Capillary-electrophoretic determination of zinc and cadmium ions in aqueous solutions with ion-exchange preconcentration

Москвин, Л. Н.; Kamentsev, M. Ya.; Grigor'ev, G. L.; Yakimova, N. M.

doi:10.1134/s1061934810010193

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…Therefore, sensitive detection of Zn 2+ is desired to understand the physiological process. So far, several methods had been reported to detect Zn 2+ , such as ratiometric fluorescence, UV–vis spectroscopy, capillary electrophoresis, fluorescent nanosensor based on quantum dots, and CDs/fluorogenic zinc(II) probe quercetin (QCT-Zn 2+ ). − However, there were no reports about CD sensor of Zn 2+ by turning on their own fluorescence possessing reversible detection capability.…”

Section: Introductionmentioning

confidence: 99%

Reversible “Off–On” Fluorescence of Zn²⁺-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn²⁺

Yang¹,

Tang²,

Yang³

et al. 2018

Langmuir

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Zn-passivated carbon dots (named Z-CDs) were synthesized from zinc gluconate for the first time through a one-step pyrolysis treatment. The mechanism of Zn-enhanced fluorescence was carefully investigated, and a new strategy to passivate the surfaces of CDs by Zn was proposed. Inspired by the complexation reaction between Zn and ethylenediaminetetraacetic acid (EDTA), a reversible "off-on" fluorescent nanosensor for the detection of EDTA and Zn was constructed based on the depassivation and repassivation of Z-CDs, with a limit of detection as low as 3.2 × 10 M and 5.1 × 10 M, respectively. The proposed Z-CD-based nanosensor had been further utilized for EDTA and Zn monitoring in tap water with excellent recovery. To the best of our knowledge, this was the first report of a fluorescence-based sensor of EDTA and a turn-on sensor of Zn based on CDs with reversible detection capability. Also, benefiting from the low toxicity of zinc, Z-CDs were applied for multicolor bioimaging and in vitro detection in cells.

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Section: Introductionmentioning

confidence: 99%

Reversible “Off–On” Fluorescence of Zn²⁺-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn²⁺

Yang¹,

Tang²,

Yang³

et al. 2018

Langmuir

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“…Therefore, highly sensitive detection of Zn 2+ is important in terms of understanding physiological processes and the cause for certain diseases. Until now, several methods have been reported for the determination of Zn 2+ , such as ratiometric fluorescence [5], capillary electrophoresis [6], and UV-Vis spectroscopy [7]. However, novel methods are wishful for the sensitive detection of Zn 2+ in the biological system.…”

Section: Introductionmentioning

confidence: 99%

Fluorescent carbon dots for sensitive determination and intracellular imaging of zinc(II) ion

Yang

Kong

et al. 2015

Microchim Acta

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We describe the preparation of carbon dots (CDs) from glucose that possess high stability, a quantum yield of 0.32, and low toxicity (according to an MTT assay). They were used, in combination with the fluorogenic zinc(II) probe quercetin to establish a fluorescence resonance energy transfer (FRET) system for the determination of Zn(II). The CDs are acting as the donor, and the quercetin-Zn(II) complex as the acceptor. This is possible because of the strong overlap between the fluorescence spectrum of CDs and the absorption spectrum of the complex. The method enables Zn(II) to be determined in the 2 to 100 μM concentration range, with a 2 μM detection limit. The method was applied to image the distribution of Zn(II) ions in HeLa cells.

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“…In order to solve these problems, separation, preconcentration, and matrix elimination is usually required. Several methods have been used for separation and preconcentration of trace copper(II) in real samples, including LLE , ion‐exchange , precipitation/coprecipitation , flotation , cloud point extraction , and SPE . Among these methods, SPE procedures are considered superior to other techniques due to their simplicity, flexibility, more environment friendliness (due to consumption of small volumes of organic solvent), high enrichment factor, low cost, and short extraction time for sample preparation.…”

Section: Introductionmentioning

confidence: 99%

Novel modified carbon nanotubes as a selective sorbent for preconcentration and determination of trace copper ions in fruit samples

Rezvani

Ebrahimzadeh

Aliakbari

et al. 2014

J of Separation Science

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In this work, multiwalled carbon nanotubes were reacted with N-[3-(triet-hoxysilyl)propyl]isonicotinamide to prepare pyridine-functionalized carbon nanotubes. This novel sorbent was characterized by infrared spectroscopy, thermal and elemental analysis, and scanning electron microscopy. Functionalized carbon nanotubes were applied for the preconcentration and determination of copper ions using flame atomic absorption spectrometry. Various parameters such as sample pH, flow rate, eluent type and concentration, and its volume were optimized. Under optimal experimental conditions, the limit of detection, the relative standard deviation, and the recovery of the method were 0.65 ng/mL, 3.2% and 99.4%, respectively. After validating the method using standard reference materials, the new sorbent was applied for the extraction and determination of trace copper(II) ions in fruit samples.

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Capillary-electrophoretic determination of zinc and cadmium ions in aqueous solutions with ion-exchange preconcentration

Cited by 5 publications

References 4 publications

Reversible “Off–On” Fluorescence of Zn²⁺-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn²⁺

Reversible “Off–On” Fluorescence of Zn²⁺-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn²⁺

Fluorescent carbon dots for sensitive determination and intracellular imaging of zinc(II) ion

Novel modified carbon nanotubes as a selective sorbent for preconcentration and determination of trace copper ions in fruit samples

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Capillary-electrophoretic determination of zinc and cadmium ions in aqueous solutions with ion-exchange preconcentration

Cited by 5 publications

References 4 publications

Reversible “Off–On” Fluorescence of Zn2+-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn2+

Reversible “Off–On” Fluorescence of Zn2+-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn2+

Fluorescent carbon dots for sensitive determination and intracellular imaging of zinc(II) ion

Novel modified carbon nanotubes as a selective sorbent for preconcentration and determination of trace copper ions in fruit samples

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Reversible “Off–On” Fluorescence of Zn²⁺-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn²⁺

Reversible “Off–On” Fluorescence of Zn²⁺-Passivated Carbon Dots: Mechanism and Potential for the Detection of EDTA and Zn²⁺