Multisyringe flow injection analysis for the spectrophotometric determination of uranium (VI) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol

Danchana, Kaewta; Souza, Cheilane T. de; Palacio, Edwin; Cerdà, Vı́ctor

doi:10.1016/j.microc.2019.104148

Cited by 11 publications

(7 citation statements)

References 37 publications

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“…The limit of detection (LOD, 3σ/k) was deduced to be 0.07 μmol L −1 (27.6 μg•L −1 ), which was below the maximum pollution level of UO2 2+ in drinking water stipulated by the World Health Organization (30 μg•L −1 ) [30]. Compared with the reported sensing system, the present colorimetric strategy also offered superior sensitivity toward UO2 2+ detection (Figure 4C) [31][32][33][34][35][36][37], contributed by the efficient light-triggered oxidaselike activity of TAS-COF. The sensing selectivity is of particular significance in practical applications.…”

Section: Analytical Performance For Uo2 2+ Detectionmentioning

confidence: 79%

Visible Light-Responsive Sulfone-Based Covalent Organic Framework as Metal-Free Nanoenzyme for Visual Colorimetric Determination of Uranium

Jiang

Chen

2022

Chemosensors

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Covalent organic framework (COF) has been attracting considerable attention as a novel crystalline material owing to its extended π-electron conjugation and excellent spectral behavior. In this study, we present an imine-linked two-dimensional (2D) crystalline sulfone-based covalent organic framework (TAS-COF) synthesized by 2,4,6-triformylphloroglucinol (Tp) and 3,7-diaminodibenzo[b,d]thiophene (DAS) via a Schiff base condensation reaction. The benzothiophene sulfone endows the as-synthesized TAS-COF with excellent oxidase-like activity under visible light irradiation, ascribed to the generation of superoxide radicals (O2•−) by photo-generated electron transfer. TAS-COF can efficiently oxidase the colorless substrate 3,3′,5,5′-tetramethylbenzydine (TMB) into blue oxidized TMB (oxTMB) when exposed to visible light, and the presence of uranium (UO22+) leads to clear color fading due to the coordination between the imine of oxTMB and UO22+. A colorimetric strategy is thus developed for UO22+ determination with a detection limit of 0.07 μmol L−1. Moreover, a paper-based visual sensing platform is also constructed to offer simple and fast UO22+ content evaluation in water samples. The present study not only provides a promising strategy to prepare visible light-triggered COF-based metal-free nanoenzymes but also extends the applications of COF material in radionuclide detection.

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Section: Analytical Performance For Uo2 2+ Detectionmentioning

confidence: 79%

Visible Light-Responsive Sulfone-Based Covalent Organic Framework as Metal-Free Nanoenzyme for Visual Colorimetric Determination of Uranium

Jiang

Chen

2022

Chemosensors

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“…It is known to cause serious toxicological effects to humans and its compounds are carcinogenic. It reaches the environment by leaching from natural deposits, releasing waste from nuclear power plants, and the combustion of coal and other fuels [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…According to the World Nuclear Association (WNA), it is estimated that there are 6.14 million tons of uranium in mines around the world. From this amount, Brazil represents about 5% [ 5 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…There are several reported techniques capable of detecting uranium in environmental samples, such as: fluorometry [ 8 , 9 ], X-ray fluorescence [ 10 , 11 ], potentiometry [ 12 , 13 ], inductively coupled plasma emission spectrometry (ICP OES) [ 14 , 15 , 16 ], inductively coupled plasma mass spectrometry (ICP-MS) [ 17 , 18 ], and spectrophotometry [ 5 , 19 , 20 , 21 , 22 , 23 ]. Among all these techniques, spectrophotometry has a lot of applications.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

et al. 2023

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This work proposes the synthesis of a new polymer with imprinted ions (IIP) for the pre-concentration of uranium in natural waters using digital imaging as a detection technique. The polymer was synthesized using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) for complex formation, ethylene glycol dimethacrylate (EGDMA) as a crosslinking reagent, methacrylic acid (AMA) as functional monomer, and 2,2′-azobisisobutyronitrile as a radical initiator. The IIP was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy (FTIR). Uranium determination was performed using digital imaging (ID), and some experimental conditions (sample pH, eluent concentration, and sampling flow rate) were optimized using a two-level full factorial design and Doelhert response surface methodology. Thus, using the optimized conditions, the system allowed the determination of uranium with detection and quantification limits of 2.55 and 8.51 µg L−1, respectively, and a pre-concentration factor of 8.2. All parameters were determined using a 25 mL sample volume. The precision expressed as relative deviation (RSD%) was 3.5% for a solution with a concentration of 50 µg L−1. Given this, the proposed method was used for the determination of uranium in four samples of natural waters collected in the city of Caetité, Bahia, Brazil. The concentrations obtained ranged from 35 to 75.4 μg L−1. The accuracy was evaluated by the addition/recovery test, and the values found ranged between 91 and 109%.

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“…Therefore, timely and accurate detection of trace amounts of uranium in the environment is essential for both healthy life and environmental protection [6] . There are many methods for the detection of uranium, such as capillary zone electrophoresis, [7] inductively coupled plasma emission spectroscopy, [8] ion chromatography, [9] inductively coupled plasma mass spectrometry, [10] graphite furnace atomic absorption spectrometry, [11] spectrophotometry, [12] fluorescence [13] and neutron activation analysis [14] . Although these schemes offer the advantages of high sensitivity and low detection limits, they require expensive equipment as well as higher operating costs.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide modified H₄L‐ion imprinting electrochemical sensor for the detection of uranyl ions

Wang

Liu

et al. 2021

Zeitschrift anorg allge chemie

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The rapid development of the nuclear industry has gradually aroused people′s attention to the problem of nuclear pollution. Due to the biological toxicity of uranium and its aqueous solution, simple and rapid detection of uranium in the water environment is quite important. An ion imprinted carbon nanomaterial (graphene oxide) electrochemical sensor for the detection of trace uranyl ions was prepared by using the synthesized bipolar tetradentate macrocyclic uranyl ligand cyclo‐bis‐phenylenediamine‐bis‐(phenylmethyl‐diphyrrolecarbaldehyde) (H4L) as functional monomer. The sol‐gel polymer was prepared by hydrolysis and polymerization of H4L ligand, 3‐aminopropyltrimethoxysilane and tetraethoxysilane. H4L‐ion imprinted polymer (U‐IIP) was prepared by adding 1 mM uranyl ion as template ions. Then the polymer was bonded to graphene oxide modified carbon paste electrode, and the template ions were eluted to obtain H4L‐ion imprinted‐graphene oxide modified carbon paste electrode (U‐IIP/GO/CPE). Differential pulse voltammetry was used to detect trace uranyl ions. The results showed that the U‐IIP/GO/CPE sensor system can detect uranyl ions with high sensitivity and specificity, and the peak current appeared around −0.26v. In the range of 0.01 μM∼3.0 μM, the detection current had a good linear relationship with the molar concentration of uranyl ions, and the method detection limit was 1.32 nM (S/N=3). Through the detection of actual samples, it had a good acceptable recovery rate (95.45 %∼106.25 %), and the relative standard deviation was less than 3.25 %.

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Multisyringe flow injection analysis for the spectrophotometric determination of uranium (VI) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol

Cited by 11 publications

References 37 publications

Visible Light-Responsive Sulfone-Based Covalent Organic Framework as Metal-Free Nanoenzyme for Visual Colorimetric Determination of Uranium

Visible Light-Responsive Sulfone-Based Covalent Organic Framework as Metal-Free Nanoenzyme for Visual Colorimetric Determination of Uranium

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

Graphene oxide modified H₄L‐ion imprinting electrochemical sensor for the detection of uranyl ions

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Multisyringe flow injection analysis for the spectrophotometric determination of uranium (VI) with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol

Cited by 11 publications

References 37 publications

Visible Light-Responsive Sulfone-Based Covalent Organic Framework as Metal-Free Nanoenzyme for Visual Colorimetric Determination of Uranium

Visible Light-Responsive Sulfone-Based Covalent Organic Framework as Metal-Free Nanoenzyme for Visual Colorimetric Determination of Uranium

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

Graphene oxide modified H4L‐ion imprinting electrochemical sensor for the detection of uranyl ions

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Product

Resources

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Graphene oxide modified H₄L‐ion imprinting electrochemical sensor for the detection of uranyl ions