Analytical Methods
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2013
·Vol. 6
·期 5
·1517-1522
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IF 1.855
Dong-Sheng Lin,Jia-Ping Lai,Hui Sun,Zhou Yang,Yue Zuo
In this paper, a fluorescein spirolactam derivative, ((E)-3′,6′-dihydroxy-2-((thiazol-2-ylmethylene)aminospiro[isoindoline-1,9′-xanthen]-3-one) (HTMIX), was synthesized and used as a turn-on fluorescence probe for the detection of silver ion in aqueous solution. The binding mechanism of HTMIX to Ag+ was evaluated using the Hildebrand–Benesi equation based on a 1 : 1 binding model with R = 0.9993. And the influence of sixteen common metal ions on the fluorescence intensities of HTMIX–Ag+ solution was investigated in detail. The results show that HTMIX exhibited high selectivity towards Ag+ in a 20% ethanol solution. The obtained fluorescence probe was used for the quantitative determination of Ag+ with a good linear range from 0.1 μM to 10 μM (R = 0.9969) and a satisfactory detection limit of 0.08 μM. In addition, the present probe has been further used for the detection of Ag+ in tap water, river water and lake water. And the accuracy of the results obtained by the proposed method was in good agreement with that obtained by flame atomic absorption spectrometry.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Huahua Cai,Xin Liu,Jing Zou,Junyang Xiao,Baoling Yuan,Fei Li,Qingfeng Cheng
In this study, a new spectrophotometric method was proposed for the measurement of hydrogen peroxide (H 2 O 2 ) in aqueous solutions. The method was based on the peroxidase (POD)-catalyzed reaction in which 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) was oxidized to form the stable green radical (ABTS + ). The generated ABTS + could be determined spectrophotometrically. The absorbance of the generated ABTS + at 415 nm, 650 nm, 732 nm and 820 nm were linear with H 2 O 2 concentrations in the range of 0–40 μM. The sensitivities of the proposed ABTS method for H 2 O 2 determination at 415 nm, 650 nm, 732 nm and 820 nm were 6.29 × 10 4 M −1 cm −1 , 2.00 × 10 4 M −1 cm −1 , 2.54 × 10 4 M −1 cm −1 and 1.89 × 10 4 M −1 cm −1 , respectively. The oxidation of ABTS to generate ABTS + in POD-catalyzed H 2 O 2 system at pH 6.0 was so fast that the determination time of the ABTS method was as short as 0.5 min. The stoichiometry of the reaction of H 2 O 2 and ABTS in the presence of POD was calculated as nearly 1:2 (1:1.92). The residual absorbance of the generated ABTS + was also found to be stable within 30 min in natural waters. Low H 2 O 2 concentration in rainwater could be both measured by the ABTS method and the DPD method with high accuracy, however, H 2 O 2 concentration in wastewater contained rhodamine B could only be accurately measured with the ABTS method at 732 nm. Moreover, waste solutions after H 2 O 2 analysis with the proposed ABTS method were non-hazardous towards E. coli .
研究领域:
分析化学
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环境科学
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生物化学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Shu Wang,Bingliang Zhang
Nitrilotriacetic acid (NTA) and ethylenediaminetetraacetic acid (EDTA), as widely used chelating agents, have created many environmental issues and raised much attention regarding their environmental occurrence. However, the determination of NTA and EDTA in samples of complex solution chemistry remains challenging. Here, we proposed a simple and sensitive method based on liquid chromatography tandem mass spectrometry (LC-MS/MS) to determine NTA and EDTA from aqueous samples without an enrichment step. During the analysis, H + -cation exchange was used to efficiently eliminate interference from metal ions. The intensity of NTA and EDTA with trimethylsilyldiazomethane methylation could be improved hundreds of times that of the virgin samples. To maximize sensitivity, the sample pretreatment methods, the derivatization procedures and the LC-MS/MS conditions were systematically optimized. The validated method showed low limits of quantification (0.4 μg/L for NTA and 1.5 μg/L for EDTA), a wide linear response (up to several mg/L, R 2 > 0.998), and good intra- and inter-day precision (relative standard deviation ≤ 11%). The reliability of this method was successfully validated by analysis of authentic water samples collected from three WWTPs and one river with satisfactory recoveries (80–117%). It can be proposed as a powerful analytical method of NTA and EDTA in authentic water samples and could potentially be adapted to detect other chelates and polydentate compounds.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
Journal of Nanomaterials
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2021
·
IF 2.986
Nguyen Tuan Anh,Ngo Xuan Dinh,Hoang Van Tuan,Tran Hung Thuan,Le Minh Tung,Van Phan Le,Doan Quang Tri,Anh-Tuan Le
Thiram plays a critical role in protecting fruits and vegetables from damage by various crop diseases, but its residues significantly affect the environment, such as soil and water pollution, and becoming a serious threat to human health. Herein, Tween 80-capped copper nanoparticles (Tween 80-CuNPs) were developed as a convenient and low-cost colorimetric probe for selective detection of thiram pesticide. In the presence of thiram, the color of Tween 80-capped CuNPs changed from dark brown to olive green and colorless at high thiram concentrations. The Tween 80-capped CuNPs-based colorimetric probe exhibited good selectivity and high sensitivity (LOD about 0.17 μM) with a high linearity level in the calibration range of 0.5–25 μM of thiram concentrations. The thiram limit of detection (LOD) of proposed sensor is lower than the maximum residue limit (MRL) regulated by the governments of EU and Vietnam. Moreover, the proposed sensor was successfully applied to determine thiram in tap water with percentage recovery of 98-107% and high repeatability (). The obtained results indicated that Tween 80-capped CuNPs would become a cost-effective sensing platform for ultrahigh-sensitive thiram determination in the environmental water samples.
研究领域:
环境科学
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分析化学
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纳米技术
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
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2024
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IF 2.6
Dai Zhengyuan,Liu Hao,Sun Xuyuan,Wang Ying,Fan Jie,Li Li,Ding Yaping
Using o-phenylenediamine as carbon source and phytic acid as phosphorus source, two P-rich carbon quantum dots RCDs and BCDs were synthesized successfully by changing the reaction temperature and time of hydrothermal method. It was found that RCDs with red emission could realize sensitive detection of 2-methylimidazole, and 2-methylimidazole had no obvious quenching effect on BCDs with blue emission, which made RCDs a sensitive, quick and selective fluorescence sensor for 2-methylimidazole detection. Under the optimal experimental conditions, the fluorescence intensity of RCDs decreased with the increasing of 2-methylimidazole concentration. The detection of 2-methylimidazole concentration by the carbon quantum dots sensor showed a good linear relationship in the range of 5 ~ 110 µM, and the low detection limit was 0.61 µM (S/N = 3). The sensor is able to detect 2-methylimidazole in lake water, enabling the application of real samples. The results show that this work provides a simple fluorescence method to detect 2-methylimidazole in water.
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
SPECTROSCOPY LETTERS
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2014
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IF 0.718
Rui-Yong Wang,Jing Wu,Lv-Jing Wang,Rui Wang,Huan-Jing Dou
Water-soluble and stable CdTe quantum dots were synthesized in aqueous solution with thioglycolic acid as the stabilizer. A spectrofluorometric method for the determination of iron (II) has been developed based on quenching of the fluorescence of CdTe quantum dots by iron (II) in aqueous solutions. It can perform an accurate and simple determination of iron (II) concentration in water samples. Under optimum conditions, the quenched fluorescence intensity increased linearly with the concentration of iron (II) ranging from 5.0 × 10−8 to 4.0 × 10−6 mol/L with a correlation coefficient R = 0.9969. The limit of detection for iron (II) was found to be 1.2 × 10−8 mol/L. As an application, the proposed method was successfully applied to the analysis of iron (II) in water samples, and the results were satisfactory.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Dongmei Liu,Xuejia Chen,Hui Zeng,Chang Liu,Biyu Tang,Yan Li,Lishan Zhang,Min Zhang
In this work, a novel, low-cost soap-film sensor for detecting ammonia in environmental water and saliva was developed. A 3D printed circular frame with two stainless steel electrodes was implemented as a carrier for a soap film. The soap film was manually generated by pulling the 3D printed frame from a mixture solution containing 20.7 g/L gelatin, 241.4 mL/L Glycerol, 34.5 mL/L Triton X-100 and 100 mM boric acid . The conductivity of the soap film was measured with a lab-made detector. For liquid sample analysis, sample and NaOH solution were mixed in a reagent bottle as the gas-diffusion vessel (GDV). The released ammonia from the reaction was then diffused into the headspace of the GDV and absorbed by the soap film. The conductivity increasing rate of the soap film was used for quantifying the ammonium concentration in sample. The analytical performance parameters were demonstrated, including a linear range of 0–500 μM, a relative standard deviation of 3.2 % ( n = 10), and a limit of detection of 14 μM (0.2 mg N/L). This method showed a 90–110 % recovery rate for saliva and water samples. Compared to a reference indophenol blue method, the relative deviations of two method were less than 7.4 % ( n = 33). The proposed method is easy to operate, and the device itself is compact and low cost. The soap-film sensor enables rapid renewal to avoid contamination.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
CHROMATOGRAPHIA
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2017
·Vol. 80
·期 3
·463-471
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IF 1.402
Xu Mei,Chen Kun,Luo Chen,Song Guoxin,Hu Yaoming,Cheng Hefa
Abstract In this paper, a simple but efficient method for the extraction and analysis of bifenthrin in water samples was proposed. The Fe 3 O 4 -based nanocomposites (Fe 3 O 4 @m-SiO 2 /PSA@Zr-MOF) were successfully synthesized and developed as adsorbents for magnetic solid-phase extraction. With the solvothermal reaction and sol–gel method, the resultant adsorbents exhibited excellent characteristics of large surface areas, homogeneous pore size, strong magnetic responsivity and high hydrophilicity. The parameters affecting the extraction performance including adsorbent amounts, adsorption time, species of eluents and desorption time were investigated. Under the optimal conditions, validation experiments such as recovery, reproducibility and limits of detection (LOD) were carried out and showed satisfactory results. The LOD of the targeted analytes was found to be 0.5 μg L −1 . The average recovery was 103.2% with the intra-day and inter-day relative standard deviations of 2.0 and 3.5%, respectively. Ultimately, the novel magnetic adsorbents were successfully applied to detect the bifenthrin compound in real water samples. Graphical Abstract
研究领域:
环境科学
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分析化学
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DOI
高影响因子
MICROCHIMICA ACTA
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2011
·Vol. 176
·期 3
·359-366
·
IF 2.578
Cui Yang,Hu Zhang-Jun,Yang Jia-Xiang,Gao Hong-Wen
We have covalently grafted phenyl-iminodiacetic acid groups onto multi-walled carbon nanotubes via a diazotation reaction. The resulting material was characterized by FT-IR and UV–vis spectroscopy, by TGA, XPS and SEM. It is shown to be a valuable solid-phase extraction adsorbent for the preconcentration of trace quantities of Fe(III), Cu(II) and Pb(II) ion from aqueous solution prior to their determination by ICP-OES. Various factors affectting the separation and preconcentration were investigated. The enrichment factor typically is 100. Under optimized experimental conditions, the maximum adsorption capacities for Fe(III), Cu(II) and Pb (II) are 64.5, 30.5 and 17.0 mg g-1, respectively, the detection limits are 0.26, 0.15 and 0.18 ng mL-1, and the relative standard deviations are <2.5% ( n = 6). The new adsorbent shows superior reusability and stability. The procedure was successfully applied to the determination of trace quantities of Fe(III), Cu(II) and Pb (II) in water samples.
Multiwalled carbon nanotubes grafted with phenyl-iminodiacetic acid (PIDA-MWCNTs) is prepared and employed as solid phase extraction sorbent to determinate the trace Fe(III), Cu(II) and Pb (II) in water samples. The method has been applied to the preconcentration of trace amount of Fe(III), Cu(II) and Pb (II) in water samples with satisfactory results.
研究领域:
环境化学
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分析化学
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材料科学
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水污染监测
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痕量金属检测
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2014
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IF 3.84
Qian Liu,Ping Jiang,Zonghua Pu,Abdullah M. Asiri,Abdulrahman O. Al-Youbi,Xuping Sun
In this paper, we demonstrate the first use of BCNO nanoparticles (BCNO NPs) as a novel highly efficient fluorosensor for Cu 2+ detection with high selectivity. The detection process is ultrafast and can be completed within 2 min, and the detection limit is 0.1 μM. We also show the practical use of this sensor for Cu 2+ determination in real water samples.
研究领域:
化学传感器
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环境科学
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材料科学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2015
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IF 6.409
Lihua Jin,Zaihua Zhang,Anwen Tang,Cong Li,Yehua Shen
In this work, we have presented a novel strategy to utilize as-synthesized yeast extract-stabilized Cu nanoclusters (Cu NCs) for sensitive and selective detection of S 2− . The fluorescence intensity of Cu NCs was enhanced significantly in the presence of both Na 2 S 2 O 8 and S 2− . By virtue of this specific response, a Cu NC-based fluorescent turn-on sensor was developed, which allows the detection of S 2− in the range of 0.02–0.8 μM with a detection limit of 10 nM. The enhancing mechanism was also discussed based on fluorescence decay , transmission electron microscopy (TEM) and dynamic light scattering (DLS) studies, indicating that S 2− enhanced the Cu NCs emission mainly through sulfide-induced aggregation of Cu NCs. Furthermore, we demonstrated the usability of the present approach for the detection of S 2− in water samples, which illustrates its great potential for the environmental monitoring and water quality inspection fields.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2022
·
IF 5.304
Jinjie Xu,Yuehong Pang,Zhuying Yan,Xiaofang Shen
Glyphosate, a widely used herbicide, is prone to residue in the environment that may cause harm to humans. In this work, titanium ion-modified melamine foams (MF/PDA/Ti 4+ ) were prepared as sorbents to achieve rapid extraction of glyphosate by pipette-tip solid-phase extraction (PTSPE). The MF/PDA/Ti 4+ was characterized by SEM, EDS, XPS, and TGA, and its adsorption properties were evaluated by adsorption kinetics and isotherm experiments. The porous structure and good mechanical properties of MF made the MF/PDA/Ti 4+ fill into the pipette-tip easily and could achieve low back pressure. The developed PTSPE method showcased short extraction time (<2 min) for glyphosate and the limits of detection (LOD, 3σ/k) was 4.9 μg/L. It was applied in aqueous samples (tap water, lake water, tea drink, and orange juice) with recoveries ranging from 82.8 % to 108.2 % and the relative standard deviation (RSD, n = 3) was less than 7.7 %, demonstrating broad perspectives on the extraction of glyphosate from the aquatic and terrestrial environment.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）