INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2019
·
IF 1.267
Kai Sun,Shun-Yao Li,Hui-Ling Chen,Qing-Guo Huang,Youbin Si
In this study, we used a simple and rapid colourimetric reaction for visual sensing of Fe2+ and Pb2+ ions in water by employing nano-MnO2 as a natural oxidase mimic to respectively catalyse ABTS and TMB in citrate-phosphate buffer solution (C-PBS) at 25°C and pH 3.8. It was found that nano-MnO2 possessed highly oxidase-mimicking activity with the Km values of 0.030 and 0.027 toward ABTS and TMB, respectively, indicating TMB had a stronger affinity on nano-MnO2 than ABTS. Interestingly, the presence of 0.01 mmol·L−1 Fe2+/Pb2+ ion was able to significantly down-regulate the activity of MnO2 nanozyme in nano-MnO2-mediated ABTS reaction processes (P < 0.01), which mainly due to the strong adsorption of metal ion toward nano-MnO2 surface via the electrostatic attractions, thus leading to the passivation and inactivation of MnO2 nanozyme catalytic activity. Thereinto, Fe2+ reacted with multivalent manganese by oxidation-reduction, while Pb2+ was specifically adsorbed onto the surface of MnO2 nanozyme and formed complexes. Notably, only Fe2+ ion inhibited the activity of MnO2 nanozyme-TMB with a detection limit as low as 1.0 μmol·L−1. In MnO2 nanozyme-ABTS sensing systems, Fe2+ and Pb2+ ions detection limit of 0.5 and 2.0 μmol·L−1 were, respectively, achieved with a linear response range of 0–0.02 and 0–0.8 mmol·L−1, implying the developed MnO2 nanozyme-ABTS sensor was potentially applicable for the visual determination of Fe2+ and Pb2+ ions in water. In the real water samples, MnO2 nanozyme-ABTS achieved high accuracy (relative errors: 3.4‒10.5%) and recovery (96‒110%) for respective detection of Fe2+ and Pb2+ ions. The simple and rapid MnO2 nanozyme-ABTS sensing systems might provide a practical assay for visual detection of Fe2+ and Pb2+ ions in the environmental water samples.
研究领域:
分析化学
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环境科学
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生物催化
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Haoxue Tan,Zhonglong Wang,Xiaoqin Yang,Xiaoping Rao,Ping Zhao,Qian Jiang
Hydrazine (N 2 H 4 ) has been extensively utilized as a highly reactive chemical reagent. However, it is also seriously harmful to human beings and ecosystem. Thus, the development of an efficient detecting method for hydrazine is desirable. Here, caffeic acid was chose as starting material to synthesize a new ratiometric fluorescent probe HPA for detecting hydrazine. This probe possessed the specific recognition ability for hydrazine over other analytes with low detection limit (0.106 µM) and extremely short time (60 s). The sensing mechanism of probe HPA for hydrazine was proved by 1 H NMR titration and theoretical calculations. In addition, the probe HPA was loaded on paper strip for rapid quantitative detection of hydrazine with the aid of a software (Image J). The effective detecting performances of probe HPA for hydrazine were verified in environmental water samples as well as in living cells. Thus, HPA has great potential for detection and analysis of hydrazine in health supervision and environmental protection.
研究领域:
分析化学
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环境科学
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生物医学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Sensor Research
·
2024
·Vol. 3
·期 5
·2300185
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IF 0
Jialuo Zhuang,Zijian Li,Hong Bi
The development of fluorescent probe with high spectral overlap with analyte is favorable for the sensing applications via inner filter effect, which requires facile tuning of their structure and photophysical properties. Herein, the rational design of blue emissive carbon dots (B-CDs) is reported for effective detection of metronidazole (MNZ) in both deionized water and real water samples. The design strategy is based on the elaborate choice of precursors that allows precise control over the nitrogen-doping degree and graphitization content of B-CDs. As a result, the as-prepared B-CDs exhibit a specific and quick fluorescence quenching response to MNZ via the IFE mechanism because of their good spectral overlap in absorbance. This approach shows a broad linear range (0.5–160 µ m ), low detection limit (0.1 µ m ), and moderate selectivity, suggesting its promise for practical applications in environmental sensing.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
DOI
ANALYTICAL CHEMISTRY
·
2012
·
IF 5.856
Zheng Wang,De-Man Han,Wen-Ping Jia,Qi-Zhong Zhou,Wei-Ping Deng
The development of highly sensitive and selective detection techniques for the discrimination of relevant toxic benzenethiols and biologically active aliphatic thiols is of considerable importance in the fields of chemical, biological, and environmental sciences. In this article, we describe a new design of reaction-based fluorescent probe for discrimination of thiophenols over aliphaticthiols through intramolecular charge transfer pathways using N-butyl-4-amino-1,8-naphthalimide as a fluorophore, the strongly electron-withdrawing 2,4-dinitrobenzenesulfonamide group as a recognition unit, and 2,3-dihydroimidazo-[1,2-a] pyridine moiety as a linker. This rational design not only affords finely tunable spectroscopic properties by adding 2,3-dihydroimidazo-[1,2-a] pyridine moiety but also provides the chance to regulate the selectivity and sensitivity of the probe due to the formation of a new type of potentially reversible sulfonamide bond through 4-dimethylaminopyridine-like resonance. The developed probe displayed high off/on signal ratios, good selectivity, and sensitivity with a detection limit of 20 nM and a relative standard deviation of 1.7% for 11 replicate detections of 0.33 μM thiophenol and was successfully applied to the determination of thiophenols in water samples with quantitative recovery (from 94% to 97%) demonstrating its application prospect for thiophenols sensing in environmental and biological sciences.
研究领域:
化学科学
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环境科学
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生物科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
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2015
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IF 3.545
Haiyan Cao,Zhaohui Chen,Yuming Huang
This paper reports an “off-to-on” fluorescence (FL) probe for sensitively and selectively detecting phosphate ions (Pi's). Fabrication of the probe was based on the competition between Pi's and tannic acid-stabilized copper nanoclusters (TA-Cu NCs) for Eu 3+ binding. The addition of Eu 3+ ions to TA-Cu NCs triggered the aggregation of TA-Cu NCs, which quenched the FL of TA-Cu NCs. After Pi addition, the aggregated TA-Cu NCs solubilized into the aqueous solution to facilitate the Pi-triggered dispersion of TA-Cu NCs. This phenomenon was due to the stronger binding ability between Pi's and Eu 3+ than that between TA and Eu 3+ , leading to FL recovery of Cu NCs. The degree of redispersion of TA-Cu NCs was directly related to Pi concentration. Thus, Pi concentration can be quantitatively determined by the change in FL of the TA-Cu NCs dispersion. Under the optimized conditions, the change in FL presented a linear relationship with Pi concentration from 0.07 μmol L −1 to 80 μmol L −1 . The limit of detection for Pi was 9.6×10 −3 μmol L −1 at a signal-to-noise ratio of 3. For Pi determination in real samples, only 1 mL water sample was needed. The proposed probe was highly sensitive, free from the interference of other common species in aqueous media, and particularly useful for the fast and simple diagnosis of water-eutrophication extent.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2018
·
IF 2.746
Qian Chen,Panpan Zhu,Jie Xiong,Lixia Gao,Kejun Tan
In this study, a simple, fast and cost-effective triple-channel optical assay for the determination of PFOS has been developed. The carbon quantum dots (CDs) were prepared by one-pot hydrothermal method and employed as probe for sensing PFOS. CDs react with PFOS to form ground-state complex, which brings about the intensity changes of three signals including fluorescence, UV–vis absorption and resonance light scattering (RLS). And the changes of the fluorescence and absorption signals can be used for the visual detection of PFOS. And there is a certain relationship between the three-signal changes with the concentration of PFOS, respectively. The proposed assay exhibits good selectivity and sensitivity with a limit of detection (LOD) of 18.27 nmol/L in the fluorescence signal. Fluorescence lifetime , transmission electron microscopy (TEM) images, Fourier transform infrared (FTIR) and zeta potential were investigated for the mechanism study. Furthermore, this promising approach was also successfully applied to PFOS sensing in real water samples with RSD ≤ 2.09%.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 7
·4952-4957
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IF 4.6
Tingyu Zhang,Tingting Cai,Yi Zhang,Tanlai Yu
Persulfate, a powerful oxidizing agent, is extensively employed in numerous industries. Accurate and rapid detection of persulfate (S2O82−) is essential. This study reports the development of a fluorescent sensor based on Am-CDs. It is synthesized from ascorbic acid (AA) and m-phenylenediamine (m-PD) through a one-step hydrothermal method. The fluorescence of Am-CDs demonstrated selective sensitivity to S2O82− via static quenching. A sensitive fluorescent sensor was constructed for S2O82−, exhibiting a linear detection range of 1.96 to 15.59 μM with a limit of detection (LOD) of 0.94 μM. This fluorescence method was successfully applied to detect S2O82− in water samples, achieving recoveries of 98.07% to 102.33%. The fluorescent sensor developed in this study offers a simple and effective method for quantifying S2O82− in aquatic environments.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2020
·Vol. 68
·期 1
·106-113
·
IF 1.554
Peipei Xu,Xiaonan Liu,Li Liu,Weiju Zhu,Cun Li,Min Fang
A new carbazole functionalized Schiff base CBM was synthesized and characterized. CBM can selectively recognize Cu 2+ via UV–vis and fluorescence signal among common biologically relevant metal ions. When Cu 2+ was added to CBM, there was a significant enhancement at the maximum absorption wavelength of 393 nm and with a distinct blue shift. The maximum emission peak was significantly attenuated by a factor of about 15 times at 535 nm and the blue shift of emission wavelength was observed. When other metal ions were added, there was no remarkable change at the maximum absorption and emission peak. Under the illumination of 365 nm ultraviolet lamp, the color of the CBM solution changed from light blue to dark blue after the addition of Cu 2+ . The combination mechanism of CBM with Cu 2+ was nicely explored by density functional theory studies. The probe CBM has good cell permeability, fluorescence electron microscopy experiments show that CBM can be used as a fluorescent probe to detect the presence or absence of Cu 2+ in Hela cells. Furthermore, the probe CBM can also be used for the detection of copper ions in actual water samples.
研究领域:
分析化学
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生物化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Bohan Wang,Lanhua Liu,Haopeng Zhang,Zhiqiang Wang,Kang Chen,Bo Wu,Limin Hu,Xiaohong Zhou,Lanlan Liu
Background Quinolones (QNs) widely exist in the environment due to their wide range of applications and poor metabolic properties, resulting in the generation and spread of resistance genes, posing a potential threat to human health. Traditional analytical methods cannot detect all broad ranges of QNs simultaneously. The development of facile, efficient and reliable method for quantification and assessment of the total QNs is a long-lasting challenge. Results We hereby provide a simple, sensitive and instantaneous group-targeting biosensor for the detection of total QNs in environmental water samples. The biosensor is based on a group-specific antibodies with high affinity against QNs. Fluorescent labeled antibodies bound to the coated antigen modified on the surface of the transducer, and excited by the evanescent waves. The detected fluorescent signal is inversely proportional to the QNs concentration. This biosensor exhibited excellent performance with detection limits lower than 0.15 μg L −1 for all five QNs variants, and even lower than 0.075 μg L −1 for ciprofloxacin (CIP) and ofloxacin (OFL). Environmental water samples can be detected after simple pretreatment, and all detection steps can be completed in 10 min. The transducer has a high regenerative capacity and shows no significant signal degradation after two hundred detection cycles. The recoveries of QNs in a variety of wastewater range from 105 to 119%, confirming its application potential in the measurement of total QNs in reality. Significance The biosensor can realize rapid and sensitive detection of total QNs in water samples by simple pretreatment, which overcomes the disadvantage of the traditional methods that require complex pretreatment and time-consuming, and pave the groundwork for expansive development centered around this technology.
研究领域:
环境科学
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分析化学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 24
·3909-3916
·
IF 5.047
Huan Feng,Yue Wang,Jianping Liu,Zhiqiang Zhang,Xinyi Yang,Rong Chen,Qingtao Meng,Run Zhang
Hypochlorous acid (HOCl) is closely related to human health and is widely used in our daily lives. Accordingly, detection of HOCl in live organisms and natural water samples is significantly important to human and animal health. In this paper, a novel chromogenic and fluorogenic probe (PI) was prepared for HOCl detection with high sensitivity and specificity. PI exhibits weak fluorescence emission owing to the intramolecular charge transfer (ICT) process from the carbazole to indandione unit. The oxidative cleavage of the alkene unit of PI induces the interruption of its π-conjugation, resulting in colorimetric and fluorogenic responses towards HOCl in PBS buffer. The detection limit of PI for HOCl was calculated to be as low as 24 nM. The fluorescence response of PI towards HOCl was found to be completed within 1 minute. PI exhibits high selectivity towards HOCl and low cytotoxicity, which allows it to be used as a fluorescent imaging probe for visualisation of exogenous and endogenous HOCl in live adult zebrafish and nude mice. Moreover, “naked-eye” analysis of the HOCl concentration in several natural water samples has been realized using PI-based test plates.
研究领域:
生物化学
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医学检测
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 121
·99664-99668
·
IF 3.84
Zheng Tang,Xiao-Ling Ding,Ying Liu,Zhi-Min Zhao,Bao-Xiang Zhao
We have developed a novel fluorescent probe (RBT) based on rhodamine B and benzothiazole hydrazine units for the detection of hypochlorite in living cells and real water samples with excellent selectivity and sensitivity. In the presence of hypochlorite in a mixture solution of MeCN–PBS (v/v = 3 : 7, pH = 7.4) at room temperature, the fluorescence intensity of RBT increased by 350 fold with the color change from colorless to red. The detection limit of the probe for hypochlorite is 1.06 × 10−9 M. Moreover, RBT was successfully used to image endogenous hypochlorite in living cells and detect hypochlorite in real water samples.
研究领域:
生物化学
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 73
·46148-46154
·
IF 3.108
Guoxing Yin,Ting Yu,Tingting Niu,Peng Yin,Haimin Chen,Youyu Zhang,Haitao Li,Shouzhuo Yao
Based on a strategy involving 2,4-dinitrophenyl ether and functionalized caged benzooxazolidinoindocyanine, a fluorescence turn-on probe for the selective detection of thiophenols was developed. Using the chemical properties of thiophenols, which are able to induce aromatic nucleophilic substitution (SNAr), and the principle of chemical-reaction-induced skeletal rearrangement, the probe (PBO) exhibits excellent selectivity for thiophenols with a detection limit of 7 nM. This probe features dramatic color changes and a significant fluorescence turn-on response (120 fold) after being treated with thiophenol. The applications of this new probe were demonstrated by the detection of thiophenol in real water samples and by fluorescence imaging of thiophenol in BEL-7402 cells.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
高影响因子
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