JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
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IF 3.306
Haochi Liu,Jie Ding,Ligang Chen,Lan Ding
A novel approach was proposed to prepare carbon dots (CDs) by acid carbonization and hydrothermal treatment of pork rib bones from food waste. The synthesized animal waste biomass CDs have the merits of eco-friendly, superior fluorescence properties and biocompatibility. The fluorescence of animal waste biomass CDs could be quenched efficiently by dithizone due to the coordination effect. With the addition of dimethoate, the dithizone ligands at CDs are replaced by hydrolysates, and hence the fluorescence is recovered. Thus, a sensing platform was constructed based on the coordination-originated fluorescence of animal waste biomass CDs which can sensitively and selectively detect dimethoate due to a simple displacement mechanism. Upon optimal conditions, the detection limit of dimethoate is 0.064 μM. The linear ranges were obtained in a range of 0.15 μM–5.0 μM. The method is rapid, convenient and environmentally acceptable that can directly detect dimethoate in water samples with recoveries of 93 %–105 %, and the relative standard deviations (RSDs) were 2 %–6 %, respectively. This simple strategy can be used to develop the fluorescence recovery sensors for chemical detection.
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
高影响因子
JOURNAL OF POLYMER RESEARCH
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2020
·Vol. 27
·期 7
·1-10
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IF 2.426
Li Paiwei,Dai Xin,Yan Qilin,Wang Zhenxi,Zhang Shangxi,Cao Meng
Dithizone is known to be very effective for heavy metal ions retention and widely used as developer in detection methods. To explore a novel surface modified polymer microspheres, this paper prepared a novel modified polystyrene (PS-g-D) microspheres by grafting dithizone as the complexing agent and developer on the surface of PS microspheres. The structure of PS-g-D was analyzed by FT-IR, and the formation of dithizone grafted PS microspheres was proved. The thermal stability and surface morphology of PS and modified PS were studied by TGA and SEM. PS-g-D had a uniform diameter of about 1 μm and exhibited a good thermal stability. The Pb 2+ removal increased and reached up to 99% with the decrease of initial Pb 2+ concentrations. The study of the isotherms model showed that the adsorption between PS-g-D and Pb 2+ is consistent with the Langmuir and Temkin adsorption isotherm models. The adsorption kinetics of PS-g-D is described well by the pseudo-second-order model. It can be seen that the modified PS microspheres exhibit a good adsorption property, and has real potential as a novel adsorbent for water treatment industry due to the introduction of dithizone as complexing agent and developer.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Wei Zhu,Jiejuan Tang,Ling Huang
Mercury-ion pollution in water is very dangerous to human health and ecological environments. It is necessary to propose a simple, fast and low-cost testing method for mercury-ion detection. Cold atomic spectrophotometers are often used for the detection of mercury ions, but because the instruments are expensive and cumbersome to operate, the method is only suitable for laboratories. In this work, we propose a simple electrochemical method for the determination of mercury ions based on a dithizone-modified glassy carbon electrode. The dithizone modification can significantly enhance the sensing performance of the electrode. Under optimized conditions, the proposed electrochemical sensor can linearly detect Hg(II) between 0.1 and 100 μg/L with a low detection limit of 17 ng/L.
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
Analytical Methods
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2014
·Vol. 7
·期 5
·2050-2054
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IF 1.938
Lei Zhang,Zhichao Xiong,Lingyi Zhang,Bohao Yu,Weibing Zhang
A magnetic solid-phase extraction method for detection of trace copper(II) was developed by graphite furnace atomic absorption spectrometry. A novel adsorbent, consisting of magnetic nanoparticles coated with dithizone (DZ)-modified chitosan, was prepared. The adsorbent was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and energy dispersive spectrometry (EDS). Effects of pH, amount of adsorbent, adsorption time, elution condition, interference ions and adsorption capacity on the detection of trace copper ion were studied. Under the optimized conditions, the detection limit of the developed method was 0.18 μg L−1 and the adsorption capacity was 210 mg g−1. This adsorbent was successfully applied to the analysis of environmental water samples and certified reference materials.
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
FOOD CHEMISTRY
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2023
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IF 8.8
Shuhua Li,Jizhong Wu,Shen Zhang,Tianhui Jiao,Jie Wei,Xiaomei Chen,Qingmin Chen,Quansheng Chen
Herein, we propose a method for detecting thiram based on the fluorescence inner filter effect using upconversion nanoparticles and dithizone–cadmium complexes (DZ-Cd 2+ ). The ultraviolet absorption of DZ-Cd 2+ was in the range of 480–600 nm under alkaline conditions, resulting in fluorescence quenching of the nanoparticles at 540 nm. Thiram had a stronger coordination effect with Cd 2+ than dithizone ; thus, more thiram–cadmium complex (T-Cd 2+ ) formed when thiram was added, leading to fluorescence recovery at 540 nm. The standard thiram curve was found to have a detection limit of 6.75 ng/mL in the linear range of 0.01–1000 µg/mL. In addition, high-performance liquid chromatography results for detecting thiram in apple samples revealed good application performance. The results demonstrate that the developed method has great potential to detect thiram residues in food.
研究领域:
分析化学
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纳米技术
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环境科学
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食品安全
✓ 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）