JOURNAL OF FLUORESCENCE
·
2024
·
IF 2.6
Zhu RongGui,Jin Lei,Yang Bing,Ma Yuan,Zhou You,Xiao RongDan,Meng YiJie,Hou Ye,Xie BenTing,Jiang Xiu Juan
A green, economical and simple method for the preparation of water-soluble, high-fluorescent carbon quantum dots (CQDs) has been developed via hydrothermal process using pomelo peels as carbon source. The synthesized CQDs were characterized by transmission electron microscopy (TEM), X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FTIR), UV − vis absorption spectra and fluorescence spectrophotometer. The results reveal that the as-prepared C-dots were spherical shape with an average diameter of 2.64 nm and emit bright blue photoluminescence (PL) with a quantum yield of approximately 3.63%. The surface of the C-dots was rich in hydroxyl groups and presented various merits including excellent photostability, low toxicity, and satisfactory solubility. Additionally, we found that two widely used synthetic food colorants, tartrazine and sunset yellow, could result in a strong fluorescence quenching of the C-dots, The possible mechanisms are caused by different ratios of inner filter and static quenching effects. According to this property, This study attempts to establish an analytical method for the determination of tartrazine and sunset yellow using carbon quantum dots as fluorescent probe. A linear relationship was found in the range of 0-100 µM tartrazine and sunset yellow with the detection limit(3σ/k) of 0.65 nM and 1.7 nM. The relative standard deviation (RSD) was 3.5% (tartrazine) and 3.0% (sunset yellow).This observation was further successfully applied for the determination of tartrazine and sunset yellow in food samples collected from local markets, and the recovery rates of the two ranges from 79% to 117.8 and 81 -103.5%, respectively. suggesting its great potential toward food routine analysis.
研究领域:
食品科学
·
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2013
·Vol. 160
·期 8
·H459
·
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
✓ 已验证
DOI
高影响因子
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.
研究领域:
分析化学
·
纳米技术
·
食品检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Yajun Gao,Tingting Li,Tianyuan Zhang,Meiling Wang,Lu Gao,Zhenquan Yang,Zhanjun Yang
The content of sunset yellow (SY) in food must be strictly controlled, because its excessive intake may cause many adverse health effects. Herein, we proposed an ultrasensitive SY sensor by using hierarchical porous graphitic (HPG) carbon derived from polyaniline hydrogel. After a first step of polymerization, the HPG carbon was prepared through carbonization and further chemical activation. In particular, the activation process endowed the HPG carbon with a high content of optimized porous architecture (sub-nanoporous surface area accounts for more than 90% of microporous surface area), and thus providing a structural basis for high efficiency of SY pre-concentration on HPG carbon surface. Therefore, the proposed sensor showed record-high sensitivity (5285.7 A M −1 cm −2 ) and ultra-low detection limit (0.15 nM), which represents a performance improvement in SY sensing. Furthermore, the sensor displays excellent selectivity, reproducibility and stability, exhibiting a great perspective in ultrasensitive monitoring of SY in commercial products.
研究领域:
食品科学
·
材料科学
·
分析化学
✓ 已验证
DOI
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.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2017
·
IF 2.435
Mingwei Shi,Yuyao Zhang,Mengdi Bai,Baoming Li
Polyaniline (PANI) with coral-like nanostructure was prepared via chemical oxidative polymerization in the presence of sunset yellow (SY) as dopant and surfactant. The results showed that in comparison with the microsized bulky structure of PANI undoped with SY, the coral-like nanostructure of PANI doped with SY (PANI/SY) was observed and the diameter of coral branch decreased from 180 nm to 100 nm with the increase of feeding molar ratio of SY to aniline. Coral-like PANI/SY showed the large specific capacitance of 467 F/g and nice electrochemical stability when the feeding molar ratio of SY to aniline was 0.035:1, owning to its special coral-like nanostructure and high conductivity of 15.0 S/cm, which was essentially attributed to the synergistic effects of high doping level, ordered arrangement of PANI chain and strong π–π interaction between PANI and SY.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
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.
研究领域:
分析化学
·
食品科学
·
材料科学
✓ 已验证
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
✓ 已验证
DOI
PubMed
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.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
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.
研究领域:
材料科学
·
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jingru Huang,Haiyan Zhao,Na Li,Min Cui,Cong Zhang
Sunset yellow(SY) is a synthetic azo food dye, which is extensively utilized in the food processing industry. Nevertheless, its potential detrimental impacts on human health necessitate meticulous consideration. Consequently, the development of a user-friendly and rapidly responsive assay for the monitoring and analysis of SY in food products is of utmost importance. This study introduces an innovative electrochemical sensor based on polyoxometalates decorated with polypyrrole and multi-walled carbon nanotubes [Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs] for SY detection. The Co 4 (PW 9 O 34 ) 2 composite was prepared by using the nitrogen-containing ligand (1,4-bis (1-imidazolyl) butane) and the conductive polypyrrole was coated on Co 4 (PW 9 O 34 ) 2 , which avoided the solution of polyoxometalates in the electrolyte and improved the electrochemical stability. Multi-walled carbon nanotubes was employed to further enhance electron transfer rate. Research has shown that Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs exhibits superior electron transfer rates and remarkable electrocatalytic activity, which significantly amplify the oxidation signal of SY. Under optimal experimental conditions, the established detection range for SY is 10–1150 μM, with a detection limit of 0.425 μM. Additionally, the Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs modified electrode has good anti-interference and stability. The Co 4 (PW 9 O 34 ) 2 @PPy-MWCNTs modified electrode was successfully applied to detect SY in Fanta with yielding recovery rates between 97.79 % and 101.48 %, demonstrating substantial application potential as an effective means for SY detection.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）