RSC Advances
·
2019
·Vol. 9
·期 45
·26315-26320
·
IF 3.049
Lizhen Liu,Zhi Mi,Haihong Li,Caiqing Li,Qin Hu,Feng Feng
In this work, a novel fluorescence nanosensor for selective and sensitive determination of amaranth was constructed using carbon dots (C-dots). Water soluble C-dots with strong fluorescence were obtained by a simple microwave-assisted method using urea and glycine as raw materials. It was found that amaranth can efficiently and sensitively quench the C-dots fluorescence by the inner filter effect (IFE) and non-radiative energy transfer (NRET) mechanisms. The fluorescence quenching efficiency (F0/F) was strongly correlated with the concentration of amaranth in the 0.2–30 μM range. The detection limit (LOD) is 0.021 μM. There was no significant change in the fluorescence intensity of C-dots when other potentially interfering substances were present in the system. Our C-dots-based nanosensor was successfully utilized for the analysis of amaranth in drinks and showed rapid, sensitive and accurate responses. It indicates that the novel C-dots-based nanosensor has great potential in amaranth detection for real-life applications.
研究领域:
分析化学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2014
·
IF 3.259
Jing Zhang,Meiling Wang,Chao Shentu,Wenchang Wang,Zhidong Chen
A sensitive and convenient electrochemical method was developed for the simultaneous determination of the isomers of Ponceau 4R and Amaranth by an expanded graphite paste electrode (EGPE). The EGPE was prepared by mixing EG with solid paraffin. Compared with flake graphite paste and carbon paste electrodes, the EGPE showed higher electrocatalytic activity towards the oxidization of Ponceau 4R and Amaranth. Under optimal experimental conditions, the EGPE exhibited wide linear responses to Ponceau 4R and Amaranth ranging from 6 × 10 −8 to 4 × 10 −6 mol/L and 8 × 10 −8 to 4 × 10 −6 mol/L, respectively, and the detection limits for Ponceau 4R and Amaranth were 2 and 36 nmol/L, respectively, at a signal-to-noise ratio of 3. The EGPE showed good reproducibility, stability and reusability. The proposed method was successfully applied in the detection of Ponceau 4R and Amaranth in grape juice samples.
研究领域:
分析化学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Linping Ma,Shihua Liao,Jiawen Liu,Yanshun Ma
With the increasing demand for eco-friendly materials, the green synthesis of carbon dots (CDs) from natural sources has gained significant attention for applications in sensing and imaging. This study introduces a novel solvothermal method to synthesize high-yield red fluorescent CDs (R-CDs) from Amaranth, a sustainable and low-cost vegetable. The resulting R-CDs exhibit a remarkable quantum yield of 42.0 %, surpassing the performance of CDs derived from other natural sources. Characterization revealed a graphene core with surface functional groups such as –OH, –COOH, and –NH 2 . The R-CDs display excitation wavelength-independent emission at 601 nm and excellent stability under various environmental conditions. They were applied as a probe for detecting trace water in organic solvents, demonstrating high sensitivity, a broad linear detection range, and a low detection limit of approximately 5 ppm, attributed to the low solubility of CDs in water. This work underscores the potential of R-CDs as stable and efficient optical materials for environmental sensing, particularly in detecting water content in organic solvents, with broader implications for quality control in chemical and fuel industries.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2018
·
IF 3.997
Quanguo He,Jun Liu,Xiaopeng Liu,Guangli Li,Peihong Deng,Jing Liang
A novel manganese dioxide nanorods-electrochemically graphene oxide nanocomposites modified glassy carbon electrode (MnO 2 NRs-ErGO/GCE) was developed for the rapid and sensitive detection of Amaranth in foodstuffs. The morphology, structure and composition of MnO 2 NRs, ErGO, and MnO 2 /ErGO were characterized by SEM and XRD. The electrochemical behavior of Amaranth on the bare GCE , ErGO/GCE, and MnO 2 NRs-ErGO/GCE were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The voltammetric conditions (including pH, scan rate, accumulation potential as well as time) were optimized systematically. Due to large electrochemical active area and low charge transfer resistance, the MnO 2 NRs-ErGO/GCE exhibited a great enhancement effect on the oxidation of Amaranth, and significant increased the oxidation peak current i pa (approximately 38-fold increase compared to that of bare GCE). Under the optimum voltammetric conditions, the i pa varied linearly with Amaranth concentration in the range of 0.02 μM–10 μM, and 10 μM–400 μM with a low detection limit of 1.0 nM ( S / N = 3). Moreover, satisfactory results were obtained in the analysis of real samples. Together with the merits of rapidness, cost-effectivity, high sensitivity and selectivity, the result suggests the proposed MnO 2 NRs-ErGO/GCE have broad application prospects on the sensitive detection of Amaranth in various real samples.
研究领域:
分析化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Meiling Wang,Mingzhu Cui,Min Zhao,Hailiang Cao
In this paper, a new electrochemical sensor used for the determination of Amaranth in foods was reported, where a kind of porous graphene material-graphene nanomeshes (GNM) was employed as electrode modifying materials. The introduction of large pore density to the graphene sheets not only can in favor of more Amaranth molecules adsorbed to the surface of the working electrode through the pores, but also may benefit fast electron diffusion in the electrochemical detection process. So the GNM modified electrode enhanced its electrochemical signal obviously in the determination of Amaranth in foods and exhibited a wider linear response ranging from 5.0 × 10 − 9 to 1.0 × 10 − 6 M with a low detection limit of 7.0 × 10 − 10 M at a signal to noise ratio of 3. This work offers a new route in developing new electrochemical sensors for the determination of colorants additives and other hazard components in foods.
研究领域:
分析化学
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食品安全
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纳米材料
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电化学传感
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食品科学
✓ 已验证
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Wangyang Shen,Jiye Yang,Zhan Wang,Benguo Liu
With potato starch (PS) and corn starch (CS) as the controls, the structure and physicochemical properties of grain amaranth starch (GAS) and its binding with dihydromyricetin were investigated in this study. The results indicated that GAS granules were small in size (3.21 ± 0.13 μm) and had a low amylose content (11.57 ± 0.91%). GAS exhibited low paste clarity, solubility, and swelling power, but demonstrated good freeze-thaw stability and resistance to retrogradation. Although the pasting temperature of GAS was high (75.88 ± 0.03 °C), its peak viscosity, breakdown viscosity, and setback viscosity were significantly lower than those of PS and CS. GAS was classified as A-type starch, with a high molecular weight and broad distribution (M w , 3.96 × 10 7 g/mol; PDI, 2.67). For its chain length distribution, chain B1 had the highest proportion (50.09%), while chain B3 had the lowest proportion (13.50%). The complexation of GAS with dihydromyricetin effectively enhanced its ABTS and DPPH free radical scavenging capacities.
研究领域:
食品科学
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植物学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 12
·127511
·
IF 3.721
Jiangyan Cao,Qiuhong Min,Wenjuan Bian,Liuli Yang,Jing Lei,Mingyu Zhang,Hongqing Ma,Jianbei Qiu,Xuhui Xu,Xue Yu
High performance of synthetic colorants detection system has great importance for food safety, yet its quantitative analysis with high sensitivity remains challenging. Herein, core–shell NaGdF4: Yb3+, Er3+@NaYF4 upconversion nanoparticles based solid sensor (UCNPs-SS) is designed and explored in this work, where the detection limit of 0.01 μg mL−1 can be achieved thanks to the effective energy transfer between amaranth and this fluorescence-based sensor. Besides, ratiometric detection technique is employed in this system to ensure the accuracy of the detection, hence, insignificant change of the upconversion luminescence intensity of this UCNPs-SS is observed when the potentially interfering substances are present. Moreover, this UCNPs-SS exhibits good stability for recycled detections. Hence, the precise amaranth detection of three commercial soft drinks and excellent recoveries are achieved via our core–shell UCNPs-SS in this work. These positive results indicate that this proposed fluorescence detect approach not only exhibits excellent sensitivity, but also provides feasibility for practical applications.
研究领域:
分析化学
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食品安全
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纳米技术
✓ 已验证
DOI
高影响因子
Applied Water Science
·
2017
·Vol. 7
·期 8
·4247-4254
·
IF 0
Fu Likang,Zhang Gengwei,Wang Shixing,Zhang Libo,Peng Jinhui
A new adsorbent was fabricated via grafting polyethyleneimine (PEI) on activated carbon (AC) to remove anionic amaranth from water. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy were used to characterize the grafting process of PEI. The adsorption behavior of the anionic amaranth (AM) on the modified AC is further evaluated by adjusting pH, the modified AC dosage, contact time and the initial AM concentration. AM adsorption was dramatically dependent of solution pH and the optimum pH is 1.08. The adsorption rate was very high within 20 min and equilibrium was achieved at 180 min. The maximum adsorption amount of AM on the modified AC is 72.68 mg/g at pH 1.08. Compared with the unmodified AC, the adsorption efficiency on the modified AC was dramatically increased from 29.9 to 97%. An electrostatic interaction mechanism was proposed in the acidic solution. The adsorption isotherms were consistent with the Langmuir model and the obtained kinetic data were in accordance with a pseudo-second order adsorption behavior for the modified AC.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Rong Zou,Li Wang,Yuncong C. Li,Zhaohui Tong,Wenmin Huo,Keyu Chi,Hongli Fan
Amaranth ( Amaranthus mangostanus L.) has superior capability for accumulating cadmium (Cd) and has the potential to be used for phytoremediation of Cd contaminated soils. Iron (Fe) is chemically similar to Cd and may mediate Cd-induced physiological or metabolic impacts in plants. The purpose was to investigate the model of time-dependent and concentration-dependent kinetics of Cd absorption under Fe deficiency, understanding the physiological mechanism of Cd absorption in amaranth roots. The kinetic characteristics of Cd uptake by amaranth grown in Cd enriched nutritional solution with or without Fe addition and with methanol-chloroform, carbonyl cyanide 3-chlorophenylhydrazone (CCCP), and lanthanum chloride (LaCl 3 ) were compared using 109 Cd 2+ isotope labeling technique. The results showed that Cd uptake was time-dependent and about 90–93% of uptake occurred during the first 150 min. The kinetics of Cd uptake showed that two stages were involved. The saturation stage fitted the Michaelis-Menten model when concentrations of Cd were lower than 12.71 μmol/L and then the absorption of Cd by roots was increased linearly during the second stage. Only linear absorption was observed with methanol-chloroform treatment while the metabolic inhibitor CCCP inhibited only the saturation absorption process, and the Ca channel inhibitor LaCl 3 partially inhibited the two stages of absorption. These results indicated that the root absorption of 109 Cd 2+ was enhanced under Fe deficiency which induced more Fe transporters in the root cell membrane, and the Ca channel, apoplastic and symplastic pathways enhanced the Cd absorption in roots.
研究领域:
植物学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF AOAC INTERNATIONAL
·
2019
·Vol. 96
·期 3
·625-629
·
IF 1.201
Wang Mei L,Zhang Jing,Ding Ni N,Zhu Xiao L,Chen Zhi D
A sensitive and simple electrochemical method was developed for successful determination of amaranth in food samples by square-wave adsorptive stripping voltammetry based on an expanded graphite paste electrode (EGPE). The EGPE has strong and sensitive voltammetric responses to amaranth, owing to the multiporous structure and large surface area of EG. The electroanalytical determination of this azo dye was found to be optimal in Britton-Robinson buffer solutions (pH 7.0) under the following experimental conditions: accumulation time, 400 s; accumulation potential, 0.4 V; pulse amplitude, 25 mV; and frequency, 10 Hz. Under the optimum experimental conditions, the oxidation peak current was proportional to the concentration of amaranth over two ranges from 0.01 to 0.1 and 0.1 to 4.0 μM. These linear ranges of the EGPE toward amaranth were wider than other electrodes reported before. The LOD was estimated to be 0.005 μM (S/N = 3:1). The developed method was applied to the determination of amaranth in retsina samples, and the results were confirmed by HPLC. Statistical analysis of these data showed that the results of the two methods compared favorably. This work provides a simple and easy approach to the determination of amaranth in foods with high sensitivity and excellent selectivity.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Lin Yuan,Lizhen Liu,Zhi Mi,Meng Chen,Yunfeng Bai,Jun Qin,Feng Feng
Amaranth (AMA), a common food additive, is important to strictly control the content of food for the human body. In this paper, an innovative method based on intrinsic dual-emissive carbon dots (Y/B-CDs) was used to detect AMA. Y/B-CDs have two emission wavelengths at 416 and 544 nm with the excitation wavelength at 362 nm. The addition of AMA can rapidly quench the fluorescence of the two peaks with different degrees, and ratiometric detection can be achieved. Quantitative analysis showed two linear ranges of 0.1–20 μM and 20–80 μM, and detection limits are 42 and 33 nM, respectively. Moreover, good results were obtained for the detection of AMA in beverages and candy using Y/B-CDs. This suggests that the constructed sensor has the potential to detect AMA in real samples.
研究领域:
分析化学
·
食品科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SN Applied Sciences
·
2022
·Vol. 5
·期 1
·1-14
·
IF 0
Yu Changye,Lu Xian,Lu Jinyu,Zhang Yinjiang
In this study, zero-valent iron (ZVI) is applied to activate persulfate (PDS) for the degradation of amaranth (AMR). The effects of PDS concentration, ZVI concentration, solution pH , temperature, and reaction time on the degradation of AMR by the ZVI/PDS advance oxidation process are investigated. Sulfate and hydroxyl radicals are involved in the main reaction pathway of AMR and sulfate radical acts as a dominant oxidant. The CCD (central composite design) plan is chosen to build the RSM model for the prediction of AMR degradation. ANOVA analysis shows that the secondary fitting model had great fitness with R 2 = 0.997, \(R_{{{\text{adj}}}}^{2}\) = 0.936, p -value of lack of fit = 0.107. Optimum conditions for 98% AMR removal given by RSM are PDS concentration = 7.33 mM, ZVI dosage = 17.79 mM, initial pH 4.62, temperature = 59.49 °C, reaction time = 9.88 min which is proved to be very closed to the real removal rate of 96.78%. Sensitivity analysis indicates that the relative importance of the influencing parameters is of the following order: temperature, PDS concentration, pH , ZVI dosage, and reaction time. The PDS/ZVI system shows an acceptable RSE of about 75% and TOC removal of 85% on AMR oxidation. Finally, the possible pathway of AMR degradation is proposed.
研究领域:
环境化学
·
水处理技术
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高级氧化工艺
·
化学工程
✓ 已验证
DOI
危险品化学品经营许可证（带存储）