Chemosensors
·
2020
·Vol. 8
·期 3
·70
·
IF 3.108
Zirong Qin,Jinyan Zhang,Ying Liu,Jingtao Wu,Guangli Li,Jun Liu,Quanguo He
In this work, we report a simple but efficient voltammetric sensor for simultaneous detection of ponceau 4R and tartrazine based on TiO2/electro-reduced graphene oxide nanocomposites (TiO2/ErGO). TiO2/ErGO nanocomposites were prepared by ultrasonically dispersing TiO2nanoparticles (TiO2NPs) into graphene oxide (GO) solution followed by a green in-situ electrochemical reduction. TiO2NPs were uniformly supported on ErGO nanoflakes, which provides a favorable interface for the adsorption and subsequent oxidation of target analytes. TiO2/ErGO showed remarkable electrocatalytic capacity for the oxidation of ponceau 4R and tartrazine, with minimized oxidation overpotentials and boosted adsorptive striping differential pulse voltammetric (AdSDPV) response peak currents. Under the optimal experimental conditions, the anodic peak currents of ponceau 4R and tartrazine increase linearly with the respective natural logarithm of concentrations from 0.01 to 5.0 μM. The detection limits (LOD = 3σ/s) for ponceau 4R and tartrazine are 4.0 and 6.0 nM, respectively. The extraordinary analytical properties of TiO2/ErGO/GCE are primarily attributed to the synergistic enhancement effect from ErGO nanoflakes and TiO2NPs. Moreover, the proposed TiO2/ErGO/GCE achieves reliable determination of ponceau 4R and tartrazine in orange juice with excellent selectively, reproducibility and stability. Together with simplicity, rapidness, and low cost, the proposed sensor demonstrates great potential for on-site detection of azo colorants.Keywords:ponceau 4R;tartrazine;TiO2;electro-reduced graphene oxide;voltammetric sensor
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高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Jingjuan Wang,Juan Wu,Mimi Sun,Jing Bai,Xiangjie Bo
This study presents the first integrated electrochemical platform (IEP) with point-of-use and portable features for on-site determination of ponceau 4R (RP), amaranth (AM), and tartrazine (TZ) in food by integrating a mass-producible Pt nanoparticles/laser-engraved graphene (Pt NPs/LEG)-based sensing chip and a reusable electrochemical miniaturized workstation. The sensing chip utilizes Pt NPs/LEG with unique architectures as electrode material and exhibits desirable analytical performance towards RP, AM, or TZ with satisfied linear range (0.25–50 μM for RP, AM, and TZ), high sensitivity (7.29 μA μM −1 cm −2 , 7.18 μA μM −1 cm −2 , and 2.02 μA μM −1 cm −2 for RP, AM, and TZ, respectively) and low limit of detection (50 nM, 58 nM, and 204 nM for RP, AM, and TZ, respectively). The sensing chip shows excellent selectivity, high stability, outstanding reproducibility, and acceptable mechanical stability. IEP can be implemented to test RP, AM, or TZ in real samples with satisfactory accuracy and recoveries.
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PubMed
高影响因子
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.
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Foods
·
2026
·Vol. 15
·期 15
·2668
·
IF 6
Mingwan Liu,Zhuhua Gong,Zhenghang Guo,Yu Yu,Shuangshuang Bai,Qi Zhang,Qinhong Liao,Hongjia Lu,Honglei Li,Yuming You,Wenlin Zhang
Food industry wastewater containing synthetic dyes threatens ecological safety and human health. Therefore, efficient and environmentally friendly adsorbents that can remove synthetic food dyes from wastewater are urgently needed. In this work, a self-nitrogen-doped biochar (GSNBC), used for adsorption of food dyes including carmine and tartrazine, was facilely prepared by employing ginger straw waste as the carbon precursor and NaHCO3as a mild and relatively benign pore-forming agent via one-step pyrolysis. The as-prepared GSNBC featured well-developed porous structures, a specific surface area of 1712.52 m2g−1, and rich oxygen- and nitrogen-containing functional surface groups. Particularly, GSNBC performed ultrafast adsorption, with approximately 90% of the equilibrium capacity within 1 min (600.13 mg g−1and 580.24 mg g−1for carmine and tartrazine, respectively), and reached adsorption equilibrium at about 10 min. In addition, it exhibited excellent regenerability. The adsorption kinetics and isotherms fit well with pseudo-second-order and Langmuir models. DFT calculations indicated that π–π stacking and hydrogen bonding were mainly responsible for the adsorption. This study presents not only a promising and efficient adsorbent for the remediation of dye-laden food industry wastewater but also a sustainable route for the resource utilization of ginger straw waste.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Limin Wu,Yufeng Xu,Xixi Lv,Xulu Chang,Xiao Ma,Xue Tian,Xi Shi,Xuejun Li,Xianghui Kong
Food dyes, or color additives, are often added into foods, cosmetics and beverages during processing to improve the sensory attributes of the final products. However, the toxicity of tartrazine (TZ), one of the most common azo-dyes, is still unclear, and needs to be ascertained by further study. Hence, in the present study, we aimed to evaluate the effects of TZ consumption on health by using a teleost, crucian carp ( Carassius auratus ) as the experimental fish. TZ consumption (1.4, 5.5 and 10 mg/kg bwt/day) could cause severe histopathological and cellular alterations in intestine and liver. The height of intestinal villus, thickness of intestinal muscle, and microvilli density were also affected. With the increasing of TZ concentrations, the activities of antioxidant enzymes (CAT, SOD and GSH-Px), exhibited a decreasing trend, while the contents of MDA elevated. Upregulations of pro-inflammatory cytokines ( il6 and tnfα ), anti-inflammatory cytokines ( il8, and il10 ) and other immune related genes (complement component 3 ( c3 ), lysozymes ( lyz ), β-defensin 3 ( defb3 )), were observed after TZ uptake. In addition, TZ consumption also affected the community structure of the microbiota in the intestine of crucian carp. The amount of some probiotic bacteria ( Roseomonas, Rhodococcus and Bacillus ) and the bacteria ( Bacteroides and Clostridium ), producing short chain fatty acids, were significantly reduced, and some pathogenetic microorganisms (e.g. Bdellovibrio and Shewanella ) were significantly increased after TZ uptake. In summary, the data in the present study indicate that TZ consumption, even at a low concentration, may lead to adverse effects on fish health. Therefore, in aquaculture, it is necessary to be informed about the hazardous effects of TZ, and more attentions should be focused on using natural substitutes.
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高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Shiqing Luo,Xiaojie Sun,Lifang Zhang,Yanming Miao,Guiqin Yan
The photoluminescent properties of Mn-doped ZnS quantum dots were fully exploited, and room-temperature phosphorescence (RTP)-ratiometric fluorescence (RF) magnetic mesoporous molecularly imprinted polymers (PFMM-MIPs) were prepared by integrating molecular imprinting technology. RTP was used to detect malachite green (MG). The fluorescence at 420 nm and the peak at 590 nm in the fluorescence mode were used as the response reference signals respectively to detect tartrazine (TZ). The linear responsive range and detection limit of MG were 0.01–150 μM and 4.3 nM, and these of TZ were 0.05–80 μM and 23.7 nM. RTP, which can avoid the interference of background fluorescence, and RF with self-calibration ability can both largely weaken the matrix effect. This work enables single-probe-type MIPs to achieve dual-target analysis via RTP and RF. This method provides excellent sensitivity, specificity, recovery and recyclability, and is expected to be prospectively applied in the fields of food, environment and biological analyses.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Cuiyun Liu,Menghui Zhao,Hui Liu,Jun Zhang,Zihao Hu,Yuhan Zhang,Xinchang Pang
Tartrazine (TAR), widely used as a synthetic food dye, and U(VI), primarily originating from nuclear industry effluents, pose serious environmental and health risks due to their toxicity and persistence. However, many existing adsorbents suffer from low capacity, poor stability, and limited reusability. Herein, A bio-based aerogel adsorbent (NDC) with a stable three-dimensional porous network structure was prepared through a Schiff base reaction between dialdehyde-functionalized nanocellulose fibrils (DNCFs), chitosan (CS), and aminated metal–organic frameworks (MOFs). The synergistic effect of MOFs , DNCFs, and CS resulted in high adsorption capacities of 689.66 mg/g for TAR and 285.72 mg/g for U(VI) at a temperature of 303 K, respectively. Additionally, the Schiff base chemical bonds firmly anchored the MOFs in the NDC aerogel, providing a compressive strength of 547.4 kPa at 70 % strain. Furthermore, due to the antibacterial properties of the amino groups on CS and MOFs, the NDC aerogel demonstrated excellent anti-biofouling performance. The results suggest that bio-based NDC aerogel is an efficient and prospective for the removal of TAR and U(VI) from wastewater as an adsorbent.
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高影响因子
Food Analytical Methods
·
2016
·Vol. 10
·期 1
·200-209
·
IF 2.167
Yu Lanlan,Zheng Huijun,Shi Mengxing,Jing Shasha,Qu Lingbo
A new and sensitive electrochemical sensor for simultaneous determination of sunset yellow and tartrazine was constructed by poly (diallyldimethylammonium chloride) (PDDA)-dispersed graphene (Gr) and palladium nanoparticle (Pd NP) composite. The PDDA-Gr-Pd composite displayed good selectivity and high sensitivity to the targets, which were ascribed to the synergistic effect of the large surface area and good electron transfer efficiency of both Gr and Pd NPs. The electrochemical properties of sunset yellow and tartrazine on the modified electrode were investigated by cyclic voltammetry and differential pulse voltammetry. Under the optimum experimental conditions, the peak currents were linear with the concentrations of sunset yellow and tartrazine in the ranges of 0.01–10.0 and 0.05–8.0 μmol L −1 , respectively. The limit of detection (LOD) was 2.0 and 5.0 nmol L −1 for sunset yellow and tartrazine, respectively. The developed simple and sensitive method was successfully applied for simultaneous determination of sunset yellow and tartrazine in soft drinks with satisfactory results.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Xiaoliang Ye,Yongling Du,Daban Lu,Chunming Wang
We proposed a green and facile approach for the synthesis of β-cyclodextrin-coated poly(diallyldimethylammonium chloride)-functionalized graphene composite film (β-CD-PDDA-Gr) by using l -ascorbic acid ( l -AA) as the reducing agent at room temperature. The β-CD-PDDA-Gr composite film modified glassy carbon-rotating disk electrode (GC-RDE) was then developed for the sensitive simultaneous determination of two synthetic food colorants: sunset yellow (SY) and tartrazine (TT). By cyclic voltammetry (CV), the peak currents of SY and TT increased obviously on the developed electrochemical sensor. The kinetic parameters, such as diffusion coefficient D and standard heterogeneous rate constant k b , were estimated by linear sweep voltammetry (LSV). Under the optimal conditions, the differential pulse voltammetry (DPV) signals of SY and TT on the β-CD-PDDA-Gr modified GC-RDE were significantly enhanced. The enhanced anodic peak currents represented the excellent analytical performance of simultaneous detection of SY and TT in the range of 5.0 × 10 −8 to 2.0 × 10 −5 mol L −1 , with a low limit of detection (LOD) of 1.25 × 10 −8 mol L −1 for SY and 1.43 × 10 −8 mol L −1 for TT (S N −1 = 3). This proposed method displayed outstanding selectivity, good stability and acceptable repeatability and reproducibility, and also has been used to simultaneously determine SY and TT in some commercial soft drinks with satisfactory results. The obtained results were compared to HPLC of analysis for those two colorants and no significant differences were found. By the treatment of the experimental data, the electrochemical reaction mechanisms of SY and TT both involved a one-electron-one-proton-transfer process.
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高影响因子
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