Synthesis and analytical characterization of a chelating resin loaded with dithizone

Chwastowska, J.; Kosiarska, E.

doi:10.1016/0039-9140(88)80104-8

Cited by 59 publications

(15 citation statements)

References 6 publications

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“…Compared to the spectrum of the starting polymer (I), the intensity of the absorption at 1720cm -1 resulting from the aldehyde-group is drastically reduced and the corresponding Fermi resonance at 2720cm -~L disappeared completely, indicating that the aldehyde group was only partially reacted. The appearance of absorption bands at 1050, 1250 and 1370 cm -1 can be attributed to vibrations of the NH-CS-skeleton of the functional thiohydrazide group [21][22][23][24][25], whereas the band at 1650cm -1, assigned to the C=N-stretch vibration, may be explained in terms of a tautomeric thiohydrazide/ hydrazone system (Fig. 2).…”

Section: Characterization Of the Resinsmentioning

confidence: 99%

Polyacrolein-isonicotinic acid hydrazone and polyacrylic acid-thiohydrazide resins-synthesis and sorption properties for precious and base metals

Zhang

Grote

1998

Mikrochim Acta

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Abstract. This investigation carries on previous studies on polyacrolein-styrene resins. Further attempts were made to convert the reactive aldehyde groups of the polymeric support to functional acrolein-isonicotinic acid hydrazone (P-NHZ) or acrylic acid-thiohydrazide derivatives (P-THZD). The conditions of synthesis and the basic sorption and desorption properties of the polymers synthesized are described. For gold and platinum group metals the resins show differences in loading capacities, rates of simultaneous sorption in static conditions and efficiencies in column tests. The elufion by thiourea solution was utilized to separate Au, Pd and Pt from an excess of base metals. The P-NHZ resin seems to be more advantageous than the sulfur containing P-THZD resin.Key words: Polyacrolein-isonicotinic acid hydrazone resin, polyacrylic acid-thiohydrazide resin, polyacrolein-styrene resin, precious metals.In analytical chemistry and in hydrometallurgical processes the effective removal of traces of platinum group metals and gold from aqueous solutions by means of adsorbing agents requires stability and high selectivity of these materials in strongly acidic media [1][2][3]. The attachment of metal complex forming ligands to an insoluble resin matrix is a common preparative route to obtain selectively chelating resins [4]. The sorption properties of this type of ionexchange resin is determined by the metal complex * To whom correspondence should be addressed forming properties of the functional groups and also by the morphology of the polymeric matrix [2,5].Corresponding to Pearson's HSAB-concept promising selective sorption properties towards noble metal ions were expected from polymer bonded functional groups which contain donor N-and S-atoms, such as isothiouronium-[6-8], dithiocarbamate-[9], formazan-and tetrazolium groups [10][11][12][13].The common macroporous resin matrix is based on copolymers of polystyrene, however, in addition polyacrylonitriles, polymethacrylates and cellulose have also been chemically modified. In our previous studies the macroporous crosslinked polyacroleinstyrene resin matrix could be successfully functionalized [14][15][16][17], due to the reactivity of the acrylic aldehyde group. It reacts easily with amino groups so that a serial of chelating resins have been obtained. For example, functional aldehyde-hydrazone (P-HZ) and phenylhydrazone resins (P-PHZ) [17] were synthesized. The present contribution describes the synthesis and sorption properties of polyacroleinisonicotinic acid hydrazone and polyacrylic acidthiohydrazide resins.

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Section: Characterization Of the Resinsmentioning

confidence: 99%

Polyacrolein-isonicotinic acid hydrazone and polyacrylic acid-thiohydrazide resins-synthesis and sorption properties for precious and base metals

Zhang

Grote

1998

Mikrochim Acta

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“…The extraction of U 6ϩ on DBP resin was also comparable with other methods (46). Diphenylthiocarbazone (dithiazone) immobilized on a matrix of styrene-divinylbenzene copolymer has been used for sorption of Ag ϩ , Cu 2ϩ , Cd 2ϩ , Pb 2ϩ , Ni 2ϩ , Co 2ϩ , and Zn 2ϩ (47). The metal ions were eluted with HCl and determined by AAS.…”

Section: A Chelating Resins Based On Amberlite Xad-2 (Polystyrene Tymentioning

confidence: 99%

Chelating Resins and Their Applications in the Analysis of Trace Metal Ions

Garg

Sharma

Bhojak

et al. 1999

Microchemical Journal

127

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“…Liquid-liquid extraction and spectrophotometric determination of metals using dithizone are sensitive, but have low selectivity and both reagent and complexes are unstable. [16][17][18][19] In the present paper we describe a pre-concentration method that allows in a single operation five metallic cations to be separated from brine samples. The separation and pre-concentration are performed using dithizone supported on naphthalene.…”

Section: Introductionmentioning

confidence: 99%

Separation and Pre-concentration of Cadmium, Copper, Lead, Nickel and Zinc by Solid-Liquid Extraction of their Cocrystallized Naphthalene Dithizone Chelate in Saline Matrices

Costa¹,

Lopes²,

Korn³

et al. 2002

J. Braz. Chem. Soc.

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Um procedimento em batelada é proposto para separação e pré-concentração de cádmio, chumbo, níquel e zinco em amostras de salmoura. O método baseia-se na adsorção dos íons metálicos sobre a fase sólida composta de ditizona co-cristalizada com naftaleno microcristalino, na faixa de pH de 8,5 -9,1. Ácido nítrico é utilizado para re-extrair os cátions da fase sólida, os quais são determinados por ICP-OES. Vários parâmetros, tais como efeito do pH, do tempo de agitação e da quantidade da fase sólida foram estudados sistematicamente visando otimizar as condições para a determinação de quantidades traço de Cd, Cu, Pb, Ni e Zn em amostras sintéticas de salmoura. Os limites de detecção obtidos, expressos em µg L -1 , foram: 44 (Zn), 11 (Ni), 30 (Cd), 47 (Pb) e 11 (Cu). A precisão do procedimento foi estabelecida pela medida de 10 replicatas com 250 µg L -1 de cada íon e os desvios padrão relativos foram de 2,71 % (Cd), 2,15 % (Cu), 1,53 % (Pb), 2,47 % (Ni) e 2,78 % (Zn). A exatidão do procedimento foi confirmada pelo método de adição de analitos e os resultados obtidos indicaram recuperação quantitativa (≥ 95 %).A procedure for separation and pre-concentration of trace amounts of cadmium, copper, lead, nickel, and zinc in brine samples has been proposed. It is based on the adsorption of metal ions onto dithizone co-crystallized with microcrystalline naphthalene, in the pH range 8.5-9.1. Nitric acid is used to back-extract the cations from the solid phase, which are measured by ICP-OES. Various parameters, such as the effect of pH, stirring time, and amounts of solid phase, have been studied in detail, to optimize the conditions for the determination of trace amounts of Cd, Cu, Pb, Ni and Zn in synthetic brine samples. The limits of detection values expressed in µg L -1 are 44 (Zn), 11 (Ni), 30 (Cd), 47 (Pb) and 11 (Cu). The precision of the procedure was determined by running 10 replicate samples, each one containing 250 µg L -1 of each element and the relative standard deviations were 2.71 % (Cd), 2.15 % (Cu), 1.53 % (Pb), 2.47 % (Ni), and 2.78 % (Zn). The accuracy of the procedure was confirmed by applying the analyte additions method and the results indicated that quantitative recoveries (≥ 95 %) were obtained.

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Synthesis and analytical characterization of a chelating resin loaded with dithizone

Cited by 59 publications

References 6 publications

Polyacrolein-isonicotinic acid hydrazone and polyacrylic acid-thiohydrazide resins-synthesis and sorption properties for precious and base metals

Polyacrolein-isonicotinic acid hydrazone and polyacrylic acid-thiohydrazide resins-synthesis and sorption properties for precious and base metals

Chelating Resins and Their Applications in the Analysis of Trace Metal Ions

Separation and Pre-concentration of Cadmium, Copper, Lead, Nickel and Zinc by Solid-Liquid Extraction of their Cocrystallized Naphthalene Dithizone Chelate in Saline Matrices

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