiumin Yang,Chun Wang,Zhi Wang
Honey, a highly nutritious functional food, might be contaminated by polycyclic aromatic hydrocarbons (PAHs) during its production and/or harvest. The preconcentration and analysis of trace levels of PAHs from the complex sample matrices like honey still poses challenges for analytical researchers. In this study, three different covalent triazine-based frameworks (CTFs) were synthesized and explored as the solid-phase microextraction (SPME) coating for the extraction of some PAHs from various honey samples. Among the CTFs, cyanuric chloride- p -quaterphenyl (CC-QP) exhibited the highest extraction capability toward PAHs due to its largest specific surface area and π-electrons system. Under the optimum experimental conditions, the CC-QP based SPME method exhibited wide linearity (0.10–100 ng g −1 ), low limits of detection (0.03–0.19 ng g −1 ) and good reproducibility (relative standard deviations < 9.9%). The new SPME method coupled with chromatography-mass spectrometry detection was successfully applied for the determination of PAHs in honey samples with satisfactory recoveries (82.0–116.8%).
研究领域:
分析化学
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食品科学
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Youan Ji,Yucui Hou,Shuhang Ren,Weize Wu
Indole is an important chemical that can be directly obtained from wash oil mixtures. In this work, several tetraethyl ammonium amino acid (TAAA) ionic liquids (ILs) were designed to separate indole from model wash oil through forming hydrogen bonds. The effects of important factors, such as stirring time, TAAA type, indole concentration, temperature, and TAAA:indole mole ratio, on indole separation were investigated. It is found that these TAAAs can separate indole from model wash oil with separation efficacy up to 98.0% (for tetraethylammonium L-alanine ionic liquid), and the ultimate indole concentration is 1.6 g/dm 3 . This separation process takes less than 5 min. Also, for one kind of TAAA, the ultimate indole concentrations are almost constant despite different initial indole concentrations. The maximum distribution coefficients of indole are 200.9 at the studied conditions. We have also found that water content in TAAA shows a negative effect on indole separation, which inspired us to design a process for TAAA regeneration using water. After regeneration, TAAA can be reused, and the separation efficacy of indole is not significantly reduced. The FT-IR results show that there are hydrogen bonds between TAAAs and indole. Finally, we compared the TAAA method to other methods and demonstrated the advantages.
研究领域:
化学工程
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分析化学
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材料科学
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2019
·Vol. 43
·期 5
·896-904
·
IF 2.516
Yuan Tian,Yuxia Hou,Quan Yu,Xiaohao Wang,Mengkui Tian
In this study, a new covalent organic framework, consisting of tetra(4-aminophenyl)porphyrin and tris(4-formyl phenyl)amine, was layer-by-layer immobilized on stainless-steel wire as a coating for microextraction. The fabrication process was easy and controllable under mild conditions. The as-grown fiber was applied to extract polycyclic aromatic hydrocarbons in aqueous solution via head-space solid-phase microextraction. Furthermore, it was analyzed by gas chromatography with a flame ionization detector. A wide linear range (0.1–50 µg/L), low limits of detection (0.006–0.024 µg/L, signal-to-noise ratio = 3), good repeatability (intra-fiber, n = 6, 3.1–8.50%), and reproducibility (fiber to fiber; n = 3, 5.79–9.98%), expressed as relative standard deviations, demonstrate the applicability of the newly developed coating. This new material was successfully utilized in real sample extraction with a satisfactory result. Potential parameters affecting the extraction efficiency, including extraction temperature and extraction time, salt concentration, agitation speed, sample volume, desorption temperature, and time, were also optimized and discussed.
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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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）