Anion-exchange resin modified with pyrocatechol violet as a functional resin for retention of Sn(IV)

Moldovan, Zenovia; Vladescu, Luminita

doi:10.1016/s0003-2670(96)00420-5

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…A previous study 8 showed the desorption of Sn(IV) from the chelating resin was quantitative when using 1M HN0 3 . To this mixture an aliquot of Sn(IV) solution with a concentration of 0.01 μg/mL was added and the obtained solution was shaken for about 3h.…”

Section: Procedures For Preconcentration Ofsn(iv)mentioning

confidence: 96%

“…8 On the basis of these results previously reported a determination of the preconcentration factor of Sn(IV) using the PV-resin was performed. It was demonstrated that the fixation of this metal ion on the Dowex 2x4 anion exchanger loaded with PV takes place by the same mechanism as the formation of the PV:Sn(IV) complex in solution.…”

Section: Determination Of the Preconcentration Factormentioning

confidence: 97%

“…Different solid sorbents (namely polymers, anion exchangers, reversed-phase octadecylsilica, controlled pore glass) have extensively been used for the immobilization of organic ligands. 8 In a continuation of this study we have examined the same anion-exchange resin (Dowex 2x4). Chelating resins were prepared by the immobilization of chelating agents on various supports.…”

Section: Introductionmentioning

confidence: 99%

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SPECTROPHOTOMETRY DETERMINATION OF TRACE AMOUNTS OF Sn(IV) AFTER PRECONCENTRATION ON A CHELATE FORMING RESIN

Moldovan¹,

Vladescu²

1998

Main Group Metal Chemistry

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A method for the preconcentration of trace amounts of Sn(IV), using a chelate forming resin, is proposed. The sulphonated derivative of an aromatic complexing agent-Pyrocatechol Violet (PV)-is adsorbed by a strong-base anion-exchange resin (Dowex 2x4) by simple ion-exchange. The resin containing the dye behaves like a chelating resin, able to adsorb Sn(IV) from aqueous solutions, the optimum adsorption pH being 4. A high preconcentration factor for Sn(IV) was obtained.The PV-resin was used for the preconcentration of Sn(IV) in a zinc sample. After desorption with a small volume of IM HNO3, the pH of the analyte was adjusted at pH 4 and then Sn(IV) was determined spectrophotometrically as Sn(IV):PV complex, at 555 nm. Preparation of the PV-resinAn aqueous solution of 10" 3 M PV was prepared and used to modify the Dowex 2x4 resin (CI") as described previously. 9 Thus, the anion-exchange resin Dowex 2x4(Cl") (200 mg) was stirred with 25 mL 553 Brought to you by | Purdue University Libraries