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
·
环境科学
·
生物催化
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Kai Wang,Ya-Xi Ye,Cheng-Yan Jiang,Meng-Ya Guo,Xiang-Yang Zhang,Ai-Qin Jiang,Yu-Shun Yang,Qing-Cai Jiao,Hai-Liang Zhu
Hydrazine is a very important industrial chemical with high toxicity to the human body. In this work, a fluorescent probe HZ , based on the substitution-cyclization-elimination cascade which initiated by hydrazine, was designed and synthesized. HZ had various characteristics such as high selectivity, high sensitivity, fast detection speed, wide application range, and so on. After treating with hydrazine, the fluorescence signal of HZ at 520 nm in aqueous solution was significantly enhanced. Furthermore, HZ had the linear range of 1–10 equivalent for monitoring hydrazine, and the solution showed a colorless to yellow color change. In practical application, the detection limit of HZ for the detection of hydrazine was only 0.75 μM, which could be utilized for trace detection of hydrazine in different water samples. These indicated that HZ had a broad application prospect in the fields of environmental protection and water treatment. This work not only provided a useful instrument for the detection of the ecological environment but also supplied important information for the system optimization of other ecological environment detectors. In addition, HZ could monitor endogenous and exogenous hydrazine in MCF-7 cells successfully, which demonstrated its potential for practical application in complex biological systems.
研究领域:
环境科学
·
分析化学
·
生物学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Yinyin Wang,Yun Ai,Yilin Zhang,Yuanyuan Ren,Jilin Wang,Fangyuan Yao,Wenyu Li,Ying Zhou,Yanni Sun,Jianli Liu,Cuiling Wang
A new probe TR-V (Indolo[2,1–b]quinazoline-6,12-dione,6-{(6Z),(2′E)-2′- [(2-hydroxy-3-methoxyphenyl)methylene]hydra zinylidene}) based on tryptanthrin has been synthesized for selective and rapid detection of Cu 2+ . The synthetic route is facile, economical and viable. TR-V reacts in Tris-HCl buffer solution (pH = 8.0) with cupric to a deep yellow chelate which has a significant peak at 450 nm in the UV–Vis spectra. The reaction is instantaneous, ranging from light yellow to dark yellow and the change in color can be observed with the naked eye. Over 13 competitive metal ions do not interfere in the determination. The detection limit is 84 nM (R 2 = 0.9998). Thus, this method was selected for the analysis of copper ions in tap, bottled water and traditional Chinese medicine samples under optimized experimental conditions.
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
JOURNAL OF CHROMATOGRAPHY A
·
2014
·
IF 4.258
Chun Wang,Ruiyang Ma,Qiuhua Wu,Meng Sun,Zhi Wang
In this paper, porous carbon with a highly ordered structure was synthesized using zeolite ZSM-5 as a template and sucrose as a carbon source. Through the in situ reduction of Fe 3+ , magnetic property was successfully introduced into the ordered porous carbon, resulting in a magnetic porous carbon (MPC). MPC was used as an adsorbent for the extraction of some chlorophenols (2-chlorophenol, 3-chlorophenol, 2,3-dichlorophenol and 3,4-dichlorophenol) from water and peach juice samples followed by high performance liquid chromatography-ultraviolet detection. Good linearity was observed in the range 1.0–100.0 ng mL −1 and 2.0–100.0 ng mL −1 for water and peach juice sample, respectively. The limits of detection ( S / N = 3) were between 0.10 and 0.30 ng mL −1 . The relative standard deviations were less than 5.3% and the recoveries of the method for the compounds were in the range from 87.8% to 102.3%. The results demonstrated that the MPC had a high adsorptive capability toward the four chlorophenols from water and peach juice samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Yongli Liu,Xiaoyan Su,Huanjia Liu,Guifen Zhu,Guobei Ge,Yuxin Wang,Penghui Zhou,Qingxiang Zhou
In present work, blue carbon dots (b-CDs) were derived from ammonium citrate and guanidine hydrochloride, and red carbon dots (r-CDs) were stemmed from malonate, ethylenediamine and meso‑tetra (4-carboxyphenyl) porphin based on facile hydrothermal method . Eco-friendly ratiometric fluorescence probe was innovatively constructed to effectively measure Hg 2+ utilizing b-CDs and r-CDs. The developed probe displayed two typical emission peaks at 450 nm from b-CDs and 650 nm from r-CDs under the excitation at 360 nm. Mercury ion has strong quenching effect on the fluorescence intensity at 450 nm due to the electron transfer process and the fluorescence change at 450 nm was used as the response signal, whereas the fluorescence intensity at 650 nm kept unchangeable which resulted from the chemical inertness between Hg 2+ and r-CDs, serving as the reference signal in the sensing system. Under optimal circumstances, this probe exhibited an excellent linearity between the fluorescence response values of ΔF 450 /F 650 and Hg 2+ concentrations over range of 0.01–10 µmol/L, and the limit of detection was down to 5.3 nmol/L. Furthermore, this probe was successfully employed for sensing Hg 2+ in practical environmental water samples with satisfied recoveries of 98.5%–105.0%. The constructed ratiometric fluorescent probe provided a rapid, environmental-friendly, reliable, and efficient platform for measuring trace Hg 2+ in environmental field.
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
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
·
环境科学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Zhi Yuan Xie,Wan Xiang Qiu,Zi Yi Xu,Nian Bing Li,Hong Qun Luo
Hydrogen sulfide (H 2 S) has a comprehensive contribution to the normal operation and stability of organisms and is also present in environmental water samples and food deterioration. Thus, it is exceedingly promising and significant to develop a highly sensitive detection technique for tracing H 2 S. Inspired by this, we designed and synthesized a new fluorescent probe 2-[3-[2-[3-bromo-4-(2,4- dinitrobenzenesulfonate)] ethenyl]-5,5-dimethyl-2-cyclohexen-1-ylidene]propanedinitrile (SP-Br) for hydrosulfide ion detection by introducing bromine atom. Compared with reported H 2 S probes based on the same fluorescent parent, SP-Br has longer fluorescence emission (λ em = 670 nm), shorter response time (3 min), lower detection limit (149 nM), and wider detection range (0–30 nM). SP-Br can emit weak yellow fluorescence, and the emission intensity at 670 nm is considerably enhanced in the presence of hydrosulfide ions. The identification mechanism of hydrosulfide ion by SP-Br was verified by high-resolution mass spectrometry, fluorescence, and UV–vis absorption spectroscopy. In addition, SP-Br has been successfully applied to the monitoring of actual water samples and beer samples and has certain development prospects and value in the fields of environmental pollution and food quality analysis.
研究领域:
生物化学
·
环境科学
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 315
·期 1
·103-110
·
IF 1.282
Wang Zhongtang,Lin Jinxian,Li Sixuan,Guo Qiuju,Huang Wenna,Wen Wei,Dan Guiping,Tan Zhaoyi
To rapidly assess the contamination of actinides in emergency water, a method was developed to simultaneously analyze U, Th, Pu and Am. The method consists of two steps: extraction chromatographic separation using UTEVA and DGA resins and isotopic determination of actinides by inductively coupled plasma mass spectrometry (ICPMS). The whole analytical procedure takes only 8 h and high chemical recoveries of actinides were obtained. The cross spectral interferences between actinides in ICPMS measurement were sufficiently removed. The accuracy was validated by analyzing IAEA-443 seawater sample. The low limits of detection of actinides allow this method to distinguish low level contamination.
研究领域:
环境科学
·
核化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD AND AGRICULTURAL IMMUNOLOGY
·
2019
·
IF 2.398
Xiujin Chen,Zhaozhou Li,Fengxia Sun,Xiaotian Cao,Yao Wang,Li Cao,Hongli Gao,Dong Gao,Yawen Wang
Tebuconazole is widely applied for controlling pathogenic fungi of crops and proved hazardous to human being. To better measure tebuconazole residues, an enzyme-linked immunosorbent assay for screening tebuconazole residues in aqueous samples was established using an innovative hapten (hapten1) designed via molecular model. The work concentration of calibration standard curves based on aqueous matrices ranged from 0.51 to 10.71 ng mL–1. The cross-reactivities of other analogs were less than 6%. The detection limits of the assay were in the range of 0.197–0.297 ng mL–1 for tebuconazole in water samples. The average recoveries of tebuconazole in the spiked water samples varied from 76.76% to 107.52% with the variation coefficient scope of 4.54–13.26%. The obtained immunoassay was verified by gas chromatography coupled to mass spectrometry with high correlation coefficients (r > 0.9868). Herein, the proposed immunoassay offers a cost-effective, convenient, reliable tool for the determination of tebuconazole residues in aqueous samples.
研究领域:
环境科学
·
分析化学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2023
·Vol. 38
·期 2
·159-165
·
IF 2.9
Linlin Lv,Weiwei Luo,Yixiao Zhou,Tiechun Li,Quanping Diao,Pinyi Ma,Daqian Song
Hydrazine (N 2 H 4 ) is a highly toxic and harmful chemical reagent. Fluorescent probes are simple and efficient tools for sensitive monitoring of N 2 H 4 enrichment in the environment, humans, animals, and plants. In this work, a ratiometric fluorescent probe (FP-1) containing coumarin was used for hydrazine detection. The proposed FP-1 probe had a linear detection range of 0–250 μM and a limit of detection (LOD) of 0.059 μM (1.89 ppb). A large red Stokes shift was observed in fluorescence and UV–vis absorption spectra due to the hydrolysis of ester bonds between FP-1 and hydrazine. The hydrazine detection mechanism of FP-1 was also investigated using density functional theory (DFT) calculations. Finally, FP-1 could sensitively and selectively monitor hydrazine in actual water samples and BEAS-2B cells. Therefore, it has great application potential in environmental monitoring and disease diagnosis.
研究领域:
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2021
·Vol. 36
·期 6
·1469-1475
·
IF 2.464
Xiping Mei,Dongxiu Wang,Lin Zhang,Junfen Li,Chuan Dong
Fifty-four Eucommia ulmoides leaves were subjected to a hydrothermal technique to synthesize carbon dots (CDs) of 3.55 ± 1.45 nm size. The nanomaterial possessed excellent stability and strong fluorescence emission (φ f 42.3%). In a neutral buffer solution, the fluorescence signals of CDs solution were enhanced by aluminium ion without interference from other ions. Degree of enhancement correlated linearly with the Al 3+ content in the range 0.01–2.5 mM. Response of this method was fast and sensitive (detection limit was 23 nM). The CDs performed successfully as a sensitive sensor for trace Al 3+ determination in water samples, and satisfactory results were obtained.
研究领域:
纳米材料科学
·
环境监测
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Xiwen Liu,Qingkun Hu,Yuanjun Tong,Nan Li,Sai Ouyang,Huangsheng Yang,Jianqiao Xu,Gangfeng Ouyang
Solid-phase extraction (SPE) is a popular technique for environmental sample pretreatment . However, SPE usually requires complex sample pretreatment processes, which is time-consuming and inconvenient for real-time and on-site monitoring. Herein, a solvent-free, rapid, and user-friendly SPE device was developed by coating the polydimethylsiloxane (PDMS)/divinylbenzene (DVB) sorbent on the inner wall of a sample bottle. The extraction process and desorption process were both carried out in the bottle. The analytes trapped in the sorbent were thermally desorbed and simultaneously sucked out from the bottle by an air sampling tube equipped on field-portable GC-MS. Different to previous work, the sample pretreatment process didn’t require any complicated and time-consuming steps, such as centrifugation or filtration. The total analysis time for each sample was less than 25 min, which was feasible for rapid on-site detection, and thus avoided the losses and contamination of samples in conventional sample storage and transportation processes. Under optimal conditions, the proposed SPE method exhibited wide linear ranges, low detection limits (0.010–0.036 μg L −1 , which were much lower than the maximum levels restricted by the US Environmental Protection Agency and the Chinese GB3838-2002 standard), good intra-bottle repeatability (6.13–7.17%, n = 3) and satisfactory inter-bottle reproducibility (4.73–6.47%, n = 3). Finally, the method was successfully applied to the rapid detection of BTEX in the field. The recoveries of BTEX in spiked water samples ranged from 89.1% to 116.2%. This work presents a novel SPE approach for rapid on-site monitoring in water samples.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
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