LUMINESCENCE
·
2021
·Vol. 37
·期 1
·118-126
·
IF 2.464
Ke Su,Guoqiang Xiang,Xinrong Jin,Xin Wang,Xiuming Jiang,Lijun He,Wenjie Zhao,Yaming Sun,Chen Cui
Locust powder was converted into water-soluble fluorescent nitrogen-doped carbon dots (N-CDs) with gram-scale yield through a self-exothermic reaction between nitric acid and diethylenetriamine (DETA) within 10 min. The morphology, elemental information, and optical properties of the N-CDs were characterized using high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared, ultraviolet–visible and fluorescence spectroscopy. Spectroscopic investigation indicated that the fluorescence emission behaviour of N-CDs is excitation wavelength dependent, with the strongest emission peak at 470 nm using a 390 nm excitation wavelength. The strong absorption peak of sunset yellow (SY) at 482 nm overlaps substantially with the blue emission peak (470 nm) of N-CDs. This enables the fluorescence emission of N-CDs to be obviously quenched by SY through the inner filter effect. There was a good linear relationship between the fluorescence quenching degree and the concentrations of SY within the range 0.5–40 μM. The detection limit of developed fluorescence assay for SY is 28 nM, and the relative standard deviation is 2.3% (c = 10 μM). The N-CDs derived from locusts by the self-exothermic reaction are highly selective and sensitive fluorescent probes for SY, which were applied to the fluorescence sensing of SY in different food samples with satisfactory results.
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PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 105
·86445-86452
·
IF 3.84
Zhenzhen Zhang,Lingling Wang,Xueyan Liu,Danfeng Zhang,Lei Zhang,Qi Li
A new micro-solid-phase extraction method based on a prestructured filter membrane was developed to facilitate simultaneous analysis of tartrazine (TA) and sunset yellow (SY) with high performance liquid chromatography (HPLC). A filter membrane impregnated with nano-Al2O3 particles was proposed as a new micro-solid-phase extraction (μ-SPE) device for the preconcentration of colorants in food. The method integrated isolation and concentration in one step, and the adsorbed colorants could be easily eluted from the filter membrane for HPLC analysis. This process does not involve any additional sample treatment. The method is facile and easy to operate. The method showed good linearity, with correlation coefficients >0.9982 in the range of 1.0–200.0 ng mL−1, and low limits of detection (0.10–0.20 ng mL−1). Finally, the recovery values were 86.9–124.0% for the colorants in various food samples. The results indicated that the developed method would be a novel method for rapid determination of TA and SY at trace levels in real samples.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2014
·Vol. 161
·期 14
·B297
·
IF 2.859
Meiling Wang,Yunqiao Gao,Qian Sun,Jianwei Zhao
A highly sensitive method for simultaneous electrochemical determination of Sunset yellow (SY) and Tartrazine (Tz) in foods was proposed based on the stable aqueous dispersions of polypyrrole (ppy) decorated oxidized single-walled carbon nanotubes (SCNT-COOH). Under optimal experimental conditions, the dispersions modified glassy carbon electrode (GCE) exhibited remarkable sensitivity of (72.36 μA/μM and 23.39 μA/μM) with wide linear responses to Sunset yellow and Tartrazine ranging from 5.0 × 10−9 to 1.0 × 10−6 M and 7.0 × 10−9 to 1.0 × 10−6 M, and detection limits as low as 7.0 × 10−10 M and 1.0 × 10−9 M for Sunset yellow and Tartrazine, respectively, which might be due to hydrogen bonds between hydroxyl groups of dyes and oxygen-containing groups of the composite. In addition, the electrostatic interaction between the dyes and the ppy may also play a main role except for good dispersibility.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Guangli Li,Yafeng Zhang,Yonghui Xia,Tianyu Wang,Yuan Jin
Excessive consumption of Sunset Yellow (SY) and Tartrazine (Tz) might cause adverse effects on human health. Hence, it is essential to develop a rapid and reliable technique for simultaneous determination of SY and Tz. Herein, an innovative voltammetric sensor was constructed for simultaneous determination of SY and Tz using multiwalled carbon nanotubes decorated dandelion-like α-MnO 2 microspheres (MnO 2 /MWCNTs). The physiochemical properties of MnO 2 /MWCNTs were studied by various microscopic, spectroscopic, and electrochemical techniques. Various parameters, including accumulation time, accumulation potential, loading volume, buffer pH, and scanning rate, were systematically explored in order to pursuit the higher peak current response. The MnO 2 /MWCNT effectively enlarged the electroactive surface area and expedited the electron transfer. As a result, the MnO 2 /MWCNT decorated glassy carbon electrode (GCE) displayed superior sensing performance for the electrooxidation of SY and Tz over a wide concentration range (0.06–10 μM), owing to the synergistic effect from dandelion-like α-MnO 2 microspheres and highly conductive MWCNTs. The detection limits were 0.005 and 0.01 μM for SY and Tz, respectively. In addition, the MnO 2 /MWCNT/GCE demonstrated strong anti-interfering capacity against potential interfering species, and highly reproducible electrode manufacture. The MnO 2 /MWCNT/GCE was successfully employed for the simultaneous and sensitive determination of SY and Tz in carbonate beverage with good recovery.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
·
IF 5.091
Huan Yang,Yuwei Long,Hongxi Li,Shuang Pan,Hui Liu,Jidong Yang,Xiaoli Hu
In this work, the carbon dots (CDs) were synthesized by an one-pot portable hydrothermal method from sodium citrate and NH 4 HCO 3 . The obtained CDs were found to show high fluorescence quantum yield (31%), excitation-wavelength independence, outstanding water-soluble, excellent chemical and optical stability. Interestingly, it was discovered that sunset yellow (SY) was sensitive and effective in quenching the fluorescence of CDs. Based on this observation, CDs could be applied as a novel fluoescent probe for detection of SY. The analytical potential of this probe was evaluated and illustrated a good linear relationship at the concentration range from 0.25 to 56.0 μmol L −1 with a detection limit (3σ/k) of 74.49 nmol L −1 . Meanwhile, the practicality of this nanosensor for SY determination in real samples was validated with good accuracy and precision. In addtion, long time UV radiation and high ionic strength hardly influenced on the fluorescence intensity of CDs. However, the fluorescence intensity of CDs decreased at higher temperature and the fluorescence was recovered when temperature back to 5 °C. Therefore, CDs could be also employed as an fluorescent temperature sensor with significant sensitivity, linearity and remarkable reversibility.
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Shuangbao Li,Shuaibing Ma,Jingyu Sun,Yuteng Zhang,Zi'an Wang,Lingfeng Sheng,Bo Jiang,Qingxin Liu,Li Jin
In present work, a dye-integrated composite material, FS@ZrT-1-NH 2 , was fabricated through a one-pot solvothermal method. The fabrication process involved the effective combination of fluorescein sodium (FS) with an amino-functionalized metal-organic cage (ZrT-1-NH 2 ) matrix. Subsequently, the as-prepared composite was employed as a dual-emission fluorescent probe for the targeted detection of sunset yellow (SY). Interaction energy and reduced density gradient (RDG) analyses revealed that hydrogen bonding interactions played a pivotal role in the stabilization of the composite. The unique dual-emission signal originated from efficient energy transfer between the cage and the embedded FS. This sensor exhibited a wide linear response to SY from 9.945 to 16.575 nM with a low detection limit of 0.980 nM, alongside remarkable selectivity. The fluorescence quenching mechanism was attributed to the synergistic effect of the inner filter effect (IFE) and static quenching. Notably, the proposed FS@ZrT-1-NH 2 ratiometric fluorescent probe achieved high recovery rates (102.02%–106.10%) and low relative standard deviations (RSD <3.1%) for SY detection in orange-flavored carbonated beverages, verifying its feasibility and practical applicability. These findings demonstrate that the dual-emission FS@ZrT-1-NH 2 composite can function as a highly promising platform for the sensitive and selective detection of SY.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Ting Li,Xianming Ma,Gaigai Xue,Xiaohui Ju,Jian Liu,Lu Wang
Sunset yellow, one of the most widely used synthetic pigments in the food industry, may cause an adverse reaction in the human body due to its cytotoxicity and potential genotoxicity when overdosed. Developing a rapid, low-cost, and convenient detection method for the sunset yellow pigment is necessary. In this study, we report the fabrication of a highly sensitive and selective sensor for sunset yellow detection based on solution-gated graphene transistors (SGGT). To improve the performance of the SGGT-based sensor, we modified the Au gate electrode with multi-walled carbon nanotubes (MWCNTs). The detection limit of the MWCNT-modified SGGT sensor was 100 nM, and the linear range was from 300 nM to 100 μM. More importantly, the SGGTs sensor showed a selective response to sunset yellow. Finally, we demonstrated that the optimized SGGT-based sensor could detect the concentration of sunset yellow in Fanda soft drink. Therefore, we believe that the SGGT-based sensor with the reported effective modification can be used in the field of food safety and quality control, providing a promising platform for detecting many other analytes.
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高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Lijuan Zhao,Faqiong Zhao,Baizhao Zeng
A novel water-compatible molecularly imprinted ionic liquid polymer − ionic liquid functionalized graphene composite film coated glassy carbon electrode (MIP − rGO-IL/GCE) is presented. It is fabricated by coating a GCE with amine-terminated ionic liquid functionalized graphene (rGO-IL) and then with water-compatible MIP suspension. The water-compatible MIP is prepared by free radical polymerization in methanol-water system using sunset yellow (SY) as template and ionic liquid 1-(α-methyl acrylate)-3-allylimidazolium bromide (1-MA-3AI-Br) as functional monomer, which can interact with SY through π-π, hydrogen-bonding and electrostatic interaction. The resulting MIP − rGO-IL/GCE shows good performance when it is used for the differential pulse voltammetric determination of SY. Under the optimized conditions (i.e. pH 7.5, 0.1 M phosphate buffer, preconcentration under open-circuit for 570 s), the peak current is linear to SY concentration in the ranges of 0.010 μM − 1.4 μM and 1.4 μM − 16 μM with sensitivities of 5.0 μA/μM mm 2 and 1.4 μA/μM mm 2 respectively; the detection limit is 4 nM (S/N = 3). The electrode has been successfully applied to the determination of SY in some soft drinks, and the recoveries for the standards added are 95% − 107%.
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高影响因子
MOLECULES
·
2018
·Vol. 23
·期 9
·2130
·
IF 3.098
Quanguo He,Jun Liu,Xiaopeng Liu,Yonghui Xia,Guangli Li,Peihong Deng,Dongchu Chen
Control and detection of sunset yellow is an utmost demanding issue, due to the presence of potential risks for human health if excessively consumed or added. Herein, cuprous oxide-electrochemically reduced graphene nanocomposite modified glassy carbon electrode (Cu2O-ErGO/GCE) was developed for the determination of sunset yellow. The Cu2O-ErGO/GCE was fabricated by drop-casting Cu2O-GO dispersion on the GCE surface following a potentiostatic reduction of graphene oxide (GO). Scanning electron microscope and X-ray powder diffractometer was used to characterize the morphology and microstructure of the modification materials, such as Cu2O nanoparticles and Cu2O-ErGO nanocomposites. The electrochemical behavior of sunset yellow on the bare GCE, ErGO/GCE, and Cu2O-ErGO/GCE were investigated by cyclic voltammetry and second-derivative linear sweep voltammetry, respectively. The analytical parameters (including pH value, sweep rate, and accumulation parameters) were explored systematically. The results show that the anodic peak currents of Cu2O-ErGO /GCE are 25-fold higher than that of the bare GCE, due to the synergistic enhancement effect between Cu2O nanoparticles and ErGO sheets. Under the optimum detection conditions, the anodic peak currents are well linear to the concentrations of sunset yellow, ranging from 2.0 × 10−8mol/L to 2.0 × 10−5mol/L and from 2.0 × 10−5mol/L to 1.0 × 10−4mol/L with a low limit of detection (S/N = 3, 6.0 × 10−9mol/L). Moreover, Cu2O-ErGO/GCE was successfully used for the determination of sunset yellow in beverages and food with good recovery. This proposed Cu2O-ErGO/GCE has an attractive prospect applications on the determination of sunset yellow in diverse real samples.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2021
·
IF 4.556
Guangxin Lv,Beichen Shi,Hong Huang,Haodong Chen,Huajie Feng,Pan-Pan Zhou,Weichun Ye,Zhifei Zhang,Zhaoyong Yang
NiO nanoparticles (NPs) with small Ag NPs loading supported on reduced graphene oxide nanosheets (ternary NiO/Ag/RGO nanocomposites) were synthesized via a hydrothermal process followed by high-temperature calcination, extending the synergistic effects among noble metal, metal oxide and carbon materials. Based on ternary NiO/Ag/RGO nanocomposites, a new electrochemical sensor was fabricated for the detection of sunset yellow (SY) in soft drinks through cyclic voltammetry, Tafel plot and differential pulse voltammetry. The experimental conditions were optimized and kinetic parameters studied. Due to the synergistic effect of the ternary components, the prepared sensor exhibited superior electroanalytical performance toward SY detection, including wide linear range from 0.1 to 50 μM and from 50 to 450 μM, low detection limit of 13 nM, excellent specificity against various interfering colorants, good reproducibility and stability. Importantly, the electrochemical sensors was successfully employed for quantitative SY analysis in soft drinks with satisfactory recoveries, where the analyzed results were also in agreement with LC/MS analysis.
研究领域:
分析化学
·
材料科学
·
食品科学
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yongfeng Chen,Geoffrey I.N. Waterhouse,Hemei Sun,Xuguang Qiao,Yufeng Sun,Zhixiang Xu
In this work, a novel ratiometric electrochemical sensor based on dual-functional poly-dopamine (PDA) and nickel sulfide@hollow carbon spheres (NiS@HCS) was successfully developed for sunset yellow (SY) detection. The NiS@HCS nanocomposite possessing a large specific surface area, good catalytic activity and excellent electrical conductivity was employed for signal amplification. PDA films prepared by electropolymerization acted as an internal reference probe and enhanced the sensitivity of the proposed sensor through electrostatic attraction between SY and PDA. Under optimized conditions, the developed PDA/NiS@HCS/GCE sensor allowed SY quantification over wide linear range (0.01–100 μM), with a low limit of detection of 0.003 μM. SY recovery tests were carried out in rice vinegar and cooking wine with satisfactory recoveries (83.50–112.80 %). Meanwhile, the content of SY in two kinds of carbonated drinks was determined using the constructed sensor and a UV–Vis spectrometry method, with no significant difference found in the results.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
S. Bonyadi,Kh. Ghanbari
Since synthetic dyes in food samples have the potential to be toxic and pathogenic, their monitoring and evaluation are of particular importance, so it is essential to use methods that are simple and cost-effective for their determination. We have here devised an electrochemical method for the determination of sunset yellow (SY) in food samples. Since the fact that dopamine in the water can be spontaneously polymerized (self-polymerized) in the presence of sunset yellow as a template leads to the fabrication of polydopamine (PDA) imprinted, then by introducing this layer on the silica nanoparticles (SiO 2 ) surfaces with an optimized green one-step synthesis method, SiO 2 @MIP PDA NPs achieved. The synthesized SiO 2 @MIP PDA NPs were identified by Field emission scanning electron microscopy (FE-SEM), High resolution transmission electron microscopy (HRTEM), Atomic force microscopy (AFM), Thermal gravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) techniques. Then, using this MIP , we modified a CPE electrode and built a sensor to detect the SY at optimum conditions. The sensor has a sensitive response and high selectivity for the SY compared to other analogs and similar structural molecules. It also has good stability and acceptable reproducibility. The built-in sensor had a linear response range of 4.5 nM to 9.1 µM, and a detection limit of 1.5 nM (S/N = 3). This sensor has been used successfully to diagnose SY in several food samples. The extraordinary behavior of this sensor can be assigned to the imprinted cavities of the effective matrix which matched strongly and non-imprinted PDA electronic barriers to the molecules that are outside.
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