JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Kaixing Luo,Yu Luo,Yanjuan Liu,Yuefei Zhang,Wei Chen,Zhengwu Bai,Sheng Tang
s In this work, a new strategy of simultaneously grafting two different functional ligands onto the silica surface was adopted to prepare a carbonyldiimidazolium/dodecyl dual-functionalized silica stationary phase (Sil-CDI-DD) by recycling the discarded commercial C18 columns as the raw materials. A full characterization of the waste silica-C18, the calcined silica, the acidified silica and the new packing materials was done to explore the feasibility of recycling the waste chromatographic columns. Hydrophobic and hydrophilic selectivity of the obtained Sil-CDI-DD was specifically investigated, and retention mechanisms in reversed-phase and hydrophilic interaction chromatography modes were discussed. The experimental results showed that the perfect combination of carbonyldiimidazolium and long-chain alkyl groups commendably enhanced the separation selectivity and efficiency of the versatile Sil-CDI-DD, which could provide multiple interaction sites for diverse target analytes, thereby contributing to the favorable resolution of hydrophilic nucleosides/nucleobases and weak polar environmental endocrine disruptors , including alkylphenols, bisphenols , steroid hormones and phthalates .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 7
·969-975
·
IF 1.967
Zhu Anhong,Kan Xianwen
A novel kind of three-dimensional ordered macroporous molecular imprinted polymer (3DOM MIP) was prepared and studied. Monodisperse silica microspheres were used to form silica crystal template via simple centrifuge. In the presence of template molecule, acrylamide and trimethylolpropane trimethacrylate were co-polymerized in the interstices of crystal template bisphenol A (BPA). Hydrofluoric acid were employed to etch silica crystal and the mixed solvent of methanol with acetic acid were employed to extract template molecule. The results of SEM and FTIR confirmed the successful synthesis of 3DOM MIP. The obtained 3DOM MIP exhibited a rapid adsorption kinetics and a specific adsorption capacities toward template molecule because of the small size of MIP wall, which possessed much more effective imprinted cavies. Meanwhile, 3DOM MIP could selective recognized BPA from its structural analogues. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2022
·
IF 2.267
Caifen Chen,Dan Li,Baokang Jin
A selective, sensitive electrochemical biosensor is reported to determine bisphenol A (2,2-bis(4-hydroxyphenyl) propane, BPA) based on target-induced chain release. A gold electrode was premodified with dendritic gold nanoparticles (AuNPs) by direct electrochemical deposition to increase the active surface area of the electrode to immobilize hydrosulfonyl group-containing capture DNA (C-DNA). C-DNA was hybridized with a BPA-specific aptamer (T-DNA) to form a double helical structure. After the embedding of methylene blue (MB), this structure emitted measurable electrochemical signals. BPA specifically binds to T-DNA to form a stable BPA G-tetrad structure, thereby inducing the release of the aptamer chain and the embedded MB from the surface into solution, resulting in the reduction of the current signal. The constructed electrochemical biosensor provided a linear response to BPA concentration from 1.0 × 10−9 M to 5.0 × 10−7 M with a detection limit of 9.8 × 10−10 M. This strategy also provided good selectivity for BPA compared to similar interferents.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Yan Wu,Panpan Cao,Yanhao Jiang,Yanjuan Liu,Yuefei Zhang,Wei Chen,Zhengwu Bai,Sheng Tang
Nowadays, the efficient detection of environmental organic pollutants has been a research focus in the field of chromatographic analysis . In this work, aminopropylimidazole was designedly introduced to adjust the hydrophobicity of the long-chain alkyl group , and a novel chromatographic stationary phase for the separation and analysis of environmental organic pollutants was specially prepared. Specifically, the waste aminopropyl silica gel (5 μm) was first recycled as the raw material, which was calcined at high temperature and then acidified with hydrochloric acid solution to obtain the activated silica gel. Afterwards, a new type of aminopropylimidazole/dodecyl dual-functionalized silica stationary phase (Sil-API-DD) was synthesized via one-pot reaction of the activated silica gel with 3-chloropropyltrimethoxysilane, dodecyltrimethoxysilane and 1-(3-aminopropyl)imidazole. The separation performance of Sil-API-DD was evaluated using environmental organic pollutants as the model analytes, and the results showed that an effective separation of seven alkylphenols, five bisphenols , six phthalates , seven steroid hormones and six benzophenones in reversed-phase chromatography was achieved. Moreover, the developed Sil-API-DD was found to exhibit more flexible selectivity and superior separation efficiency compared with the commercial C18 column under the tested conditions, suggesting a good application prospect.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xia Zhang,Xitong Yang,Bing Liu,Guifen Zhu,Jing Fan
An approach of simultaneous iodine doping and heterojunction fabricating with basic bismuth salt was proposed, Based on this, a novel I/BiOIO 3 /[Bi 6 O 6 (OH) 3 ](NO 3 ) 3 ∙1.5H 2 O (I/BiOIO 3 /BHN) photocatalyst was prepared. The photocatalytic activity was evaluated by the degradation of multiple refractory pollutants (rhodamine B, methyl orange, phenol , bisphenol A, bisphenol B, bisphenol Z) in water under solar light irradiation. Compared with single photocatalyst, the optimized sample displayed the reaction rate constant of 0.1606 min −1 , which was 69.8, 11.4 and 2.2 times of individual [Bi 6 O 6 (OH) 3 ](NO 3 ) 3 ∙1.5H 2 O, BiOI and BiOIO 3 , respectively. The performance improvement was attributed to the inhibition of charge carrier recombination by type II heterojunction formation and the expanded solar capture range caused by the springboard effect of iodine impurity level. The photocatalytic mechanism of I/BiOIO 3 /BHN was hole oxidation , followed by·OH oxidation. Besides, the I/BiOIO 3 /BHN photocatalyst in bulk structure with micrometer size and high-density could be easily separated and recovered by simple sedimentation, confirming its good application prospect in the wastewater treatment .
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2021
·
IF 6.057
Lizhen Han,Xiaowan Zhang,Dan Li,Mengyuan Li,Peige Qin,Shufang Tian,Youmei Wang,Minghua Lu,Zongwei Cai
As a type of environmental endocrine disrupting chemicals , bisphenols (BPs) have a certain embryonic toxicity and teratogenicity, which can significantly increase the risks of breast cancer, prostate cancer, leukemia and other cancers. In this work, stable multivariate metal-organic frameworks (UiO-66-NH 2 /TCPP x ) were synthesized via in situ one-pot method and used as miniaturized dispersive solid-phase extraction (dμSPE) sorbents for extraction of trace BPs from environmental samples. The phase purity, crystal morphology and physical properties of UiO-66-NH 2 /TCPP x samples were varied by adjusting the mass ratio of TCPP . The extraction performance of UiO-66-NH 2 /TCPP x samples were investigated and UiO-66-NH 2 /TCPP 1.0 exhibited the highest adsorption efficiency. Besides, UiO-66-NH 2 /TCPP 1.0 possessed excellent recycling stability for the adsorption and desorption of BPs more than 20 cycles. The experimental parameters including amount of adsorbent, adsorption time, sample solution pH, temperature, desorption time and desorption solvents which affecting the efficiency of dμSPE were studied, respectively. Good linearity (R 2 > 0.9992) in range of 0.1–200 ng mL −1 was obtained. The detection limits (S/N = 3) and quantification limits (S/N = 10) were achieved at 0.03–0.08 ng mL −1 and 0.1–0.5 ng mL −1 , respectively. The relative standard deviations (RSDs) of intra-day and inter-day ranged from 2.5 to 5.5% and 1.1–6.8%. Enrichment factors were calculated in the range of 303–338. The obtained recoveries of bisphenol F (BPF), bisphenol A (BPA), bisphenol B (BPB) and bisphenol AF (BPAF) were 81.26–91.03% (RSDs = 0.96–6.47%), 82.2–97.27% (RSDs = 0.45–6.15%), 87.56–97.26% (RSDs = 1.1–6.22%) and 82.2–100.8% (RSDs = 0.46–4.07%). The UiO-66-NH 2 /TCPP 1.0 can be employed as potential dμSPE sorbents for the enrichment of trace BPs in the environmental samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Jie Liu,Qian Liu,Liulin Wei,Xiaomei Chen,Zhiqiang Li,Yidong Xu,Xueyun Gao,Xiaoxiao Lu,Jingchan Zhao
An on-line in-tube solid-phase microextraction (in-tube SPME) coupled with high-performance liquid chromatography (HPLC) method was proposed based on a novel polyhedral oligomeric silsesquioxane (POSS)-hybrid monolith for the determination of four bisphenols (BPs) in milk. The monolith was synthesized using acrylamide (AM) and monomethacrylate-functionalized POSS (mono-MA-POSS) as functional monomers to copolymerize with ethylene dimethacrylate (EDMA). Due to the abundant hydrogen bonding, π-π and hydrophobic interaction sites, the synthetic monolith displayed satisfying extraction performance for target BPs. Under the optimized conditions, the developed on-line in-tube SPME-HPLC method exhibited low limits of detection (LODs) (0.030–0.055 ng mL −1 ). The spiked recoveries were between 85.4 % and 111.8 %, and the relative standard deviations (RSDs) were less than 3.5 % for all the analytes. The results showed that the proposed method provided alternative for the analysis of BPs in complex samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Mingxia Sun,Juanjuan Feng,Jiaqing Feng,Haili Sun,Yang Feng,Xiangping Ji,Chunying Li,Sen Han,Min Sun
To improve the extraction efficiency of carbon fibers (CFs) toward organic pollutants, TiO 2 nanorod arrays (NARs) were grown in situ on CFs. Subsequently, biochar nanospheres and covalent organic framework nanospheres were separately introduced to functionalize the NARs. A sequence of materials was produced by regulating the reactant concentrations and characterized using a scanning electron microscope, an X-ray photoelectron spectrometer, an X-ray diffractometer, a Raman spectrometer, and a specific surface area analyzer. The materials were then deposited into separate poly(etheretherketone) tubes for in-tube solid-phase microextraction (IT-SPME). These tubes were evaluated with different types of organic pollutants (polycyclic aromatic hydrocarbons (PAHs), estrogens, bisphenols, and phthalate esters) using a combination of high-performance liquid chromatography and IT-SPME, and they exhibited diverse extraction performance. The extraction mechanism of each material is carefully discussed, and the structure–performance relationship is also summarized based on the chemical structures and extraction properties of the materials. The most efficient extraction materials for different analytes were discovered and used to develop analytical methods. Three online methods were used to sensitively detect PAHs, estrogens, and bisphenols in real water samples, respectively. Satisfactory results were obtained, including enrichment factors up to 6784, detection limits as low as 0.001 μg L −1 , linear ranges of 0.003–15.0 μg L −1 , and relative standard deviations ranging from 0.2% to 15.2%. The results indicate that these methods have some advantages over previous material-based methods.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 25
·2857-2864
·
IF 2.896
Lan Wang,Huan Zhang,Hang Shi,Baodan Jin,Xiaoyun Qin,Geng Wang,Kucong Li,Tingting Zhang,Hongzhong Zhang
In this study, we develop a highly sensitive and selective photoelectrochemical (PEC) sensor for bisphenol A (BPA) determination by combining a TiO2/CdS heterostructure with inorganic framework molecular imprinting (MI) technology. A MI-TiO2/CdS heterostructure was synthesized via successive ionic layer adsorption combined with an inorganic framework molecular imprinting method. Due to the matched energy level distribution of TiO2 with CdS, the formed heterojunction promotes photogenerated charge separation and enhanced PEC conversion. The MI-TiO2/CdS based PEC sensor exhibits higher photocurrent responses and perfect selectivity for BPA under simulated sunlight irradiation. Benefiting from the unique heterostructure and special recognition ability of MI-TiO2/CdS, the photocurrent is linear to the concentration of BPA (range from 1 to 100 pmol L−1), with a low limit detection of 0.5 pmol L−1 (S/N = 3). Meanwhile, the detection results show that the PEC sensor exhibits excellent sensitivity, high selectivity, and good stability. Furthermore, the PEC sensor was successfully applied to the real environmental sample detection of BPA, in lake and river water, domestic wastewater and tap water. This PEC sensor exhibits favourable BPA detection, and it is also a promising method by which to measure other similar environmental substances selectively and sensitively in future work.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2021
·Vol. 34
·期 4
·743-751
·
IF 3.223
Yingying Yang,Siyao Liu,Penghui Shi,Guohua Zhao
A label-free DNA-based electrochemical biosensor owning high sensitivity and selectivity has been established for detecting bisphenol A in a wide range of applications. Coupling the high electrochemical performance of graphene oxide-thionine-Au nanomaterial with the specific binding capacity of the aptamers to BPA, the monitoring of trace amount of BPA was realized, the detection limit was 3.3 pg ⋅ mL −1 with strong anti-interference. Besides, using molecular docking, it was found that BPA binds to the bases DC-49, DC-51, DG-52, DG-53 and DA-63 on the aptamer via hydrogen bonding and π-π stacking interactions. Finally, the biosensor had been successfully applied in different real samples.
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 11
·1404-1411
·
IF 2.896
Wenxue Xu,Yufeng Hu,Minghuo Wu,Enming Miao,Hao Zhou,Xuwang Zhang,Jingjing Zhan
A method consisting of solid-phase isotope dansylation (derivatization with dansyl chloride) and liquid chromatography-high resolution mass spectrometry (LC-HRMS) was developed for the quantitative analysis of phenolic compounds (phenols) in environmental samples. A magnetic-HLB (hydrophilic lipophilic balanced) material was synthesized and applied as an adsorbent in magnetic solid-phase extraction (MSPE) for the enrichment of the analytical targets. Furthermore, with the solid-phase isotope labeling, the desalting and removal of labeling residuals could be simplified over conventional in-solution labeling. In addition to overcoming the matrix effect by isotope dansylation, the sensitivity for the analysis of phenols by LC-HRMS was remarkably improved by over 100-fold. The method was systematically verified, and good accuracy (86.5–104.9%) and precision (<8.6% and <11.4% for intra- and inter-day, respectively) were achieved for the tested 15 phenols. The limits of detection (LODs) of this method were estimated to be 0.2–5 ng L−1 and 5–100 ng kg−1 in estuary water and sediment samples, respectively. With this method, samples collected from the Daliao River estuary (Panjin, China) were analyzed. It was found that all of the targeted phenols were detected at concentrations ranging from unquantifiable to 485 ng L−1 (the total concentration of analytes found in each sample were in the range 822–957 ng L−1) and unquantifiable to 1368 ng kg−1 (the total concentration of analytes found in each sample were in the range 2251–2992 ng kg−1) in water and sediment, respectively.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Methods
·
2020
·Vol. 13
·期 1
·133-140
·
IF 2.596
Jinna Zhang,Haiyang Wang,Longhua Xu,Zhixiang Xu
A novel mesoporous fluorescent molecularly imprinted sensor for selective detection of bisphenol A (BPA) in food materials was fabricated via a semi-covalent imprinting method. The imprinting precursor that served as an alternative template molecule for BPA was prepared via thermally reversible isocyanate bonding, which effectively improved the imprinting efficiency for the molecularly imprinted sensor. Carbon dots (CDs) were embedded in mesoporous silica as signal recognition elements that exhibited quenching upon BPA binding. Subsequently, through the sol–gel process, the molecularly imprinted layer was coated on the CDs silica layer and provided specific recognition sites for BPA. The composite of CDs embedded in the mesoporous molecularly imprinted polymer (CDs@MIP) was characterized with scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller measurements and thermogravimetric analysis. The mechanism of carbon dots quenching and the high selectivity of CDs@MIP towards BPA were explored. The linear response range of the sensor was from 0.025 mg L−1 to 2 mg L−1 with a limit of detection of 0.016 mg L−1. The method was successfully applied for the determination of food samples and recoveries ranged from 92.5% to 101.1%. The BPA contents in actual samples were determined using high performance liquid chromatography and the proposed sensor, showing no significant difference between the two methods.
✓ 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）