JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2017
·
IF 2.603
Yun Fa,Yinghui Liu,Aihua Xu,Yuexue Yu,Fangfang Li,Huizhou Liu
An effective pretreatment method for wine color removal by a PS-DVB SPE cartridge and online alcohol elimination by valve switching was presented. The optimum parameters for color removal were investigated: 40-μm and 100 Å poly (styrene)-divinylbenzene (PS-DVB) (0.4 g) was selected as the color removal material and 5 mL of ethanol (10%) as the elution solvent for sample pretreatment under given condition. Moreover, an accurate and automated two-dimensional ion chromatography method for the simultaneous detection of amino acids and sugars was achieved with two valves after injection without alcohol interference. The method had a mean correlation coefficient of >0.99 and a repeatability of 0.92%–4.30% for eight replicates. The mean recovery of six red wine samples were 97.6%, 96.6%, 96.1%, 95.9%, 97.3% and 96.4% respectively. And this method successfully analyzed the amino acid and sugar contents of six wine samples of different origins.
研究领域:
分析化学
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食品科学
·
色谱学
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DOI
PubMed
高影响因子
ANALYST
·
2026
·
IF 3.6
Jiannan Jia,Hongjian Chen,Songle Wang,Yunpeng Wang,Qike Wang,Dong Chen,Shisheng Ling,Zhenzhen Ge,Wenkun Dong,Mi Yan,Zhiyu Wang,Xianping Fan,Xu Liang,Qiang Xu,Xvsheng Qiao
Eu-complex-swollen polystyrene (PS) fluorescent microspheres have attracted considerable attention in the field of lateral flow immunoassay (LFIA) bio-detection. However, the excessive swelling and induced concentration quenching effect of Eu complexes often deteriorate their fluorescence intensity and fluorescence efficiency. To address this issue, herein, we synthesized Eu(TTA)3(TPPO)2 and introduced divinylbenzene (DVB) to fabricate three-dimensionally cross-linked PS-DVB-Eu microspheres in order to obtain a moderate swelling capacity of the Eu complexes without obvious fluorescence concentration quench. This cross-linked structure effectively promotes the homogeneous distribution of swollen Eu(TTA)3(TPPO)2 in PS-DVB-Eu microspheres. This thus resulted in improved fluorescence properties with a high internal quantum efficiency (IQE) of 52.36% and a lifetime of 539 μs. The fluorescence of the cross-linked PS-DVB-Eu microspheres was 3.85 times stronger than that of the non-crosslinked PS-Eu microspheres. The cross-linked structures also helped the PS-DVB-Eu microspheres maintain a relatively high zeta potential and a large surface carboxyl concentration. These merits support PS-DVB-Eu microspheres in obtaining an enhanced lateral flow immunoassay (LFIA) performance, including an LOD of 0.08 ng mL−1 and a CV value of less than 7.34% on detecting C-reactive protein (CRP). This demonstrates that cross-linked PS-DVB-Eu microspheres are promising materials for high performance LFIA point-of-care testing techniques.
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 29
·e52647
·
IF 3.057
Jinrong Yin,Yunlei Gong,Huaan Zheng,Hui Yuan,Zhen Zeng,Wei Qin,Chenghao Li,Yang Zhou,Xianyan Ren
Ultra-low-density proppants are of great significant in slick water fracturing system, but the polymer composite microspheres can hardly promise the quality of oil and gas due to their poor hydrophobicity. To address the issue, we prepared several types of modified styrene-divinyl benzene copolymer microspheres (MSDBs) with long-term durable hydrophobicity and high strength, including O-MSDBs (hydrophobic MSDBs), LO-MSDBs (long-time hydrophobic MSDBs), and CO-MSDBs (coated O-MSDBs) on the basis of a molecular structure of “KH570-styrene (St)-divinyl benzene (DVB)” copolymer. In this article, the design concept and the structure of MSDBs was clarified, and performances of MSDBs are systematically discussed and compared with commercially available hydrophobic microspheres. The O-MSDBs, a kind of nanoparticle patterned St-DVB copolymer microspheres, were prepared by a one-step suspension polymerization undergoing a sol–gel process, showing strong hydrophobicity with a water contact angle up to 140.7°, but short durability in strong hydrochloric acid or hydrofluoric acid; On the contrary, LO-MSDBs perform better in the stability and durability of hydrophobicity with a slightly lower water contact angle about 135.9°. The LO-MSDBs were designed by coating functionalized St-DVB copolymer microspheres with fluororesin. Similarly, CO-MSDBs from fluororesin-coated O-MSDBs were designed. As expected, CO-MSDBs have a stronger hydrophobicity (139.0°) than LO-MSDBs and longer durability than O-MSDBs. Moreover, the MSDBs exhibit better properties than the commercially available hydrophobic polymer and ceramic microspheres.
研究领域:
材料科学
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石油工程
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DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-12
·
IF 5.3
Li Weixia,Lei Jiacheng,He Tiancheng,Gan Yaping,Zhu Yan
A novel Zr-based metal–organic framework (MOF) functionalized with graphene oxide-coated allylmethacrylate-divinylbenzene microspheres (AMA/DVB@GO), termed AMA/DVB@GO@UiO-66-NH 2 was designed. The composite exhibits great adsorption capacity and selectivity for bisphenols (BPs), driven by synergistic interactions, including hydrophobic, π-π, and hydrogen bonding. We optimized conditions to establish an efficient dispersive micro-solid phase extraction procedure coupled with high-performance liquid chromatography (d-μSPE-HPLC) for extracting BPs from milk samples, using the AMA/DVB@GO@UiO-66-NH 2 composite. The method achieved recoveries ranging from 84.0 to 106.6%, with relative standard deviations below 6.9% and detection limits between 0.17 and 0.67 μg/L. This study introduced a novel, hydrophilic, and stable AMA/DVB@GO@UiO-66-NH 2 composite, offering a promising material for the selective enrichment and detection of BPs in food analysis. Graphical
研究领域:
食品科学
·
分析化学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2011
·
IF 2.13
Xiao-Jie Song,Jun Hu,Chang-Chun Wang
Poly(St/DVB/GMA) nanospheres (PNs) were prepared by soap-free emulsion polymerization and the surfaces of the PNs were further functionalized by the thiol-epoxy “click-chemistry” of surface pendant epoxy groups with functional thiols. A variety of functional groups were successfully grafted to the PNs surfaces at high densities as exemplified by the reactions with 2-aminoethanethiol, thioglycolic acid, and 2-mercaptoethanol. All the reactions were easily controlled and the modified polymer nanospheres were well-dispersed in water. Very high surface charges were observed for the 2-aminoethanethiol and thioglycolic acid modified PNs in water, a manifestation of the high surface grafting densities of the ionizable groups. The adsorptions of acid orange and toluidine blue to, respectively, the 2-aminoethanethiol and thioglycolic acid functionalized PNs were examined, which fitted well to the Langmuir isotherm model. For the 2-aminoethanethiol modified PNs, the surface amino group density was found to be 1.1 mequiv/g, with an adsorption capacity of 398 mg/g of acid orange; while the thioglycolic acid modified PNs displayed 1.4 mequiv/g carboxylate groups and an adsorption capacity of 416 mg/g for toluidine blue. The new synthetic method appears to be general in scope and adaptive to a variety of surface functionalities and potential applications.
研究领域:
材料科学
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化学工程
·
环境科学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jiaxi Wen,Kehan Zhang,Yujun Liu,Zhifeng Du,Chaomei Xiong,Hongliang Jiang
Estrogens and their analogues can cause harm to human health through the food chain. Ten estrogens in different milk samples were directly extracted by amphiphilic divinylbenzene/ N -vinyl-2-pyrrolidone (DVB/NVP)-Fe 3 O 4 @SiO 2 -based magnetic solid-phase extraction (MSPE) followed by pre-column derivatization and ultra-high performance liquid chromatography tandem mass-spectrometry (UHPLC-MS/MS) detection. Under the optimal conditions, the limits of detection for ten analytes were in the range of 0.05–0.38 ng mL −1 in whole liquid milk matrix and 0.04–3.00 ng g −1 in milk powder matrix. The intra-/inter-day accuracy ranged in 83.4–113.8%, with RSDs in 2.5–15.0%. A total of 15 brands of liquid milk and milk powder samples were analyzed, and only estradiol was detected in three brands of boxed liquid milk within safe range. The proposed sample pretreatment eliminated the common protein precipitation process, improved the sample throughput, and has the potential for routine testing of estrogens and their analogues in market-sale milk samples.
研究领域:
分析化学
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食品安全
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环境科学
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产品关联
DOI
PubMed
高影响因子
Food Analytical Methods
·
2026
·Vol. 19
·期 1
·60
·
IF 3
Hussain Aisha,Wu Jiapeng,Wen Jiaxi,Xiong Chaomei
Sudan dyes, a class of azo dyes, are genotoxic and carcinogenic to humans. However, they are still used illegally to color food products and spices due to their color fastness. In this study, multi-functionalized magnetic silica nanoparticles (C 18 /DVB/NVP(4:1)-Fe 3 O 4 @SiO 2 MNPs) were synthesized, and solid–liquid extraction (SLE) coupled with magnetic solid phase extraction (MSPE) was employed for the extraction and preconcentration of five Sudan dyes (Sudan I − IV, Sudan Red 7B), followed by high-performance liquid chromatography/ultraviolet spectroscopy (HPLC–UV) for their detection in powdered chili pepper samples. The SLE conditions for the analytes in powdered chili pepper samples were optimized. Under optimal conditions, the extraction recovery ranged between 78.0% and 106.9%. We investigated and optimized the potential factors that may affect the efficiency of MSPE. Under these optimal conditions, calibration curves showed good linearity ( R 2 > 0.9989) across the tested concentration range of 0.98 to 125 µg/g. The limits of detection for the five Sudan dyes were in the range of 0.06–0.26 µg/g. The intra-day and inter-day accuracy ranged from 93.5% to 106.3% with a relative standard deviation (RSD) of not more than 9.1%. The developed method was successfully applied to analyze ten different commercial brands of powdered chili pepper samples purchased from markets in Wuhan, confirming its feasibility for routine analysis of illegal Sudan dyes in these samples.
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产品关联
DOI
高影响因子
THERMOCHIMICA ACTA
·
2017
·
IF 2.236
Xia Gao,Tianbo Zhao,Guan Luo,Baohui Zheng,Hui Huang,Xue Han,Yuqiao Chai
A facile method was developed for encapsulating paraffin wax with St-DVB-SiO 2 organic−inorganic hybrid shells through the combination of suspension emulsion polymerization and hydrolysis and condensation reaction. In this work, the influence of TEOS/MPS mass ratios on the morphology, particle size distribution (PSD), content of core materials, latent heat storage capacity, thermal conductivity and stability of these microcapsules has been studied. SEM and PSD analysis showed that the fabricated microcapsules had a bowl-like shape with concaves on the shell. Moreover, SEM and TGA results jointly illustrated that the higher amount of MPS incorporated into the experimental process, the more SiO 2 particles bonded on the shell of microcapsules. DSC measurements revealed that the microcapsules had a melting temperature range of 44.36–55.03 °C and latent heat storage capacities of 38.90–95.67 J/g. It was suggested that microencapsulated paraffin wax with St-DVB-SiO 2 hybrid shells has been synthesized successfully.
研究领域:
材料科学
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化学工程
·
热能存储
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产品关联
DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2022
·
IF 4.514
Qianrui Xu,Pengcheng Gao,Yang Wang,Wenjie Jiang,Zhifei Wang,Yong Jiang,Zhen Jiao
Porous nanospheres have potential applications in reactions, catalysis and water treatment because of their high surface area, low density and high loading capacity. In this work, a reproducible and well-controlled way to fabricate hollow Polystyrene/Poly(divinylbenzene-co-methacrylic acid)@Fe 3 O 4 /Tannic acid@Ag (PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag) nanocomposites with high catalytic efficiency is developed. Firstly, hollow Polystyrene/Poly(divinylbenzene-co-methacrylic acid) (PS/P(DVB-co-MAA)) nanospheres with an open hole on the surface are produced by supercritical carbon dioxide (scCO 2 ) rapid depressurization methodology. The consequence shows that structure of polymer nanospheres is controllable by altering the reactive conditions, like temperature, pressure, solvent ratio, degree of cross-linking and time. Secondly, the magnetic Fe 3 O 4 and Ag nanoparticles are deposited onto the surface of hollow PS/P(DVB-co-MAA) nanospheres. The result indicates that hollow PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag nanocomposites are highly efficient in degrading dyes, displaying that the apparent rate coefficients of methylene blue (MB), rhodamine B (RhB) and 4-nitrophenol (4-NP) reduction are .0090 s −1 , 0.0239 s −1 , and 0.0073 s −1 , respectively. Besides, hollow PS/P(DVB-co-MAA)@Fe 3 O 4 /TA@Ag nanocomposites can be recycled at least seven times and show no significant loss in catalytic performance.
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 42
·25402-25407
·
IF 3.119
Xiaodong Lv,Peng Gao
Based on the electron-transfer mechanism between the template and quantum dots (QDs), an optical sensor was structured. It is a phenol sensor, which has the room-temperature phosphorescence (RTP) property of Mn-doped ZnS QDs and high selectivity of molecular imprinted polymers (MIPs). On the surface of the silane modified Mn-doped ZnS QDs, the phenol sensor was prepared by double cross-linker precipitation polymerization in the absence of any stabilizer and additive. Double cross-linkers, divinylbenzene (DVB) and ethyleneglycol dimethacrylate (EGDMA), make a great contribution to the imprinted polymerization with hydrogen-bonding interaction. Then, as a result of the functional monomer, methacrylic acid (MAA), a carboxylic acid was grafted onto the surface of ZnS QDs:Mn@MIPs. Under optimal conditions, the phenol determination experiment had a linear range of 5.0 to 55 μmol L−1 with a correlation coefficient of 0.9984, and a high imprinting factor (IF) of 3.43. In addition, the prepared ZnS QDs:Mn@MIPs were successfully used to detect phenol in real water samples. Therefore, this work provided a highly selective and sensitive RTP probe for phenol determination.
研究领域:
分析化学
·
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Yanyan Wang,Liuqian Bao,Jiajing Sun,Yuanyuan Ding,Jiasheng Shi,Zhengyu Duan,Zhiyong Chen
Fluorous affinity chromatography has received growing attention in separation and purification of fluoro compounds, but the wettability of the fluorinated stationary phases is seldom noticed. Here, we construct a series of micro-sized fluorine-containing microspheres by solvothermal precipitation polymerization. The fluorinated microspheres could be obtained with narrow size distribution at even high monomer loading of 15 wt%. Through alternating fluoro monomer, both the particle size and the wettability of the microsphere array could be tuned. Among them, the poly(divinylbenzene -dodecafluoroheptyl methacrylate), P(DVB-DFHMA), microsphere (6.1 μm) arrays displays superhydrophobicity with 153.2° water contact angle. The P(DVB-DFHMA) fluorinated microspheres (7.58% fluorine content) can be packed into steel-less columns as stationary phase for high-performance liquid chromatography. The retention mechanism of the fluorinated column is proven to be the specific fluorine-fluorine interaction. Compared to the commercial C18 silica column, the fluorinated column can completely separate fluorine-containing compounds under high water content mobile phase, including small fluoro molecules and fluoro macromolecules, at much lower back pressure by fluorous affinity.
研究领域:
化学
·
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Yufeng Shen,Huiliang Geng,Feifang Zhang,Zongying Li,Bingcheng Yang
A polyethyleneimine (PEI)-functionalized polymer substrate polar stationary phase was prepared for hydrophilic interaction chromatography (HILIC) by grafting PEI onto poly(styrene-divinylbenzene) (PS-DVB) microspheres. The phase shows a U-shape retention profile and it exhibits typical hydrophilic characteristic when the organic solvent fraction in the mobile phase is > 60%. Hydrogen bonding, anion exchange, and hydrophobic interaction are involved in the retention mechanism. Good separation and unique selectivity for acidic, basic and neutral polar analytes were achieved. It showed extremely low column bleed (comparable to that of blank) under gradient elution mode (even to 50% fraction of water) and wide pH tollerance range (at least 1–13).
研究领域:
分析化学
·
色谱学
·
材料科学
✓ 已验证
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）