FOOD CHEMISTRY
·
2020
·
IF 6.306
Yaoping Hu,Zhijin Gao,Junfei Luo
Facile detection of malachite green (MG), a toxic dye, in aquaculture is urgently demanded for environment and food safety. Herein, we design a novel fluorescent probe, namely red emissive Se,N,Cl-doped carbon dots (CDs), to accurately determinate MG. CDs are prepared by hydrothermal treatment of selenourea and o-phenylenediamine in HCl solution. This material exhibits excitation-independent dual emissions at 625 and 679 nm, with a high quantum yield of 23.6%. A selective and sensitive fluorescent sensor toward MG is established based on inner filter effect, because both the excitation and emission light of CDs can be strongly absorbed by MG. The fluorescence quenching of CDs is linear to the MG concentration over the range of 0.07–2.50 μM with a low detection limit of 21 nM. Trace-level analysis of MG in fish tissue is successfully explored, demonstrating the great potential of the proposed sensor for MG monitoring in aquatic products.
研究领域:
环境科学
·
食品安全
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Li Liqing,Yang Lin,Li Fangxu
A novel collector of 1-(2-hydroxyphenyl) dec-2-en-1-one oxime (HPDO) was synthesized from 2-hydroxy acetophenone and octanal, and its flotation and adsorption behavior for malachite were studied by flotation tests and x-ray photoelectron spectroscopy (XPS) analysis. The flotation results of a single mineral show HPDO is a special collector for malachite. Compared with benzohydroxamic acid (BHA), isobutyl xanthate (SIBX), and dodecylamine (DA), HPDO exhibits excellent flotation performance for malachite and satisfied selectivity against quartz and calcite over a wide pH range. The HPDO with a concentration of 200 mg/L can float 94% malachite at pH 8, while only recovering 7.8% quartz and 28% calcite. XPS data give clear evidence for the formation of a Cu-oxime complex on malachite surfaces after HPDO adsorption.
研究领域:
矿物加工工程
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表面化学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2015
·Vol. 182
·期 9
·1791-1796
·
IF 3.741
Li Lu,Lin Zheng-zhong,Chen Xiao-mei,Zhang Hong-yuan,Lin Yi-dong,Lai Zhu-zhi,Huang Zhi-yong
Molecularly imprinted polymer (MIP) particles for malachite green (MG) were prepared by emulsion polymerization using methacrylic acid as the functional monomer, ethylene glycol dimethacrylate as the cross-linker, and a combination of Span-80 and Tween-80 as an emulsifier. The MIP particles were characterized by SEM micrographs and FT-IR spectra. Their binding capacity for MG was evaluated based on kinetic and isothermal adsorption experiments and compared to non-imprinted polymer particles. Analytical figures of merit include an adsorption equilibrium time of 15 min, an adsorption capacity of 1.9 mg∙g‾ 1 in acetonitrile-water (20:80), and an imprinting factor of 1.85. The MIP particles were successfully applied to the extraction of MG from fish samples spiked with MG and the other interfering substances prior to its determination of MG by HPLC. Spiked samples gave recoveries of MG that ranged from 86 to 104 %, much higher than that of the other interfering substance.
Molecularly imprinted polymer particles for malachite green (MG) were prepared by emulsion polymerization. They show adsorption capacity of 1.9 mg∙g‾¹ with imprinting factor of 1.85, and were successfully applied to the extraction of MG from spiked fish samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Jian Song,Shuyu Lai,Dingnan Wang,Xiaomei Wu,Yiming Zhang,Linjiang Pang,Tingting Chai,Ji Zhao,Xiaodong Wang
The development of simultaneous and rapid screening of the residues of veterinary drugs and their metabolites is up to now still a challenge. In this study, a novel strategy of read-out analysis is proposed based on high-performance thin-layer chromatography (HPTLC) separation coupled with self-visualization detection of trace of leucomalachite Green (LMG) and malachite green (MG) in aquatic products. The novel self-visualization nanomaterial was successfully synthesized and subsequently fully characterized. The ionic associate MG–I 3 formed on the visualization sensing interface was effectively attested by MALDI-TOF/TOF-MS for the first time. A serials of visualization reactions were conducted on the target zone surface of HPTLC after separation. Under the optimum conditions, the calibration curves of LMG and MG were obtained with good linearity in the range of 0.25–8.0 μg mL −1 and 0.125–4.0 μg mL −1 , respectively. The limits of detection and limit of quantification were calculated as 1.71 and 5.19 μg kg −1 for LMG and 0.9 and 2.74 μg kg -1 for MG, respectively. Real sample analysis and validation provided satisfactory results. The proposed method has the potential to detect simultaneously, rapidly, and accurately LMG and MG in aquatic products during storage, handling, and sales.
研究领域:
分析化学
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食品科学
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兽医学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2021
·
IF 4.765
Bin Yang,Ya-Feng Fu,Wan-Zhong Yin,Qiu-Yue Sheng,Zhang-Lei Zhu,Xue-Ming Yin
In this study, laurylamine ethoxylate with fifteen ethoxylate units (LAEO-15) was employed as a quartz collector for the recovery of malachite from quartz via reverse flotation. Its collecting performance and adsorption mechanism were evaluated by flotation tests and surface analyses. The results of flotation tests suggested that LAEO-15 had an intense ability to collect quartz instead of malachite, and displayed a high flotation selectivity, which promoted the significant floatability differences of both minerals. XPS confirmed that quartz adsorbed a much larger quantity of LAEO-15 than malachite, resulting in the selective collection of quartz with LAEO-15. Zeta potential and FTIR characterization further uncovered that the strong adsorption of LAEO-15 was driven by hydrogen bonding and electrostatic attraction, while electrostatic repulsion hindered the LAEO-15 adsorption on the surface of malachite. As a result, the effective separation of malachite and quartz was realized with 20 mg/L LAEO-15 at pH 6.30 via reverse flotation, in which 92.54% of malachite was recovered and 92.72% of quartz was removed, coupled with a high SI value of 12.57 in concentrate. Therefore, compared with conventional collector dodecylamine, LAEO-15 exhibited high selectivity and purification effectiveness for the separation of malachite from quartz.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Tianxing Fang,Qingyi Wei,Erwen Wu,Hongbin Pu
Malachite green (MG), with teratogenic and reproductive toxicity, is widely misused as an antimicrobial agent, posing a serious threat to animal and human health. Therefore, this study developed a novel recyclable Surface-enhanced Raman scattering (SERS) hydrogel substrate, TiO 2 /MXene/PAA-PAM@AuNPs (TMPA), by forming a dual hydrogen-bond network using a PAA-PAM hydrogel matrix with TiO 2 /MXene and embedding AuNPs, for detecting MG residues in aquatic products. This hydrogel exhibits high sensitivity, with a detection limit for MG of 8.13 × 10 −6 mg/L. Additionally, it can completely degrade surface-adsorbed MG within 60 min under light irradiation, achieving self-cleaning and enabling reuse for more than seven cycles, and can be stored for over 50 days while maintaining its SERS activity due to the support and preservation provided by the hydrogel network. Additionally, this substrate can rapidly detect MG residues on or within fish, offering a new strategy for monitoring MG residues in aquatic products.
研究领域:
食品安全
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分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chen Cheng,Guangsheng Zeng,Zhiqiang Huang
3-Ethyl-4-pyridylamidoxime (EPA) and 3-methyl-5- tert -butyl-4-pyridylamidoxime (MBPA) were introduced as the collectors in the flotation and enrichment of malachite from calcite and quartz. Compared with MBPA and the traditional collector benzohydroxamic acid (BHA), EPA exhibited a better flotation performance. Its collecting ability to malachite was stronger than BHA, and its selectivity toward calcite and quartz was better than MBPA. In the absence of Pb 2 + ions, 2.0 × 10 −4 mol/L EPA at pH 8.0 could recover about 86 % malachite, 20 % calcite and 22 % quartz. Under the same conditions, BHA floated out around 58 % malachite, 27 % calcite and 10 % quartz. The contact angle and SEM proved that EPA could enhance the surface hydrophobicity of malachite via corrosion to produce more active sites for its heavy adsorption. FTIR and XPS revealed that EPA would chelate with the surface Cu atom to form -O-Cu and -N-Cu bonds. EPA owned stronger electron-donating ability and worse electron-accepting ability than BHA, which brought a stronger chemical reactivity. Moreover, its isomer could further enhance the adsorption ability onto malachite. The novel amidoxime collector EPA was able to efficiently lead-free enrich malachite and enhance the industrial capacity to treat copper oxide ores.
研究领域:
矿物加工工程
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化学工程与技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Qin Hu,Qiuyan Mao,Yikun Cui,Shiyun Gong,Lixia Xiao,Xiaojuan Gong,Tianzhu Guan,Zhen-quan Yang
This work made the first attempt to construct a florescence assay based on CDs@FMs (carbon dots-based fluorescence microspheres) for ultrasensitively probing malachite green (MG). Through static quenching and inner filter effect (IFE), the 581-nm emission peak of CDs@FMs could be significantly suppressed by MG. Our results demonstrated two good linear fluorescence responses for MG in the concentration scopes of 0.01–0.1 μM and 0.1–10.0 μM, respectively. Strikingly, the detection limits (LODs) achieved were down to picometer (56.7 pM) and nanometer levels (0.57 nM). Furthermore, this method exhibited good consistency with the HPLC results when applied for quantitatively screening MG from fish samples. Our current research highlights a promising application of CDs@FMs for enhanced MG probing in aquatic products with the merits of rapidity, simplicity, high accuracy and stable signal readout.
研究领域:
分析化学
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食品安全
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 3
·1-10
·
IF 5.3
Han Hongyu,Huang Yiqun,Miao Junjian,Lai Keqiang
Surface-enhanced Raman spectroscopy (SERS) was combined with stoichiometric analysis to synthesize a AuNPs@MIL-100 (Fe) SERS substrate. This high-performance, and low-cost metal–organic framework-based SERS nano sensor is capable of detecting malachite green (MG) residues in fish. The minimum detectable concentration of MG in standard solutions is 0.1 μg/L, while in fish samples, the detection range spanned from 0.003–0.088 μg/kg. The partial least squares regression (PLSR) and support vector machine regression (SVR) were applied to model the SERS data, enhancing both the precision and reliability of the detection. The results show that compared with the traditional linear regression and PLSR models, the prediction accuracy of the SVR model is an improvement with higher stability. MG standard solutions and three fish samples can be analysed directly or after simple extraction. This method can be used to detect trace harmful substances in different aquatic products. Graphical
研究领域:
食品安全
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2017
·Vol. 82
·期 2
·424-431
·
IF 1.575
Zhang Jing,Liu Mao,Liu Zhijie,Yang Tao,He Qiulai,Yang Kai,Wang Hongyu
Abstract This paper presents the synthesis of a novel core–shell covalently functionalized Fe 3 O 4 coated SiO 2 decorated graphene oxides (Fe 3 O 4 @SiO 2 –GO) adsorbent. The prepared Fe 3 O 4 @SiO 2 –GO was characterized by fourier transform infrared spectrum, X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS), and magnetic measurements. And the adsorption properties of the Fe 3 O 4 @SiO 2 –GO toward malachite green were systematically investigated. Various factors possibly affecting the adsorption behavior (initial concentration, contact time, and adsorbent dosage) were also studied in detail. The adsorption capacity (q m ) of Fe 3 O 4 @SiO 2 –GO for malachite green was found to be 265.87 mg/g with best fit to Langmuir isotherm ( R
2 = 0.968), and the adsorption mechanism follows the pseudo-second-order model ( R
2 = 0.981). The results indicate that the Fe 3 O 4 @SiO 2 –GO adsorbent, which is easily separated via an external magnetic field, is a potential low-cost effective material for malachite green removal from contaminated water. Graphical Abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CURRENT MICROBIOLOGY
·
2025
·Vol. 82
·期 5
·1-12
·
IF 2.6
Xie Chengjia,Shi Guangjian,Gao Qing,Zhang Yujie,Fan Siyu,Xu Xian
Malachite green (MG) is a toxic triphenylmethane dye widely used in industry, as well as a controversial antimicrobial in aquaculture, leading to environmental concerns. In this study, the conditions for the decolorization of MG by Deinococcus wulumuqiensis R12 were optimized. Under the optimized conditions, a degradation efficiency of 99.30% was achieved for 200 mg/L MG within 30 min, with an initial biomass concentration of 5.5 g/L at 32 °C and pH 5.0. When the initial concentration of MG was increased to 1 g/L, the degradation efficiency surpassed 97% after 2.5 h. Analytical techniques, including UV–VIS, FTIR, GC–MS, and LC–MS analyses revealed that the degradation products included desmethyl-malachite green, di-desmethyl-malachite green, 4-(dimethylamino)benzophenone, and 4-(methylamino)benzophenone, indicating that the MG degradation mechanism of R12 was based on oxidation and demethylation processes. Furthermore, microbial assays confirmed that the byproducts of MG degradation by R12 are much less toxic than the parent compound, indicating the potential of Deinococcus wulumuqiensis R12 as an effective bioremediation agent for MG-contaminated environments.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 17
·4329
·
IF 3.1
Junpeng Ren,Shijiang Zhang,Yu Wang,Hengxiu Yang
The abundant pore structure and carbon composition of sphagnum peat moss render it a bio-based adsorbent for efficient methylene blue removal from wastewater. By utilizing sphagnum moss sourced from Guizhou, China, as raw material, a cost-effective and highly efficient bio-based adsorbent material was prepared through chemical modification. The structure and performance of the modified sphagnum moss were characterized using SEM, EDS, FTIR, and TGA techniques. Batch adsorption experiments explored the effects of contact time, adsorbent dosage, pH, initial dye concentration, and temperature on adsorption performance. Kinetics, isotherm models, and thermodynamics elucidated the adsorption behavior and mechanism. The modified sphagnum moss exhibited increased surface roughness and uniform surface modification, enhancing active site availability for improved adsorption. Experimental data aligned well with the Freundlich isotherm model and pseudo-second-order kinetic model, indicating efficient adsorption. The study elucidated the adsorption mechanism, laying a foundation for effective methylene blue removal. The utilization of modified sphagnum moss demonstrates significant potential in effectively removing MB from contaminated solutions due to its robust adsorption capability and efficient reusability.
研究领域:
环境科学
·
生物材料学
✓ 已验证
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）