Desalination and Water Treatment
·
2024
·
IF 1
Lichun Fu,Tao Jin,Ruixuan Hu,Yuwei Pan,Yingjie Zhao
In recent years, dye wastewater caused serious effects on environmental ecology and human health. Thus, in the present study, hydroxylamine (HA) was used to improve the Fe 3 O 4 /H 2 O 2 process for removing the typical dye pollutant (tartrazine). Only 2.8% tartrazine could be removed in Fe 3 O 4 /H 2 O 2 system within 60 min at the reaction of 1 g/L Fe 3 O 4 , 1 mM H 2 O 2 , and pH 4 while 97.5% tartrazine could be removed within 20 min after adding 1 mM HA into the Fe 3 O 4 /H 2 O 2 system. Compared with Fe 3 O 4 /H 2 O 2 system, the removal rate for removing tartrazine in Fe 3 O 4 -HA/H 2 O 2 system could enhance more than 100 times. Electron paramagnetic resonance tests (EPR), radical quenching experiments and quantitative determination demonstrated that • OH was the major reactive species for removing tartrazine in Fe 3 O 4 -HA/H 2 O 2 system and • OH produced concentration in Fe 3 O 4 -HA/H 2 O 2 system was also much higher than that in Fe 3 O 4 /H 2 O 2 system. The key factors affecting tartrazine removal in Fe 3 O 4 -HA/H 2 O 2 system were also conducted. The optimal HA dosage, Fe 3 O 4 dosage, and H 2 O 2 dosage was 1 mM, 1 g/L and 1 mM. The optimal initial pH in Fe 3 O 4 -HA/H 2 O 2 system was 3, but compared with Fe 3 O 4 /H 2 O 2 system, the tatrazine removal efficiency could significantly improve under any initial pH condition. Fe 3 O 4 -HA/H 2 O 2 process had strong adaptability to inorganic ions and good applicability to different pollutants. Fe 3 O 4 -HA/H 2 O 2 process also exhibited good recycle ability for tartrazine removal. Overall, Fe 3 O 4 -HA/H 2 O 2 process is an effective and good practical applicability approach for dye wastewater treatment.
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FOOD CHEMISTRY
·
2020
·
IF 6.306
Shanshan Wu,Zheng-Zhi Yin,Xiaohui Chen,Xueqing Wang,Datong Wu,Yong Kong
Poly(melamine) (PMel) was synthesized via the electropolymerization of melamine monomer, which was then characterized by field-emission scanning electron microscopy (FESEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The possible polymerization mechanisms of melamine were also revealed by FT-IR spectroscopy and UV–Vis spectroscopy. Next, the PMel modified GCE (PMel/GCE) was used for the simultaneous determination of nitrite (NO 2 − ) and tartrazine, and the parameters were optimized. The kinetic study showed that the electrochemical oxidation of nitrite and tartrazine at the surface of PMel/GCE is a typical surface-controlled electrode process. Under the optimun conditions, the developed sensor outperformed those previously reported, and it also exhibited high selectivity and reproducibility. Finally, the PMel/GCE was used for the simultaneous determination of nitrite and tartrazine in foodstuffs, and the results indicated that the proposed sensor could be a promising candidate for accurate determination of nitrite and tartrazine in real food samples.
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ACS Omega
·
2019
·
IF 2.584
Yubing Zhou,Yuancheng Qin,Weili Dai,Xubiao Luo
The roles of benzoic acid and its derivatives in the photocatalytic degradation of tartrazine (TZ) by titanium dioxide have been studied. A series of comparative experiments were carried out, such as the experimental comparisons of concentrations, pH values, effects on the para-position of benzoic acid, gas atmospheres, and different target pollutants. It should be noted that the degradation rate of TZ solution without benzoic acid and benzoic acid after degradation for 90 min was 28.69 and 99.08%, respectively. The reason for the above results is that benzoic acid acts as an electron donor to react with photogenerated holes, suppressing the recombination of photogenerated holes and electrons, and thus causing a significant increase in the degradation rate. Moreover, the degradation process is mainly induced by O2•– and photogenerated holes (h+). It is the first time that the benzoic acid/TiO2 system has been used to degrade the TZ dye. In addition, the benzoic acid/TiO2 system is also suitable for the degradation of other organic dyes such as methyl orange, rhodamine B, methylene blue, and methyl violet.
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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.
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Analytical Methods
·
2013
·Vol. 5
·期 4
·925-930
·
IF 1.855
Yajing Lei,Shujie Zhang,Lizheng Fang,Muhammad Sajid Hamid Akash,Weixing Shi,Kedan Sun,Yingchun Xu,Shuqing Chen
Tartrazine is commonly used in foodstuffs, its level is controlled by government, however, it is still used in some food products at levels which are not permitted. We aimed to develop a sensitive and simple method to assess the exposure to tartrazine in pregnant women and the general population in China. A competitive enzyme-linked immunosorbent assay (ELISA) was developed based on polyclonal antibodies for tartrazine. Using this assay, we measured the urinary concentrations of tartrazine in the participants. Under optimal experimental conditions, the standard curve was constructed at concentrations of 0.04–1000 ng mL−1 and the limit of detection (LOD) was set at 0.04 ng mL−1. No cross-reactivity of the antibody was observed with seven other artificial dyes based on this assay. Human blank urine was spiked with tartrazine at concentrations of 0.1, 25, 500 ng mL−1 and analyzed by ELISA, the recoveries of tartrazine were from 99.8% to 106.6% and coefficients of variation were from 3.28% to 14.9%. The study comprised of 351 volunteers (age: 19–69 years), of which 30% were male, 16% were nonpregnant women and 54% were pregnant women. The geometric means for tartrazine in three groups were 2.64, 2.44 and 3.21, respectively. No difference was observed in these groups. The values indicated that both the general population and pregnant women are exposed to tartrazine. Sources of exposure, potential health effects and risk assessment require further investigation.
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Materia-Rio de Janeiro
·
2024
·
IF 0.5
Dai Jun,Liu Yunzhao,Jiang Erhu
Tartrazine (Tz) is a widely used synthetic food colorant that has raised health concerns due to its potential adverse effects. Developing sensitive and reliable methods for Tz detection in food products is crucial for ensuring consumer safety. In this study, Sr-doped ZnO nanoparticles with varying doping levels (0–7 mol%) were synthesized by mechanical milling and applied as an electrochemical sensor for detecting Tz in sports drinks. The ZnO-Sr modified carbon paste electrode (CPE), with an optimal Sr doping level of 5 mol%, exhibited the best sensing performance under optimized conditions of pH 7.0 and an accumulation time of 180 s. The sensor demonstrated a linear range from 1 to 1000 μM, a detection limit of 0.3 μM, and a sensitivity of 0.38 μA/μM for Tz identification. This performance surpasses that of many previously reported electrochemical Tz sensors. The ZnO-Sr modified CPE showed good reproducibility (RSD 3.2%), long-term stability (91.2% current retention after one month), and high selectivity against common interferents. The sensor’s practical applicability was validated by determining Tz in commercial sports drink samples, with results in good agreement with a standard UV-Vis spectrophotometric method (relative errors < 5%). Recovery tests (97.2–103.5%) further confirmed the accuracy and reliability of the proposed sensor. This work presents a simple, sensitive, and reliable approach for monitoring Tz levels in food products, addressing important food safety and human health concerns.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 8
·1-9
·
IF 5.7
Zhao Yijian,Zheng Weilian,Liao Mengyu,Zhou Shuai,He Weiheng,Liu Ming,Yao Zhiyi
A cationic perylene probe was designed and synthesized for sensitive determination of tartrazine. In the presence of tartrazine, the fluorescence of the perylene probe was quenched by efficient supramolecular self-assembly of the perylene derivate. The quenching is caused by the synergistic effect of noncovalent interactions including static electricity, π-π stacking, and hydrophobic interaction. Benefiting from these advantages, the probe exhibited excellent sensing performance to tartrazine within 2 min. The detection and quantification limit of tartrazine are as low as 2.42 and 8.07 nmol L −1 , respectively, with a wide linear operation range from 15 to 500 nmol L −1 . Most importantly, due to the high binding affinity (3.22 × 10 7 mol L −1 ) between the perylene probe and tartrazine, the sensing system shows great anti-interference capacity. Subsequently, the visualization application of the approach was evaluated by portable device, and the limits of detection for visual detection for test strip, membrane, and hydrogel were 0.5, 0.5, and 5 μmol L −1 , respectively. The approach has been applied to monitor tartrazine in various food condiments with recoveries in the range 91.29–108.83%. As far as we know, this is the first report of using perylene-based probe for tartrazine determination, offering a promising strategy for the construction of perylene-based detection system in the field of food safety. Graphical Abstract
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2015
·
IF 2.912
Hua Xu,Xiupei Yang,Gu Li,Chuan Zhao,Xiangjun Liao
A simple, economical, and green method for the preparation of water-soluble, high-fluorescent carbon quantum dots (C-dots) has been developed via hydrothermal process using aloe as a carbon source. The synthesized C-dots were characterized by atomic force microscope (AFM), transmission electron microscopy (TEM), fluorescence spectrophotometer, UV–vis absorption spectra as well as Fourier transform infrared spectroscopy (FTIR). The results reveal that the as-prepared C-dots were spherical shape with an average diameter of 5 nm and emit bright yellow photoluminescence (PL) with a quantum yield of approximately 10.37%. The surface of the C-dots was rich in hydroxyl groups and presented various merits including high fluorescent quantum yield, excellent photostability, low toxicity and satisfactory solubility. Additionally, we found that one of the widely used synthetic food colorants, tartrazine, could result in a strong fluorescence quenching of the C-dots through a static quenching process. The decrease of fluorescence intensity made it possible to determine tartrazine in the linear range extending from 0.25 to 32.50 μM, This observation was further successfully applied for the determination of tartrazine in food samples collected from local markets, suggesting its great potential toward food routine analysis. Results from our study may shed light on the production of fluorescent and biocompatible nanocarbons due to our simple and environmental benign strategy to synthesize C-dots in which aloe was used as a carbon source.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 10
·4756-4761
·
IF 3.925
Liping Lin,Qiaoling Zheng,Qiushuang Chen,Meng Fang,Qingjiao Lai,Xinghao He,Jinying Qin,Zu-jin Lin,Rongguang Lin
Fluorescent polydopamine nanoparticles (PDA NPs) have been effectively synthesized by means of self-polymerization of dopamine under the strong alkaline condition of ethylenediamine at room temperature for 2.5 h. The obtained PDA NPs displayed excellent optical properties under the conditions of high ion strength and wide pH range. Utilizing the fluorescent signal of PDA NPs, a fluorescence turn-off sensor for tartrazine detection is proposed. The fluorescence signal changes linearly depending on the tartrazine concentration range of 1.5–45 μM, and a detection limit of 0.55 μM was obtained. The mechanism studies showed that the fluorescence quenching procedure is ascribed to the combined effects of the inner filter and the generation of non-fluorescent ground state complexes between PDA NPs and tartrazine via strong electrostatic interactions. The satisfactory results of the proposed sensor when applied to tartrazine detection in soft drinks and candies promise its practicality for real food samples.
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CRYSTENGCOMM
·
2025
·
IF 2.6
De-Sheng Wei,Jian Li,Ting-Ting Xu,Wan-Yi Lan,Nan Lv,Yu-Teng Zhang,Shuang-Bao Li
Fast ultrasound-assisted processes were utilized for the first time, to achieve the successful synthesis of two highly crystalline Zr-based metal-organic cages, namely ZrT-1 and ZrT-1-OH. Varying temperature and power level, the desired product was obtained after 5-8 minutes as crystalline particles with cubic shape (ca.2-8 μm). Furthermore, ultrasound-assisted synthesized ZrT-1 and ZrT-1-OH demonstrated exceptional performance for tartrazine adsorption. Under optimal conditions, their maximum adsorption capacities were determined to be 238.6 mg/g and 225.3 mg/g, respectively.
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JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2022
·
IF 0.243
Haijian Liu,Zhenxiang Li,Wei Zhang,Ying Liu,Rongkai Pan,Guofu Huang
Carbon nanodots (CDs) with superior fluorescence performance were obtained by hydrothermal method using tomatoes as raw materials. When the ultraviolet absorption band of tartrazine and the fluorescence spectrum of CDs have complementary overlaps, the fluorescent internal filter effect (IFE) occurred. Furthermore, the degree of quenching of fluorescence intensity of CDs has an excellent linear correlation with tartrazine concentration. And based on this principle, a method for detecting tartrazine was established. As the decrease of fluorescence intensity, tartrazine can be measured in the linear range of 0.1 μM–40 μM. The detection limit is 39 nM, and the recovery rate is 90.7%∼114.5%. The established protocol was also effectively employed to assay tartrazine in beverage samples, indicating that it has great potential for food color analysis.
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PLoS One
·
2020
·Vol. 15
·期 3
·e0230410
·
IF 2.74
Jin Dong Cho,Jaeman Son,Chang Heon Choi,Jin Sung Kim,Hong-Gyun Wu,Jong Min Park,Jung-in Kim
We investigated the influence of incorporating tartrazine on the dose response characteristics of radiochromic 3D dosimeters based on polyurethane resin. We use three types of polyurethane resins with different Shore hardness values: 30 A, 50 A, and 80 D. PRESAGE dosimeters are fabricated with different chemical components and concentrations. Tartrazine (Yellow No. 5) helps incorporate a yellow dye to fabricate the dosimeter. Elemental composition is analyzed with the Z eff . Three sets of six different PRESAGE dosimeters were fabricated to investigate the effects of incorporating yellow dye on the dose response characteristics of the dosimeter. The dose response curve was obtained by measuring the optical absorbance using a spectrometer and optical density using optical CT, respectively. The energy and dose rate dependences are evaluated for the dosimeter with the highest sensitivity. For the optical density measurement, significant sensitivity enhancements of 36.6% and 32.7% were achieved in polyurethane having a high Shore hardness of 80 D and 50 A by incorporating tartrazine, respectively. The same results were obtained in the optical absorbance measurements. The ratio of the Z eff of the dosimeter with 80 D Shore hardness to water was 1.49. The polyurethane radiochromic dosimeter with a Shore hardness of 80 D showed the highest sensitivity and energy and dose rate independence upon the incorporation of tartrazine.
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