MOLECULES
·
2024
·Vol. 29
·期 8
·1836
·
IF 4.2
Guiling Chen,Yitong Yin,Xianting Zhang,Andong Qian,Xiaoyang Pan,Fei Liu,Rui Li
To develop valuable applications for the invasive weed Palmer amaranth, we utilized it as a novel biochar source and explored its potential for methyl orange adsorption through the synthesis of chitosan-encapsulated Palmer amaranth biochar composite microspheres. Firstly, the prepared microspheres were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy and were demonstrated to have a surface area of 19.6 m2/g, a total pore volume of 0.0664 cm3/g and an average pore diameter of 10.6 nm. Then, the influences of pH, dosage and salt type and concentration on the adsorption efficiency were systematically investigated alongside the adsorption kinetics, isotherms, and thermodynamics. The results reveal that the highest adsorption capacity of methyl orange was obtained at pH 4.0. The adsorption process was well fitted by a pseudo-second-order kinetic model and the Langmuir isotherm model, and was spontaneous and endothermic. Through the Langmuir model, the maximal adsorption capacities of methyl orange were calculated as 495.0, 537.1 and 554.3 mg/g at 25.0, 35.0 and 45.0 °C, respectively. Subsequently, the adsorption mechanisms were elucidated by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy investigations. It is indicated that electrostatic interactions, hydrogen bonding, π–π interactions and hydrophobic interactions between methyl orange and the composite microspheres were pivotal for the adsorption process. Finally, the regeneration studies demonstrated that after five adsorption–desorption cycles, the microspheres still maintained 93.6% of their initial adsorption capacity for methyl orange. This work not only presents a promising method for mitigating methyl orange pollution but also offers a sustainable approach to managing Palmer amaranth invasion.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
·
2018
·Vol. 73
·期 8
·817-823
·
IF 0.971
Hu Q. Q.,Gao H.,Wang Y. M.,Ma W.,Sun D. M.
Abstract The poly(L-arginine)–graphene modified glassy carbon electrode ( GCE ) was fabricated and the electrochemical behavior of carmine and amaranth on this electrode was studied by cyclic voltammetric method. Compared with poly(L-arginine)/GCE and GCE, the poly(L-arginine)–graphene modified GCE improved the sensitivity for the determination of carmine and amaranth. The experimental results indicated that the oxidation peaks of carmine and amaranth were separated at 121 mV in phosphate buffer solution at pH 2.5. The linear range for the simultaneous determination of carmine and amaranth were 7.5 × 10 –7 –7.5 × 10 –5 M. The detection limits were 7 × 10 –8 M for carmine and 2.5 × 10 –7 M for amaranth. The method has been applied to the simultaneous determination of carmine and amaranth in drinks with satisfactory results.
研究领域:
分析化学
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食品科学
·
电化学
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jian-Ling He,Wei Kou,Cheng Li,Juan-Juan Cai,Fen-Ying Kong,Wei Wang
Currently, as food additives, synthetic colourants have been drawn much attention. This paper studied the electrocatalytic oxidation of amaranth (AM), with a novel electrochemical sensor based on singlewalled carbon nanotube-Titanium nitride (SWCNT-TiN) nanocomposites modified glassy carbon electrode. Owing to the high accumulation effect and great catalytic capability of SWCNT-TiN nanocomposites, the developed sensor exhibited well-defined voltammetric peaks for AM. The peak currents of AM increased linearly with its concentration in the ranges of 0.1-100 μM. The detection limit is 40 nM. The developed sensor was successfully applied in the determination of AM in beverage samples. Results indicated that the developed sensor was fast, sensitive and reliable.
研究领域:
食品科学
·
材料科学
·
分析化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 5
·306
·
IF 5.4
Zhu Yuchuan,Li Junhong,Yang Ruoxi,Bao Mingqiu,Hao Yakai,Chen Huijin,Yue Ruirui,Shu Jinbing,Duan Xuemin
A ternary nanocomposite, PEDOT:PSS/UiO-66-Cl@Ru, was successfully synthesized via a one-pot hydrothermal strategy for the ultrasensitive electrochemical detection of amaranth (AM) and Allura Red (AR). The conceptual advance of this work lies in the synergistic integration of halogen-induced intrinsic electroactivity, maximal atomic utilization of single-atom Ru, and the conductive bridging effect of PEDOT:PSS. This ternary design effectively overcomes the conductivity bottleneck of MOFs while delivering exceptional catalytic site density and enhanced interfacial stability. The resulting PEDOT:PSS/UiO-66-Cl@Ru platform delivered remarkable analytical performance, featuring wide linear ranges of 0.05–140 µM for AM and 0.07–50 µM for AR. The low limits of detection were 16.6 nM and 23.3 nM, with high sensitivities of 0.179 µA µM⁻¹ cm⁻² and 0.247 µA µM⁻¹ cm⁻² for AM and AR, respectively. Furthermore, the proposed sensor demonstrated excellent selectivity, reproducibility, and stability. Finally, the successful application of PEDOT:PSS/UiO-66-Cl@Ru in detecting AM and AR within beverage samples validates its practical utility for on-site food safety screening.
Section
Graphical abstract
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-11
·
IF 5.3
Li Ruidan,Tian Li,Song Yujia,Guo Yanjia,Ma Guangping,Han Pengfei,Jiang Hanyue,Wang Wenzhuo,Lu Juan
The synthesis of self-supporting material ZnMnO₂ by electrospinning and high-temperature calcination is reported. A highly sensitive electrochemiluminescence (ECL) sensor for Amaranth Red (AR) detection was constructed using Luminol@Ti₃AlC₂ and ZnMnO₂ with multi-step signal amplification. Luminol-O 2 served as the ECL probe with luminescent signal originating from its reaction with dissolved oxygen. Ti₃AlC₂ was introduced as the carrier to enhance the effective concentration of the ECL reagent and improve the signal. ZnMnO 2 as the co-reaction promoter could further improve the ECL value. The highest signal was attributed to the combined catalytic action of Luminol@Ti 3 AlC 2 and ZnMnO 2 . A new method for the detection of AR was developed due to the resonance energy transfer (RET) between Luminol and AR. Under optimal conditions, the response to AR exhibited a linear range from 5.0 × 10 −15 to 5.0 × 10 −5 mol·L −1 . The sensor achieved satisfactory AR detection in candy samples. Graphical
研究领域:
分析化学
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材料科学
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电化学
·
传感器技术
·
纳米技术
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xiaofang Tian,Meijie Xie,Xinyu Luo,Boyan Zheng,Yongxia Ao,Jiaxin Liu,Mei Wang,Qianchun Zhang,Yun Wu
The detection of food pigments is essential for ensuring food quality and safety. This study presents the efficient preparation of fluorine-doped carbon quantum dots (F-CQDs) through a simple solvothermal reaction using Zanthoxylum and NH 4 F as precursors. The resulting F-CQDs displayed optimal fluorescence characteristics, along with a quantum yield of 4.81 %. Notably, the as-prepared F-CQDs exhibited excellent photostability and were effectively quenched by amaranth, demonstrating their potential as reliable probes for amaranth detection. The probe showed a strong linear response ( R 2 = 0.9992) to amaranth concentrations of 0.15–75 μM, yielding a limit of detection as low as 50 nM. Validation tests across various food matrices, including bayberry, a sugar-sweetened beverage, and candies, yielded good recovery rates of 89.0 %–119 % and a relative standard deviation of less than 4.9 % ( n = 5), indicating high reliability. These findings suggest that F-CQDs are viable candidates for detecting amaranth in foods, which can help enhance food safety and quality control.
研究领域:
食品科学
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分析化学
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纳米技术
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荧光光谱学
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产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Qianchun Zhang,Jiaxin Liu,Yongxia Ao,Fengling Tian,Xiaofang Tian,Xinyu Luo,Meijie Xie
Red-emissive carbon dots (CDs) play a crucial role in various food detection applications due to their strong fluorescence in the red luminescence region. Typically, nitrogen-doped CDs are synthesized from diverse precursors and predominantly emit blue fluorescence, which limits their advancement. In this study, we developed an efficient strategy to synthesize novel red-emissive nitrogen-doped carbon dots (R-NCDs) from L-malic acid and urea using a simple solvothermal approach. The synthesized R-NCDs exhibited optimal excitation and emission wavelengths of 540 nm and 630 nm, respectively, and achieved a quantum yield of 14.3 %. Additionally, the fluorescence of the R-NCDs was effectively quenched by the food coloring agent amaranth, allowing for a linear range of 0.050–75 µM and a detection limit of 15 nM. Furthermore, we established a new and efficient fluorescence detection platform capable of detecting trace amounts of amaranth in soda, fruit gummies, hard candies, vodka, preserved fruits, juices, and cocktails, yielding recovery rates ranging from 88.0 % to 119 % with a relative standard deviation of 1.1–3.9 %. Notably, this study is unique as it presents the first synthesis of R-NCDs based on L-malic acid and urea for the detection of amaranth content in various food samples, emphasizing its novelty and significance.
研究领域:
食品科学
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材料化学
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分析化学
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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 2
·e202303816
·
IF 1.9
Qingqing Hu,Jianhua Kuang,Jingxue Yuan,Yao Feng,Zhengjun Cheng
Graphical Citric acid (CA) and N-[3-(trimethoxysilyl)propyl]ethylenediamine (TPED) were dissolved in formamide to prepare carbon dots (CDs) by a microwave-assisted method. The obtained CDs were further modified with 3,5-dichloro-2-hydroxybenzaldehyde. The modified CDs (G-CDs) showed a new emission peak at 520 nm and a weaker emission peak at 450 nm; thus, a new ratiomeric fluorescence (RF) probe was obtained. The RF probe could be used for sensitively and selectively monitoring of amaranth AM and Fe 3+ . In this work, a new carbon quantum dots (CDs) was prepared though microwave assisted approach using citric acid anhydrous (CA) and N-[3-(Trimethoxysilyl)propyl] ethylenediamine (TPED) as raw materials. However, the CDs was not effective in actual sensing applications, so further modification of CDs was done by 3,5-Dichloro-2-hydroxybenzaldehyde (it was named as G-CDs). Fortunately, the modified CDs (G-CDs) has good selectivity for Fe 3+ and amaranth. Studies confirmed that Fe 3+ could quench the fluorescence of G-CDs by forming a complex, while the fluorescence quenching mechanism of G-CDs by amaranth (AM) mainly belonged to the internal filtering effect (IFE). A detection limit of 20.8 nM for Fe 3+ and 43.8 nM for AM were achieved. Moreover, the as-developed G-CDs probe was also successfully used to detect Fe 3+ and amaranth in real samples, and compared with their results by the standard method, hinting that the accuracy and reliability of the probe were highly satisfactory.
研究领域:
食品科学
·
分析化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Hualin Jiang,Pinghua Chen,Weibo Zhang,Shenglian Luo,Xubiao Luo,Chaktong (Peter) Au,Menglin Li
Herein we report a novel method to exfoliate graphite to thin structure by depositing nanoparticles. Graphite was oxidated to graphite oxide (GO), and then nano Fe 3 O 4 @mZrO 2 was loaded and inserted between GO sheets as GO being reduced to reduced graphite oxide (rGO) in one step by hydro-thermal co-precipitation. As-obtained nanocomposite Fe 3 O 4 @mZrO 2 /rGO was characterized by SEM, TEM, AFM, FT-IR, BET, XRD, VSM and EDX techniques. The microscopic studies show the thickness of Fe 3 O 4 @mZrO 2 /rGO sheet is significant thinner than that of rGO sheet. Evidences indicate the presence of nano Fe 3 O 4 @mZrO 2 effectively preserves rGO sheets from stacking and forming thick structure. Amaranth was used as a model contamination to investigate the adsorption ability of the nanocomposite due to its hazardness. It shows effective adsorption ability. Based on all the evidence shown in studies, a possible mechanism for the adsorbent composing and its amaranth adsorption was postulated.
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DOI
高影响因子
Plants-Basel
·
2025
·Vol. 14
·期 3
·454
·
IF 4.1
Huiying Xie,Jiajing Zeng,Wenli Feng,Wei Gao,Zhongxiong Lai,Shengcai Liu
Betalains differ from anthocyanins, and they cannot coexist in the same plant under natural conditions. The L-DOPA 4,5-dioxygenase encoded by theDODAgene is a key step in the pathway of betalain biosynthesis in Caryophyllales plants. Amaranth is an important resource for the study and extraction of betalains. In order to clarify the function ofAtrDODAfamily genes in betalain biosynthesis, we screened out threeAtrDODAfamily gene members associated with betalains based on a genome database and RNA-seq databases ofAmaranthus tricolor. Their characterization and expression pattern were further analyzed. The result of subcellular localization showed that all three AtrDODA members were located in the nucleus. Betacyanin and betaxanthin were promoted by paclobutrazol treatment in the leaves and stems of ‘Suxian No.1’ (red), while they were inhibited by gibberellin and darkness, which were consistent with the gene expression pattern ofAtrDODAs. After heterologous transformation of theAtrDODA1-1promoter into tobacco with GUS staining analysis, the promoter activity ofAtrDODA1-1of ‘Suxian No.1’ (red) amaranth was significantly higher than that of ‘Suxian No.2’ (green) amaranth. Furthermore, we analyzed the promoter activity ofAtrDODA1-1by GUS staining and qRT-PCR after sprayed exogenous MeJA and GA3on theAtrDODA1-1promoter transformed tobacco plants. The results showed thatAtrDODA1-1responded to plant hormones. This study could lay a foundation for revealing the biological functions of the amaranthDODAgene family, and provide new clues for the molecular mechanism of betalain synthesis.
研究领域:
植物学
·
分子生物学
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DOI
PubMed
高影响因子
PEDOSPHERE
·
2024
·
IF 5.2
Yue CAI,Lirong PU,Lianzhou SHEN,Xinghao WANG,Zhaoyue SUN,Guodong FANG,Dongmei ZHOU,Yunjiang YU,Juan GAO
Silica nanoparticles (nSiO 2 ) have attracted considerable attention in agricultural practices. However, their effects on polycyclic aromatic hydrocarbon (PAH) accumulation in plants remain largely unknown. Thus, this issue was tracked here with a 30-d pot experiment with foliar spraying different sizes of nSiO 2 (100 mg L -1 , 10 mL) on Amaranthus tricolor L. (amaranth). Results showed that 30 nm and 100 nm nSiO 2 increased phenanthrene (PHE) contents in amaranth leaves by 242% ± 88.4% and 158% ± 29.6%, respectively, which was more significant than 2 µm particles (96.0% ± 29.2%). Metabolomics indicated that compared to nSiO 2 , 2 µm SiO 2 more significantly boosted oxidative defense in amaranth leaves, enhanced cell membrane fluidity, and upregulated amino acid metabolism, glycolysis, and gluconeogenesis. In addition, the upregulation of discriminating metabolites was the most significant in 2 µm SiO 2 -treatment, followed by 100 nm and 30 nm. This is mainly because nSiO 2 promoted amaranth growth and decreased average PHE content per unit biomass, namely “dilute effect”. Thus, slighter metabolic disturbances were observed in 30 nm and 100 nm SiO 2 -treated group. The present study revealed the possibility of PAHs accumulation enhancement in vegetables with nSiO 2 foliar spayed. The results of this study provide theoretical guidance regarding to particle size selection for the safe agricultural application of nSiO 2 in PAHs-contaminated areas.
研究领域:
环境科学
·
农业科学
·
植物生理学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Fang Wang,Long Li,Jibran Iqbal,Zhuoran Yang,Yiping Du
In this study, the magnetic chitosan biochar (MCB) was magnetized by chemical coprecipitation after loading chitosan with Schiff base reaction. The prepared MCB was used to remove amaranth dye in solution. The synthesized MCB was characterized to define its surface morphology and specific elements. The amaranth dye adsorption system was optimized by varying the contact time, pH, and initial concentration. The adsorption of MCB on amaranth dye was measured in a wide pH range. According to Zeta potential , the surface of MCB was positively charged in the acidic pH region, which was more conducive to the adsorption of anionic amaranth dye. In addition, the adsorption data was fitted with the pseudo-first-order model and Langmuir adsorption model and the maximum adsorption capacity reached 404.18 mg/g. The adsorption efficiency of MCB was still above 95% after three cycles of adsorption and desorption. The removal percentage in the real sample of amaranth dye by MCB was within 94.5–98.6% and the RSD was within 0.14–1.08%. The MCB adsorbent with advantages of being easy to prepare, easy to separate from solution after adsorption, has good adsorption performance for amaranth dye and is effective potential adsorbent to remove organic anionic dye in wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）