SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Jing-Hui Zhu,Meng-Meng Li,Shao-Pu Liu,Zhong-Fang Liu,Yuan-Fang Li,Xiao-Li Hu
Carbon dots (CDs) with a fluorescence quantum yield of approximately 2.41% were prepared by simple one-step hydro-thermal synthesis of triethylenetetramine-N, N, N′, N″, N‴, N‴-hexaacetic acid (TTHA). The obtained CDs possess excitation wavelength-dependent and pH insensitive photoluminescence (PL) properties. Notably, the as-prepared CDs also exhibited unique auramine O (AO)-stimulus-responsive dual-emission fluorescence individuality, with which detection of AO using CDs has been performed through a fluorescence resonance energy transfer process. The fluorescence signals are linearly correlated with the concentration of AO over a range of 0.18–16.0 μM ( R 2 = 0.9989), with a limit of detection (3 σ ) of 54 nM. Additionally, a keypad lock and a NOR–AND logic gate was designed as well.
研究领域:
分析化学
·
纳米材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Wenhui Wang,Heera Jayan,Usman Majeed,Xiaobo Zou,Qin Hu,Zhiming Guo
The misuse of additives is a major problem for global food safety, and of particular concern is Auramine O (AO). Although the analysis of AO by fluorescent carbon dots (CDs) has been extensively explored, the development of effective sensitivity enhancement and portable detection solutions based on CDs remains a significant challenge. Herein, we developed a dual-signal ratiometric fluorescent probe (RFP) integrated with fluorescent nanopaper and smartphone application, which has been used to achieve portable visualization and quantitative detection of AO in food and drug samples. The specific response analysis model (RFP) for AO detection was constructed using fluorescence resonance energy transfer and electrostatic attraction between B-CDs and O-CDs. Within a concentration range of 0.0–10.0 μM, achieving a detection limit as low as 12.3 nM. Furthermore, a laboratory device that incorporates portable fluorescent nanopaper into a smartphone was developed to record the color information response ratio (R/B) in combination with the ColorColl application, enabling visual quantitative measurement of AO. This is powerful construction of RFP, which avoids time-consuming synthesis and complex modification. It directly demonstrates the superiority of proportional fluorescence detection over single wavelength detection. This work provides a referable perspective for preliminary monitoring and rapid on-site detection of harmful factors such as AO in food and drug samples.
研究领域:
食品安全
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分析化学
·
生物传感
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Xiran Yang,Simin Liu
The host−guest interactions between Auramine O ( AuO ) dye and cucurbit[ n ]uril (CB[ n ], n = 7, 8) were investigated in aqueous solution by 1 H NMR, UV/Vis, fluorescence spectroscopic techniques and single crystal diffraction. The results indicate the simultaneous formation of 1:1 and 2:1 inclusion complexes between CB[7] and AuO with two binding constants as 1.17 × 10 5 M −1 and 3.99 × 10 2 M −1 by UV/Vis spectroscopy titration (1.20 × 10 5 M −1 and 5.26 × 10 3 M −1 by fluorescence spectroscopy) in phosphate buffer (pH 7.4). And a 1:2 homoternary inclusion complex CB[8]· AuO 2 with binding constant as 2.95 × 10 9 M −2 (by fluorescence spectroscopy titration) is detected. Interestingly, the appearance of intense new broad emission band with big red-shift (100 nm) with respect to that of AuO proves the formation of excimer upon encapsulation of AuO molecules in CB[8]. Determination of single crystal structure of CB[8]· AuO 2 further discloses the existence of J-type dimer with intermolecular CH···π interactions between two included phenyl groups on AuO molecules. Upon host−guest complexation of AuO with CB[7] or CB[8], the p K a shifts of AuO were measured.
研究领域:
化学
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分子科学
·
超分子化学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Haosheng Sun,Jun Qin,Ludong Yi,Yinghao Ruan,Jun Wang,Dawei Fang
Hydrodynamic cavitation (HC) is not only a promising wastewater treatment technology but also an efficient heat generation method. In this work, the HC degradation of several organic dyes was carried out and the related heat generation was studied. The effects of geometrical parameters (orifice angles (α = 0 ° and± 45 °) and orifice numbers (n = 3–9)) and experimental parameters (2.0–4.0 bar pressures, 30–60 °C temperatures and 5.0–15 mg/L concentrations) on Auramine O degradation and heat generation in orifice plate HC system are investigated. TOC analysis is performed to determine the mineralization degree of Auramine O solution. The generated intermediates are detected by LC-MS. In addition, the produced free radicals in HC process are identified by adding some trapping agents. The results showed that the HC technology has high mineralization and strong heat generation abilities in degradation processes of organic pollutants . For 6-orifice plate, 4.0 bar pressure, 5.0 L solution volume and 10 mg/L concentration, 81.39% degradation ratio of AO was achieved at 90 min cycle moment. And that, 1082.52 kJ heat energy with 40.09% thermal efficiency was obtained during 30 min cycle time. Perhaps, this work may provide a new strategy for simultaneous large-scale organic wastewater treatment and effective heat production recycle.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
Journal of Food Measurement and Characterization
·
2023
·Vol. 17
·期 5
·5360-5370
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IF 3.4
Wang Wenhui,Yang Zhen-quan,Xiao Lixia,Guan Tianzhu,Gong Xiaojuan,Hu Qin
This work present a highly sensitive fluorescence method for auramine O (AO) detection in food and drug samples based on carbon nanodots (CDs). The AO can effectively diminish the emission of CDs based on an integrated quenching mechanism of inner filter effect (IFE) and dynamic reaction. The CDs were prepared via a one-step hydrothermal method with citric acid and o-phenylenediamine as precursors. The good selectivity and high sensitivity feature of the proposed method for AO detection were validated. The fluorescence signals were linearly correlated with AO concentration over a range of 0.01‒10.0 µM with a detection limit of 36.3 nM was obtained. The proposed method was finally used for AO determination in traditional Chinese medicine, curry power, bean curb and candy samples with high accuracy. The recoveries ranged from 95.5 to 107.2% and relative standard deviations (RSDs) were less than 3.39%. This work provided a new insight and an operational access to AO detection in food and drug colorants monitoring. Thus, the CDs-based sensor demonstrated feasibility of rapid AO detection considering its appealing simplicity, rapidity and high sensitivity features.
研究领域:
分析化学
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食品安全
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 7
·398
·
IF 4.8
Weiao Li,Litiao Ren,Yuqi Zhao,Xinping Cong,Mingjin Zhang,Yan Liu,Qihui Shen,Xiaoyang Liu
Herein, an electrochemical sensor is reported for the first time based on an ordered macro–microporous composite derived from metal–organic frameworks (MOFs) for the highly sensitive detection of auramine O (AO), a Group 2B carcinogen. The hierarchical pore architecture, integrating an ordered macroporous network with a microporous ZIF-8 framework, enables the uniform dispersion of a high density of catalytically active sites. The interconnected macroporous channels facilitate efficient mass transport and rapid removal of reaction byproducts, effectively preventing pore blockage and ensuring stable sensing performance during repeated measurements. Owing to these structural advantages, the proposed sensor exhibits outstanding analytical performance toward AO detection, with a sensitivity of 0.4843 μA μM−1, a detection limit of 0.168 μM (S/N = 3), and a wide linear range from 0.5 to 50 μM. Moreover, the sensor demonstrates excellent selectivity and reproducibility, maintaining reliable responses even in the presence of 100-fold excess common food constituents such as tartrazine and glucose. Real sample analysis further confirms its high accuracy and operational stability. Overall, the electrochemical sensor based on silver nanoparticle-decorated ordered macro–microporous ZIF-8 synthesized via in situ reduction shows great potential as a portable and on-site tool for rapid AO detection in food. More broadly, ordered macro–microporous MOF-derived materials represent a promising platform for advanced electrochemical sensor applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2018
·Vol. 41
·期 22
·4185-4193
·
IF 2.415
Wenwu Yang,Turghun Muhammad,Aziguli Yigaimu,Kipayem Muhammad,Lingxin Chen
A novel magnetic molecularly imprinted polymer for the selective recognition of auramine O was rationally designed via screening from a library of nonimprinted polymers. A stoichiometric ratio of functional monomer (itaconic acid) and template molecule (auramine O) was found to be 1.5. Meanwhile, the synthesized SiO 2 @Fe 3 O 4 was modified by 0.5 mol/L hydrochloric acid to facilitate the preparation of magnetic molecularly imprinted polymer particles. Adsorption experiments showed that the magnetic polymer particles exhibited good selectivity, recoveries, and enrichment performance. The stoichiometric imprinted polymers have been employed for the selective preconcentration of auramine O from lake water sample. The high specificity of the stoichiometric imprinted polymers was proven in the extraction of mixture solution of auramine O, auramine O hydrochloride, and chrysoidine, and the recoveries ranged between 99.66 and 108.75% (RSD 2.6–3.7%, n = 3) for lake water. These results suggest that this method is effective and can be successfully applied to the analysis of auramine O in environmental water samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2013
·
IF 2.591
Jiangmei Li,Haiyun Zhai,Zuanguang Chen,Qing Zhou,Zhenping Liu,Zihao Su
A novel method combining molecular imprinting and SPE was developed in a capillary column for the determination of auramine O in shrimp. The capillary monolithic column was prepared by UV-initiated in situ polymerization, using auramine O as template and methacrylic acid and ethylene dimethacrylate as functional monomer and cross-linker, respectively. The properties of the prepared capillary monolithic column were investigated under the optimized conditions coupled with HPLC, and then the morphologies of the inner polymers were characterized by SEM. The calibration curve was expressed as A = 103 C + 19.8 ( r = 0.9992) with a linear range of 0.25–25.0 μg/mL, and the recoveries of auramine O at different concentrations in shrimp ranged from 90.5 to 92.4% with RSDs ranging from 2.1 to 4.4%. The capacities of the molecularly imprinted polymer and nonimprinted polymer columns were 0.722 and 0.147 μg/mg, respectively, and the LOD (S/N = 3) of auramine O in shrimp was 17.85 μg/kg. Under the selected conditions, the enrichment factors obtained were higher than 70-fold. The results indicate that the prepared molecularly imprinted capillary monolithic column was reliable and applicable to the analysis of auramine O in shrimp.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Wenhui Wang,Zhen-quan Yang,Lixia Xiao,Jie Han,Tianzhu Guan,Xiaojuan Gong,Qin Hu
A paper-based assay for visualization of auramine O (AO) was for the first time established by using CFMs as a ratiometric fluorescent probe (RFP). The CFMs were melamine formaldehyde microspheres (MFMs) incorporated with carbon dots (CDs), where the CDs species as sensing units and MFMs as a signal amplification carrier. The proposed RFP can quantitatively measure AO content from 0.0 to 10.0 μM and exhibited an ultralow limit of detection (LOD, 15.7 nM). In particular, obvious luminescence color change of CFMs from blue to green was perceived with naked-eyes and therefore, a solution-based and a paper-based visualization platform were respectively proposed for on-site visual detection of AO with LODs of 1.15 μM and 0.83 μM, separately. Finally, those fluorescence methods were adopted in sensitively quantitative measurement of AO within various food and drug samples, providing new prospects for analysts and technical support in food quality monitoring.
研究领域:
分析化学
·
食品安全
✓ 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）