Voltammetric and spectrophotometric study of the zirconium-Alizarine Red S complex

Zittel, H.E.; Florence, T.M.

doi:10.1021/ac60247a031

Cited by 59 publications

(34 citation statements)

References 20 publications

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“…Because phosphomolybdic acid and phosphotungstic acid, which have been used in connection with aliza rin, are oxidants, and because ARS has been shown by chemical tests to have well-formed oxidation waves [ Furman andStone, 1948: Zittel andFlorence, 1967], the present study was undertaken to test the effect of commonly used oxidants on the staining property of ARS in vitro.…”

Section: Introductionmentioning

confidence: 99%

Effect of oxidizing agents on alizarin red S and its staining properties <i>in vitro</i>

Virtanen¹,

Isotupa²

1980

Cells Tissues Organs

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Different oxidants regulate the staining ability, the hue, and the staining target in bone, cartilage and connective tissue in vitro in connection with alizarin red S (ARS). The use of oxidants should promote the staining ability on guinea pig bone, also slightly on rabbit bone, but not on rat bone. Quite selective staining of bone, cartilage and connective tissue was achieved in this study via ARS oxidation. In addition to oxidizing, complex formation, especially when regulating the staining target, may be considerable. In these twelve experiments with oxidizing agents, the most promising results as concerns selectivity were obtained with phosphomolybdic acid, ferric chloride, stannic chloride and chromium trioxide. As agents activating the staining ability, potassium persulfate seems best. Based on the oxidizing influence of potassium persulfate and according to the potentiometric and precipitation analyses, the coordinative bonding of Ca²⁺ to the ARS molecule seems obvious. When the β-phenolic group of ARS is partly oxidized and, on the other hand, partly ionized, indicating the titration range, Ca²⁺ should be bound to it. Oxidized α-quinonic oxygen begins to form a coordinative bond with the same Ca²⁺ and thus the chelate is formed. On the slightly alkaline side, where the α-phenolic group has its ionization ranges, the oxidant causes a clear broadening and increase in the complex formation effect, which seems to be an indication of reactions of the calcium ions with two oxidized and partly ionized ARS molecules.

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Section: Introductionmentioning

confidence: 99%

Effect of oxidizing agents on alizarin red S and its staining properties <i>in vitro</i>

Virtanen¹,

Isotupa²

1980

Cells Tissues Organs

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“…As ondas I/I' são atribuí-das a um processo redox envolvendo dois elétrons e dois prótons o qual é devido ao grupo para-quinona da molécula do VAS. Desta maneira, o processo redox responsável pela resposta reversível do ligante VAS pode ser representado por 18,26 :…”

Section: Comportamento Voltamétrico Do Ligante Vas Adsorvido Na Superunclassified

“…7, na qual uma molécula do ligante VAS se liga a um íons de Cu(II), formando um complexo, com razão molar 1:1 18 . Esta estrutura é baseada na comparação entre as Figura 3B e 6, nas quais as ondas I/I' do ligante não são afetadas pela complexação com o cobre mantendo o grupo para-quinona livre.…”

Section: Complexação De íOns Cu(ii) Na Superfície Do Eletrodo De Gp unclassified

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Estudo voltamétrico do complexo de cobre(II) com o ligante vermelho de alizarina S, adsorvido na superfície do eletrodo de grafite pirolítico

Filho¹,

Chierice²,

Marques³

1999

Quím. Nova

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VOLTAMMETRIC STUDY OF COMPLEX OF COPPER(II) WITH ALIZARIN RED S LIGAND, ADSORBED ON SURFACE OF PYROLYTIC GRAPHITE ELECTRODE. The alizarin red S (ARS)has been used as a spectrophotometric reagent of several metals for a long time. Now this alizarin has been used as modifier agent of electrodes, for voltammetric analyses. In this work cyclic voltammetry experiments was accomplished on closed circuit, with the objective of studying the voltammetric behavior of alizarin red S adsorbed and of its copper complex, on the surface of the pyrolytic graphite electrode. These studies showed that ARS strongly adsorbs on the surface of this electrode. This adsorption was used to immobilize ions copper(II) from the solution.

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“…[8][9][10][11][12][13][14] Consequent to the need of large scale separation with the determination of each element alone, relatively new techniques should be developed.…”

Section: Introductionmentioning

confidence: 99%

Selective Separation–Flotation of Hafnium from Zirconium and Their Determination in Real Samples

et al. 2000

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A simple procedure is presented for selective separation of hafnium from zirconium in both simulated and real samples. The procedure depends on using Alizarin Red sulfonate (ARS) for complexation of both Hf(IV) and Zr(IV), in which a flotation step is applied for floating their complexes using oleic acid (HOL) surfactant. Several factors affecting the flotation process have been studied. It is found that hydrogen ion concentration is of paramount importance. Maximum separation of Zr(IV) (100%) is achieved at pH range 1.5 -2, whereas at pH range 5.5 -7 Hf(IV) is completely separated. Interference of various foreign ions is avoided by adding excess ARS. Infra-red data were used for suggesting the flotation mechanism.

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Voltammetric and spectrophotometric study of the zirconium-Alizarine Red S complex

Cited by 59 publications

References 20 publications

Effect of oxidizing agents on alizarin red S and its staining properties <i>in vitro</i>

Effect of oxidizing agents on alizarin red S and its staining properties <i>in vitro</i>

Estudo voltamétrico do complexo de cobre(II) com o ligante vermelho de alizarina S, adsorvido na superfície do eletrodo de grafite pirolítico

Selective Separation–Flotation of Hafnium from Zirconium and Their Determination in Real Samples

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