SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Yi He,Wei Huang,Yun Liang,Haili Yu
A novel, label-free, and low-cost colorimetric assay is developed for the detection of hydrazine with high-selectivity and excellent sensitivity using MnO 2 nanosheets as probes. It is first time demonstrated that MnO 2 nanosheets can be used as colorimetric probes for environmental analysis. In the absence of hydrazine, MnO 2 nanosheets exhibit a strong ultraviolet–visible (UV–vis) absorption peak at 370 nm due to the d-d transition. Once hydrazine is introduced, MnO 2 nanosheets will be reduced to Mn(OH) 2 nanoparticles, and the absorbance at 370 nm decreases remarkably. In this case, a distinct color change from yellow to colorless can be observed, which is dependent on the concentration of hydrazine. The signal change can allow colorimetric detection of hydrazine. The assay offers a good linear range from 0.5 μM to 20 μM and a detection limit of 0.4 μM for hydrazine. The lowest detection concentration by the naked eye is as low as 11 μM. Additionally, the developed assay was successfully applied for the colorimetric detection of hydrazine in environmental water samples.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2022
·
IF 4.966
Jiali Kou,Zhiyuan Meng,Xiaoyuan Wang,Zhonglong Wang,Yiqin Yang
Hydrazine is a kind of widely used chemical reagent , which has the harmfulness to human health and ecosystem. Therefore, it is necessary to develop a rapid and sensitive method for the detection of hydrazine. In this work, a novel cellulose-based fluorescent probe ( ACBC-CA ) was rationally developed for the selective and sensitive detection of hydrazine. ACBC-CA was synthesized by using cellulose acetate as skeleton and coumarin-based derivative as the fluorophore. ACBC-CA exhibited a significant “turn-on” fluorescence response to hydrazine, accompanied by a distinct fluorescence color change from colorless to bright yellow. The detection limit of ACBC-CA for hydrazine was calculated to be 1.2 × 10 −7 M. Furthermore, ACBC-CA was successfully applied to determine hydrazine in real environmental water and soil samples.
研究领域:
化学
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 23
·13048-13053
·
IF 3.049
Xuan Hu,Fengyi Wang,Qianqian Peng,Jing Hu,Huaqiao Peng,Lin Li,Baozhan Zheng,Juan Du,Dan Xiao
A highly sensitive and selective luminescent sensor for the detection of methyl parathion (MP) pesticide was described in this study. The target molecule HL was synthesized by modifying the structure of 4-hydroxybenzlidene imidazolinone (HBI) with nitrogen-containing heterocyclic 1,10-phenanthroline. In the presence of Eu3+, a HL–Eu3+ complex was formed which could emit strong red fluorescence due to the removal of coordinated water molecules and an intramolecular energy transfer from HL to Eu3+. Addition of MP into the strongly fluorescent solution of HL–Eu3+ induced quenching of the complex's fluorescence, and this quenching behavior occurred because of the competition coordination of MP and HL for Eu3+. A calibration curve was developed that related the extent of fluorescence quenching to MP concentration, making the HL–Eu3+ system a sensitive and selective fluorescent sensor for MP. Under the experimental conditions, the detection limit for MP was down to 95 nM based on LOD = 3σ/S. Moreover, the fluorescence assay developed here allowed the detection of MP in two different types of real samples including pond water and pear juice, and satisfactory results demonstrate that this fluorescent sensor based on HL–Eu3+ has potential application in environment and food analysis.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
Nature Protocols
·
2023
·Vol. 18
·期 5
·1621-1640
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IF 14.8
Han Zongsu,Wang Kunyu,Zhou Hong-Cai,Cheng Peng,Shi Wei
Luminescent sensing materials are attractive for environmental analysis due to their potential for high selectivity, excellent sensitivity and rapid (even instantaneous) response towards targeted analytes in diverse sample matrices. Many types of analytes have been detected in samples of wastewater for environmental protection, reagents and products in industrial production of drugs and pesticides, and biological markers in blood and urine for early diagnosis. It is still challenging, however, to develop appropriate materials with optimal sensing function for a targeted analyte. Here we synthesize metal–organic frameworks (MOFs) bearing multiple luminescent centers, such as metal cations (for example, Eu 3+ and Tb 3+ ), organic ligands and guests, which are chosen for optimal selectivity for the analytes of interest, including industrial synthetic intermediates and chiral drugs. Interaction between the metal node, ligand, guest and analyte results in a complex system with different luminescence properties compared with the porous MOF on its own. The operation time for the synthesis is usually less than 4 h; the quick screening for sensitivity and selectivity takes ~0.5 h and includes steps to optimize the energy levels and spectrum parameters. It can be used to accelerate the discovery of advanced sensing materials for practical applications.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tianmiao Wang,Jing Hu,Jingyuan Xu,Yibing Ji,Ruijun Li
The development of a self-calibrating ratio fluorescence probe without the need for additional substrates is a major advancement in biosensing. In this study, at room temperature, a self-calibrating infinite coordination polymer (SSA-Tb-ATP ICPs) has been proposed by self-assembling adenosine triphosphate (ATP) with 5-sulfosalicylic acid (SSA) and Tb3+. Due to the antenna effect, SSA-Tb-ATP ICPs exhibited strong green fluorescence emission of Tb3+ (at 547 nm) and blue fluorescence emission of SSA (at 407 nm). This material offers several advantages over existing detection methods, including simplicity of synthesis and exceptional sensitivity. Our self-calibrating SSA-Tb-ATP ICPs demonstrated excellent performance in detecting alkaline phosphatase (ALP) and phosphate (Pi) in both serum and environmental samples with detection limits of 0.076 U/L and 0.025 μM, respectively. Moreover, we successfully employed the SSA-Tb-ATP ICPs to perform cellular imaging of ALP in both hepatocellular carcinoma cells (HepG2) and normal liver cells (LO2), representing a significant advancement in ALP detection and imaging. The simplicity of the synthesis and high sensitivity make this probe a promising tool for early diagnosis of hepatocellular carcinoma in clinical settings and environment analysis.
研究领域:
生物化学
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医学诊断
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环境科学
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产品关联
DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
·
2022
·Vol. 20
·期 1
·715
·
IF 4.614
Gege Wu,Jiping Ma,Chenxi Wei,Shuang Li,Jinhua Li,Xiaoyan Wang,Lingxin Chen
Metal organic framework based mixed matrix membranes (MOF-MMMs) were synthesized and applied for dispersive membrane extraction (DME) of four neonicotinoid insecticides (nitenpyram, thiacloprid, imidacloprid, and acetamiprid) in environmental water, combined with high performance liquid chromatography (HPLC) for determination. Several experimental conditions were optimized in detail, involving dosage percentage of MOF, extraction time, sample pH, salinity, type and volume of eluent, and elution time. High sensitivity with limits of detection and quantification were achieved as 0.013–0.064 μg L−1and 0.038–0.190 μg L−1, respectively, and good precision with relative standard deviations were obtained as 3.07–12.78%. The proposed method has been successfully applied to determine four neonicotinoid insecticides in tap water, surface water, and seawater, satisfactory recoveries of spiked water samples were between 72.50 and 117.98%. Additionally, the MOF-MMMs showed good reusability with the extraction efficiencies almost remaining stable after 14 cycles. The MOF-MMMs based DME followed by the HPLC method can be a promising utility for the determination of neonicotinoid insecticides in environmental water samples, with high sensitivity and convenient operation.Keywords:metal-organic framework;neonicotinoid insecticides;dispersive membrane extraction;high performance liquid chromatography;environmental analysis
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
Journal of Pharmaceutical Analysis
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2022
·
IF 14.026
Nan Zhang,Yan Gao,Kangjia Sheng,Wanghui Jing,Xianliang Xu,Tao Bao,Sicen Wang
In this study, ecofriendly and economic carboxy-terminated plant fibers (PFs) were used as adsorbents for the effective in-syringe solid phase extraction (IS-SPE) of fluoroquinolone (FQ) residues from water. Based on the thermal esterification and etherification reaction of cellulose hydroxy with citric acid (CA) and sodium chloroacetate in aqueous solutions, carboxy groups grafted onto cotton, cattail, and corncob fibers were fabricated. Compared with carboxy-terminated corncob and cotton, CA-modified cattail with more carboxy groups showed excellent adsorption capacity for FQs. The modified cattail fibers were reproducible and reusable with relative standard deviations of 3.2%–4.2% within 10 cycles of adsorption-desorption. A good extraction efficiency of 71.3%–80.9% was achieved after optimizing the extraction condition. Based on carboxylated cattail, IS-SPE coupled with ultra-performance liquid chromatography with a photodiode array detector was conducted to analyze FQs in environmental water samples. High sensitivity with limit of detections of 0.08–0.25 μg/L and good accuracy with recoveries of 83.8%–111.7% were obtained. Overall, the simple and environment-friendly modified waste PFs have potential applications in the effective extraction and detection of FQs in natural waters.
研究领域:
环境科学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2021
·Vol. 34
·期 2
·238-248
·
IF 1.114
Li Yan-ni,Hu Yan-yun,Ding Lei,Zhou Dian-bing,Chen Wen-jun
Residues of tetracycline antibiotics (TCs) in environments may be harmful to human. Due to their high polarities, it is extremely challenging to efficiently enrich TCs with low concentrations in natural waters for analysis. In this work, a magnetic metal-organic framework Fe 3 O 4 @[Cu 3 (btc) 2 ] was synthesized and applied as a dispersive micro-solid phase extraction adsorbent for TCs enrichment. Effects of dispersive micro-solid phase extraction conditions including extraction time, solution pH, and elution solvent on the extraction efficiencies of TCs were investigated. Results show that TCs could be enriched efficiently by Fe 3 O 4 @[Cu 3 (btc) 2 ], and electrostatic interaction between TCs and Fe 3 O 4 @[Cu 3 (btc) 2 ] dominated this process. Combined with liquid chromatography-tandem mass spectrometry, four TCs residues (oxytetracycline, tetracycline, chlortetracycline, and doxycycline) in natural waters were determined. The detection limits (LOD, S/N = 3) of the four antibiotics were 0.01–0.02 µg/L, and the limits of quantitation (LOQ, S/N = 10) were 0.04–0.07 µg/L. The recoveries obtained from river water and aquaculture water spiked with three TCs concentration levels ranged from 70.3% to 96.5% with relative standard deviations of 3.8%–12.8%. Results indicate that the magnetic metal-organic framework based dispersive micro-solid phase extraction is simple, rapid and high-loading for antibiotics enrichment from water, which further expand the practical application of metal-organic frameworks in sample pretreatment for environmental pollutant analysis.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2021
·
IF 4.759
Lijuan Zang,Man He,Zhekuan Wu,Beibei Chen,Bin Hu
In this study, spherical imine-linked covalent organic frameworks (COFs) were fabricated from 2,5-dimethoxybenzene-1,4-dialdehyde (DMTP) and 1,3,5-tris (4-aminophenyl) benzene (TAPB) and named as TAPB-DMTP-COFs. The resulting powders were coated onto bare glass bars via physical-adhesion to obtain TAPB-DMTP-COFs coated stir bars. The self-made stir bars exhibited higher extraction efficiency (74–85%) and faster dynamics (50 min) towards non-steroidal anti-inflammatory drugs (NSAIDs) over ethylene glycol-Silicone (42–68%, 180 min) and polydimethylsiloxane (3–61%, 180 min) coated stir bars. Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy (XPS), zeta potential and water contact angle were employed to provide a comprehensive understanding of the adsorption mechanism between the coating and analytes. The results displayed that methoxy group worked as an adsorption site helping the adsorption of interest NSAIDs onto the TAPB-DMTP-COFs coating and hydrogen bonds formed between the O atoms and the analytes. Additionally, the adsorption mechanisms possibly also involved π-π interaction and hydrophobic interaction. Moreover, TAPB-DMTP-COFs coated stir bars exhibited good stability and could be reused more than 60 times. Subsequently, a method by combining TAPB-DMTP-COFs coated stir bar sorptive extraction (SBSE) with liquid chromatography (HPLC)-ultraviolet detector (UV) was established for the determination of four NSAIDs in environmental waters. Under the optimized conditions, the established method showed a wide linear range of 0.2/1–500 μg/L for interest NSAIDs, the limits of detection varied from 0.039 to 0.312 μg/L. Yangtze River water, East Lake water and Spring water were subjected to the proposed method, the recoveries in spiked samples were 84.7–104%, 81.2–101% and 82.6–97.6%, respectively.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Shuhuai Li,Jianping Li,Xionghui Ma,Chaohai Pang,Guihao Yin,Jinhui Luo
A dual selection/recognition effect is described for cobalt (II) ions (Co 2+ ). It is based on bovine serum albumin-metal-Co 2+ coordination (BSA-Co 2+ ) and the use of a molecularly imprinted polymer (MIP). An electrochemiluminescence (ECL) switch sensor was designed for detecting nanomolar levels of Co 2+ . The BSA-Co 2+ coordination complex was chosen as a template to prepare a MIP modified switch sensor. The coordination reaction between BSA and Co 2+ provides the first step in recognition, and MIP provides the second step for Co 2+ . This leads to a strong improvement in selectivity of the sensor. A multi-walled carbon nanotube/Cu nanoparticles/carbon quantum dots nanocomposite (MWCNT/Cu/C-dots) acts as an ECL device, and the BSA-Co 2+ complex quenches the ECL signal. Therefore, the elution and resorption of BSA-Co 2+ can be used as a switch to control ECL. Additionally, a method was established to detect Co 2+ , with the detection limit as low as 3.07 × 10 −10 mol/L. The method was applied to the analysis of spiked environmental water, soil samples, and agricultural products. The recovery rates of the method were in the range of 87.5–111.3%.
研究领域:
分析化学
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环境监测
·
食品安全
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分子识别
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生物传感
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纳米材料
·
电化学分析
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zexian Chen,Yaojie Zhang,Wenjuan Dong,Yang Liu,Li Zhang,Yueping Dong,Zihan Wang,Yihong Chen,Qin Hu,Chuan Dong,Xiaojuan Gong
Lignin-derived carbon dots (L-CDs) were synthesized via a simple one-step hydrothermal method using sodium lignosulfonate and polyethylene polyamine as carbon and nitrogen sources, respectively. The obtained L-CDs exhibited strong blue fluorescence, which was effectively quenched by Co(II) and VB 12 through an inner filter effect (IFE), accompanied by distinct color changes under both visible and ultraviolet light. Taking advantage of this property, a smartphone-assisted visual sensing strategy was developed for the rapid and portable detection of Co(II) and VB 12 with high selectivity and sensitivity. The detection limits were as low as 0.17 μM for Co(II) and 0.03 μM for VB 12 . Furthermore, the proposed sensing platform was successfully applied to the determination of Co(II) in environmental water samples and VB 12 in pharmaceutical formulations. This work not only demonstrates a novel design of carbon dot-based dual-mode sensors but also highlights the value-added utilization of lignin in analytical applications.
研究领域:
分析化学
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环境监测
·
药物分析
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纳米生物技术
·
传感器开发
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食品安全
·
转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Senyang Liu,Jinhui Zhang,Xiaohu Liu,Yating Zhang,Yongchang Zheng,Jinying Yuan,Jie Bao
Cross-reactive sensor arrays have powerful abilities in distinguishing multiple analytes. The larger the effective data volume is, the better the detection performance is. However, current collected data volume depends heavily on the amount of sensing materials involved. It is data-inefficient for each material and causes heavy workload to prepare materials. Herein, by introducing the dimension of excitation wavelength, we report a cross-reactive sensor array by using only one fluorescent material ( β -cyclodextrin-modified quantum dots, QD- β -CD). The newly added dimension is demonstrated by collecting emission signals under four excitation wavelengths. Through machine learning algorithms, the cross-reactive sensor array can be used for the detection of single nitrophenol (NP) isomer ( e.g. a superior detectability with a classification accuracy of 94.9 % for 0.01 μM p -nitrophenol), and concurrent quantitative analysis of complex binary/ternary NP mixtures in environment analysis. Our results indicate that the additional dimension of excitation wavelength can provide an effective way to increase the differences of multiple analytes in the design of cross-reactive sensor array. The idea of adding an extra dimension can be generally applicable for the fields of multidimensional information collection.
研究领域:
分析化学
·
环境科学
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材料科学
·
机器学习
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）