Determination of iron(III) with salicylic acid by the fluorescence quenching method

Cha, Ki-Won; Park, Kwang‐Won

doi:10.1016/s0039-9140(98)00032-0

Cited by 71 publications

(31 citation statements)

References 5 publications

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“…So, the quantitative determination of total dissolved iron is important for biology as well as the environment. Many techniques have been developed to detect and quantify iron such as atomic absorption spectrometry [7], inductively coupled plasma-mass spectrometry (ICP-MS) [8], inductively coupled optical emission spectrometry [9], flow injection analysis [10] and fluorescence [11]. However, most analytical methods are based on relatively expensive instrument.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide-assisted synthesis of bismuth nanosheets for catalytic stripping voltammetric determination of iron in coastal waters

Pan

Lin

et al. 2015

Microchim Acta

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The article describes the synthesis of bismuth nanosheets (BiNSs) in the presence of a small quantity of graphene oxide (GO) which is helpful for the formation of twodimensional BiNSs and improves dispersity. The material, when placed on a glassy carbon electrode (GCE), is shown to enable catalytic stripping voltammetric determination of total dissolved iron without the need for adding a complexing agent. The average thickness and length of the BiNSs are 3 to 4 nm and 100 to 200 nm, respectively. The unique nanostructure of the BiNSs, the ability of Bi to form alloys with metal, and the current amplification of the catalytic system make the modified GCE an excellent choice for electrochemical determination of Fe(III). Under the optimal conditions, the electrode has a linear response to Fe(III) in the 0.01 to 20 μM concentrations range, with a lower detection limit of 2.3 nM.The electrode was successfully applied to the sensitive determination of Fe(III) in coastal waters.

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Section: Introductionmentioning

confidence: 99%

Graphene oxide-assisted synthesis of bismuth nanosheets for catalytic stripping voltammetric determination of iron in coastal waters

Pan

Lin

et al. 2015

Microchim Acta

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“…Therefore, accurate determination of iron in natural water is of significant interest because of its abundance and variable oxidation states in the environment. Many analytical methods such as spectrophotometry and flow injection analysis [7], Fluorescence [8], electrothermal atomic absorption spectrometry [9], inductively coupled plasma optical emission spectrometry [10], inductively coupled plasma-mass spectrometry [11], chemiluminescence [12], and electrochemical methods [13,14] have been developed for the determination of iron. Although the spectrophotometric methods have been widely used, the size and weight of the instruments limit their use for in situ experiments.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric determination of total dissolved iron in coastal waters using a glassy carbon electrode modified with reduced graphene oxide, Methylene Blue and gold nanoparticles

et al. 2014

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A nanocomposite, prepared from reduced graphene oxide (rGO), Methylene Blue (MB) and gold nanoparticles (AuNPs), was used to modify a glassy carbon electrode for the determination of total dissolved iron by differential pulse voltammetry. The use of rGO warrants a larger electrode surface and the presence of more active sites, while electron transfer is accelerated by incorporating AuNPs. MB acts as an electron mediator, as an anchor for the AuNPs (which were grown in situ), and also prevents the aggregation of rGO. The modified electrode displayed a remarkably improved sensitivity and selectivity for Fe(III). The kinetics of the electrode reaction is adsorption-controlled, and the reversible process involves one proton and one electron. The response to Fe(III) is linear in the 0.3 to 100 μM concentration range, and the detection limit is 15 nM. Possible interferences by other ions were studied. The electrode was successfully applied to the determination of total dissolved iron in real coastal waters.

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“…In contrast, the quenching effect has also been utilized in some cases to determine metal ions, where the fluorescence intensity of fluorophore (ligand) decreases with the concentration of metal ion. The fluorescence quenching method using available or synthesized fluorogenic reagent has been applied to the determination of metal ions, [17][18][19][20][21] …”

Section: Introductionmentioning

confidence: 99%

Spectrofluorimetric Determination of Cu2+ Using New Fluorogenic Reagent

Sorouraddin¹,

Rashidi

Shabani

et al. 2005

Chin. J. Chem.

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A new synthesized fluorogenic reagent, 8-[(2-pyridine)methylideneamino] quinoline (PMAQ), was utilized for spectrofluorimetric determination of Cu(II) at trace levels. PMAQ, a good fluorogenic reagent, though insoluble in water, but is soluble in ethanol and 20% ethanol-water. The excitation and the fluorescence wavelengths of PMAQ were 310 and 434 nm respectively. When the reagent was complexed with Cu(II), the fluorescence intensity decreased proportionally with the concentration of Cu(II) at pH 4.5 by a static quenching effect. The highest sensitivity to Cu 2＋ determination was shown to be at PMAQ concentration of 1.0×10 -5 mol•L -1 . In order to enhance the quenching effect, the Cu(II)-PMAQ complex solution was kept at 22 ℃ for 20 min. Though the interferences by Co(II) and Fe(III) were very serious, they were however, completely eliminated by being masked with oxalate and ascorbate ions respectively. The linear dynamic range for Cu(II) determination was between 25-441 µg•L -1 with the detection limit of 18 µg•L -1 (RSD＝3.7%, n＝6). The proposed method was successfully applied to the determination of Cu(II) in real samples including human blood serum, commercial tea and wheat flour.

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Determination of iron(III) with salicylic acid by the fluorescence quenching method

Cited by 71 publications

References 5 publications

Graphene oxide-assisted synthesis of bismuth nanosheets for catalytic stripping voltammetric determination of iron in coastal waters

Graphene oxide-assisted synthesis of bismuth nanosheets for catalytic stripping voltammetric determination of iron in coastal waters

Voltammetric determination of total dissolved iron in coastal waters using a glassy carbon electrode modified with reduced graphene oxide, Methylene Blue and gold nanoparticles

Spectrofluorimetric Determination of Cu2+ Using New Fluorogenic Reagent

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