SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Meiling Wang,Jianwei Zhao
A new facile in situ reduction approach for the preparation of an ionic liquid of 1-allyl-3-methylimidazolium chloride (AMIM-Cl) functionalized reduced graphene oxide supported Au nanoparticle (ILRGO-Au) composite was demonstrated in this work. With the assistance of AMIM-Cl, ILRGO were dispersed easily in aqueous solution and exhibited an improved conductivity. Meanwhile, the Au nanoparticles uniformly loaded on the surfaces of the ILRGO which can increase the specific surface area as well as accelerate electron transfer. These advantages made the ILRGO-Au composites were successfully employed in the fabrication of facile and sensitive electrochemical sensor applied to the simultaneous determination of Sunset yellow (SY) and Tartrazine (Tz) in drinks. In the presence of constant concentration of one of the components, the concentrations of SY or Tz gave linear response ranges equal to 4.0 × 10 −9 to 1.0 × 10 −6 for SY and 7.0 × 10 −9 to 1.5 × 10 −6 M for Tz with detection limits of 5.2 × 10 −10 for SY and 8.3 × 10 −10 M for Tz (S/N = 3), respectively. The new sensor showed good reproducibility and repeatability toward simultaneous determination of SY and Tz, indicating its potentials in detection of other food colorants.
研究领域:
分析化学
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纳米材料科学
·
食品检测
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2015
·Vol. 73
·期 6
·1269-1278
·
IF 1.106
Gao Hejun,Zhang Luanluan,Liao Yunwen
A novel adsorbent consisting of polyethyleneimine-modified multi-wall carbon nanotubes (PEI-MWCNTs) was synthesized by grafting PEI on the carboxyl MWCNTs. The surface properties of the PEI-MWCNTs were measured by scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared, and zeta potential. The adsorption behavior of the PEI-MWCNTs was investigated using sunset yellow FCF as adsorbate. The effects of dosage of adsorbent, the initial pH of solution, contact time and temperature on the adsorption capacity were studied. Then, the kinetics and thermodynamics of the adsorption process were further investigated. Experimental results showed that the adsorption kinetics fitted a pseudo-second-order model and the adsorption isotherms agreed well with the Langmuir model. The adsorption process occurred very fast and the adsorption capacity of PEI-MWCNTs was much higher than that of many of the previously reported adsorbents. Additionally, the plausible adsorption mechanism was discussed.
研究领域:
环境科学
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材料科学
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化学工程
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吸附技术
·
水处理
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2013
·Vol. 160
·期 8
·H459
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IF 2.588
Jing Zhang,Huihui Zhu,Meiling Wang,Wenchang Wang,Zhidong Chen
A novel and sensitive electrochemical method was proposed for the determination of Sunset yellow (SY) using an expanded graphite paste electrode (EGPE). The EGPE was prepared by mixing expanded graphite (EG) with solid paraffin. EG was characterized with scanning electron microscopy. Compared with flake graphite paste and carbon paste electrode, the EGPE showed a higher electrocatalytic activity toward the oxidation of SY. The EGPE exhibited wide linear response of 5.0 × 10−8−2.0 × 10−6 mol/L with a detection limit down to 5.0 nmol/L (S/N = 3) and good accuracy, precision, reproducibility. The proposed method was successfully applied in the determination of SY in jelly and fruit juice.
研究领域:
分析化学
·
食品科学
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Analytical Methods
·
2024
·
IF 2.7
Qian Zhang,Xiaoqi Wang,Lili Yuan,Lina Yu,Congying Shao,Hongxing Jia,Shun Lu
Sunset Yellow (SY) is a widely used food coloring in the food industry. However, exceeding the allowable limit of this dye poses a significant threat to human health. To address this issue, we developed Lycium ruthenicum-derived nitrogen-doped carbon dots (N-CDs) with a stable blue fluorescence through hydrothermal treatment for SY determination. The quantum yield (QY) of these N-CDs was found to be up to 10.63%. Physical characterization of N-CDs was performed using various spectroscopic techniques to confirm their excellent photostability and non-toxic properties. Furthermore, the presence of SY had a substantial quenching effect on the fluorescence intensity (F0/F) of the N-CDs. Leveraging this observation, we developed a fluorescent sensor for the determination of SY in the concentration range of 0.05 to 35.0 μM, with a limit of detection (LOD, 3σ/K) of 17 nM. The excellent fluorescent sensor also showed satisfactory results in the practical drink samples. Moreover, the stability and cytotoxicity of N-CDs as a fluorescent probe were studied. Finally, the N-CDs were applied to cell imaging using A549 cells.
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PubMed
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 21
·8760-8766
·
IF 1.938
Mei-ling Wang,Qian Sun,Yun-qiao Gao,Xiong-bo Yang,Jian-wei Zhao
A new electrochemical sensor to determine Sunset yellow (SY) in foods has been developed. A composite consisting of highly dispersed polypyrrole (ppy) and single-walled carbon nanotube (ppy–SCNT) was synthesized as a modification via a facile method at room temperature. The ppy–SCNT composites were demonstrated to be highly sensitive for SY detection. The influences of pH value, amount of ppy–SCNT dispersion, accumulation time and scan rate on the signal enhancement of SY are discussed. Under optimal experimental conditions, the ppy–SCNT modified glass carbon electrode (ppy–SCNT/GCE) exhibited a wide linear response to SY ranging from 2.0 × 10−9 to 1.5 × 10−6 M with a high sensitivity of 91.53 μA μM−1 and a low detection limit of 3.0 × 10−10 M (S/N = 3). The novel ppy can prevent the aggregation of SCNT via π–π interaction, and enhance their electrochemical properties for the measurement of Sunset yellow in food samples. The novel sensor possesses following features: facile fabrication, easy operation and acceptable stability. The analysis of real sample drinks demonstrated that the electrode has excellent selectivity.
研究领域:
食品科学
·
分析化学
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.4
Mei Wang,Shan Mou,Xiaofang Tian,Meijie Xie,Xinyu Luo,Pei Zhang,Yingjuan Wang,Boyan Zheng,Qingqing Zou,Qianchun Zhang
Sunset yellow (SY) is a widely used artificial food coloring that can pose health risks when consumed in excess. In this study, a fluorescent sensor for the quantitative analysis of SY content in complex foods was reported. Using ammonium fluoride and sorbic acid as precursors, fluorine-doped carbon quantum dots (F-CDs) were synthesized via solvothermal method. The prepared F-CDs were characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results revealed that F-CDs had a uniform morphology and fluorine-rich structure, with an average particle size of 2.15 nm. In addition, we found that F-CDs exhibited excellent selectivity for SY, mainly due to the fluorescence quenching effect of SY on F-CDs. Therefore, a fluorescent sensor based on F-CDs was constructed with a linear detection range of 0.010–75 μM ( R 2 = 0.997) and a detection limit of 30 nM. The sensor's practical applicability was demonstrated by analyzing of SY in hard candy, tangerine peel sugar, peach jelly, beer, and bread, with recoveries of 92.1%–115% and RSDs of 1.0–4.8%. What's more, the fluorescence detection results were closely related to the HPLC-DAD validation results (relative deviation ≤0.17), highlighting the accuracy of the method. F-CD-based fluorescence detection platforms offer the advantages of simplicity, sensitivity, and reliability, providing a promising tool for routine SY monitoring in food safety applications.
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ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Yajuan Cai,Xiaoyu Li,Kangbing Wu,Xiaofeng Yang
Two lanthanide metal-organic frameworks (Ln-MOFs) using 1,3,5-benzenetricarboxylic acid (H 3 BTC) and Ln(III) nitrate hydrate (Ln = Eu, Er) as precursors have been prepared through a one-step solvothermal approach. The as-synthesized compounds were characterized by X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy, confirming that the targeted Ln-MOFs were successfully synthesised, with a straw-sheaf appearance. Their sensing properties were studied using cyclic voltammetry and electrochemical impedance spectroscopy , and the results showed that the prepared Ln-BTCs possessed larger electrochemical-response areas and stronger electron-transport capability, especially the Er-BTC. The oxidation behaviour of Sunset Yellow was investigated, and it was found that the Er-BTC exhibited a superior enhancement effect. Chronocoulometry was used to prove that Er-BTC more strongly adsorbs Sunset Yellow, resulting in a larger electrochemical response signal. The novel Sunset Yellow sensor exhibited a linear response in the range of 0.2–100 nM with a low limit of detection (0.05 nM, S/N = 3), and was applied in drink samples. The results were validated by high-performance liquid chromatography , indicating this sensor is a promising tool for Sunset Yellow detection.
研究领域:
材料科学
·
分析化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Junhua Li,Mengqin Liu,Jianbo Jiang,Beibei Liu,Haixia Tong,Zhifeng Xu,Chunming Yang,Dong Qian
In this work, we demonstrate the morphology-controllable syntheses of CuS crystals by a facile hydrothermal/solvothermal method through merely changing the reaction solvents without employing any surfactants, templates or structure-directing agents. The dependence of electrochemical sensing properties for tartrazine (TT) and sunset yellow (SY) on the morphologies of CuS crystals (microspheres, hexagonal microsheets, sandwich-like plates, interlaced nanosheets and nanoflowers) was studied by voltammetric techniques. Among these CuS structures, the CuS nanoflowers constructed by textile-like nanosheets with a three-dimensional (3D) hierarchical porous structure hold the largest Brunauer–Emmett–Teller specific surface area (37.12 m 2 g −1 ) and display the highest electrocatalytic activities to the TT and SY oxidations. Consequently, the CuS nanoflowers modified electrode exhibits outstanding electrochemical sensing performances, i.e. high sensitivities of 1.7331 and 0.2260 A M −1 for TT, and 0.4228 and 0.01564 A M −1 for SY, low detection limits of 0.012 μM for TT and 0.006 μM for SY, and satisfactory recoveries of 97.0–104.5% for TT and 99.0–105.0% for SY. Simultaneously, it also features excellent anti-interference, stability and reproducibility. The superior sensing performance of CuS nanoflowers may benefit from its unique 3D hierarchical porous architecture, which can facilitate the electrolyte infiltration and promote the active material utilization efficiency. Based on these findings, we can draw a reasonable conclusion that CuS with a flower-like structure is promising electrocatalysts for efficiently sensing TT and SY.
研究领域:
材料科学
·
分析化学
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DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Zhiyan Chen,Zhaomei Wu,Lulu Jiang,Tingting Li,Yajun Gao
The control and detection of sunset yellow (SY) are very important due to the high risk of harmful effects on humans caused by excessive intake. In this work, we reported the synthesis of hollow mesoporous carbon spheres (HMCS) and their application in developing a novel electrochemical sensor for SY. Initially, three hollow carbon spheres with different sizes and pore structures were synthesized by adjusting the ratio of TPOS and TEOS using the hard-templating approach. In comparison, HMCS showed the smallest diameter (290 nm), the largest surface area (2229.1 m 2 g −1 ), and a high content of mesoporous structure. This provides a structural basis for high-efficiency pre-concentration of SY on the surface of the HMCS-modified electrode, which effectively improves its electrocatalytic activity . Under optimized conditions, the HMCS/GCE sensor showed a wide linear range varying from 0.0015 − 4 µM, with an ultralow LOD (0.12 nM). Moreover, the HMCS/GCE sensor was deployed for the detection of SY with the advantages of impressive anti-interference ability, satisfactory reproducibility, good repeatability as well as long-term stability. The proposed sensor has been successfully used for the detection of SY in food samples with spiked recoveries of 91.1–103.3%, showing the promising application of the method for the detection of SY in the food matrix.
研究领域:
分析化学
·
电化学
·
食品科学
·
纳米材料
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Yusheng Yuan,Xin Zhao,Man Qiao,Jinghui Zhu,Shaopu Liu,Jidong Yang,Xiaoli Hu
Fluorescent carbon dots was prepared by heating N -(2-hydroxyethyl)ethylene diaminetriacetic acid in air. The carbon dots were not only highly soluble in water but also uniform in size, and possessed strong blue fluorescence and excitation wavelength-dependent emission properties with the maximum excitation and emission wavelength at 366 nm and 423 nm, respectively. Food colorant sunset yellow whose excitation and emission wavelength at 303 nm and 430 nm could selectively quench the fluorescence of carbon dots, efficient fluorescent resonance energy transfer between the carbon dots and sunset yellow is achieved. This was exploited to design a method for the determination of sunset yellow in the concentration range from 0.3 to 8.0 μmol L − 1 , with a limit of detection (3 σ/k) of 79.6 nmol L − 1 . Furthermore the fluorimetric detection method was established and validated for sunset yellow in soft drinks samples with satisfactory results.
研究领域:
分析化学
·
食品科学
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DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Jiayu Zhang,Haiyan Qi,Tonghui Yi,Tao Jing,Ming Zhao,Jun Li,Maoxia Ran,Xiaochen Zhu,Chao Luo
A highly sensitive ultra-small ratiometric fluorescence nanosphere probe was successfully manufactured to detect Sunset Yellow (SY). The probe, CMCS@N, S-CDs/Rh6G, was formed through the encapsulation of N, S-CDs and Rh6G within carboxymethyl chitosan (CMCS) through in situ cross-linking. Remarkably, our nanosphere probe had an average grain diameter of 6.80 nm and exhibited excellent dispersibility without the need for additional solvents. The probe exhibited a strong linear relationship with SY concentration in the range of 0.26–100 μM, with a low detection limit of 0.078 μM. Furthermore, SY demonstrated strong fluorescence quenching capability on our nanosphere probe, with the fluorescence quenching mechanism involving a combined effects of inner filter effect (IFE) and static quenching. Notably, our nanosphere probe retained the bacteriostatic properties of CMCS , with a substantial bacteriostasis rate of 77.58 %, introducing novel potential applications.
研究领域:
分析化学
·
食品科学
·
材料科学
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DOI
PubMed
高影响因子
npj Science of Food
·
2026
·
IF 9.7
Wei Dingjun,Ye Ye,Huang Qiang,Deng Mingchan,Feng Xue,Madjirebaye Philippe,Fan Yuting,Huang Yike,Wu Xuli
Emerging evidence from clinical and experimental studies has suggested potential associations between artificial food pigments like Sunset Yellow (SY) and allergic reactions, though their mechanistic contributions remain unclear. This study investigated the immunological and epithelial effects of the synthetic pigment SY using a translational approach integrating mouse model assays. In the in vivo model, SY co-administration significantly exacerbated allergic responses, manifesting as enhanced weight loss, diarrhea, and elevated levels of histamine, MCP-1, and OVA-specific immunoglobulins (IgE and IgG). SY exposure promoted pronounced Th2 polarization, characterized by increased IL-4, IL-5, and IL-13 production alongside suppressed IL-2 levels, while maintaining comparably low levels of IFN-γ, TGF-β, and IL-10. Histopathological analyses revealed severe intestinal barrier damage and epithelial disruption. Complementary in vitro studies demonstrated that SY enhanced IL-1β secretion and subsequently downregulated tight junction proteins (ZO-1, Claudin-1). Mechanistically, SY was associated with activation of the MEKK1/IKK/NF-κB signaling pathway, establishing a self-amplifying inflammatory cycle that compromises epithelial integrity. These findings elucidate a multifaceted mechanism by which synthetic colorants may exacerbate allergic inflammation, underscoring the need to reconsider their safety assessment in food regulatory frameworks.
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高影响因子
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