Detata-Filters for Metal Preconcentration and Multielement Determination in Natural Waters

Varshal, G. M.; Velyukhanova, T. K.; Pavlutskaya, V.I.; Starshinova, N. P.; Formanovsky, A. A.; Серегина, И. Ф.; Shil'nikov, A. M.; Tsysin, G. I.; Zolotov, Yu. A.

doi:10.1080/03067319408027417

Cited by 16 publications

(8 citation statements)

References 7 publications

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“…The molecular weight of humic substances varies widely, from a few hundred to several tens of thousands of daltons (Varshal 1977). Humic acids have a greater molecular weight and a lesser ability to complex than fulvic acids (Linnik & Nabivanets 1986).…”

Section: Resultsmentioning

confidence: 99%

Zinc, lead and cadmium speciation in Dnieper water‐bodies

Linnik

2000

Lakes & Reservoirs

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Data on the concentrations and movements of Zn, Pb and Cd in Dnieper reservoirs and the Dnieper‐Bug estuary are considered. There is a clear trend of increasing concentrations, often two‐ to fourfold, of these materials from the 1960s to the end of the 1980s. Large increases may be explained as the result of increased human impact on the water‐bodies and also because of reduced water discharge in the Dnieper River (discharge has been reduced by nearly 10 km3 in recent years). At present, the average concentrations of Zn, Pb and Cd in Dnieper water‐bodies are 35.0–50.0, 15.0–18.0 and 0.5–1.8 μg L–1, respectively. Anodic stripping voltammetry, membrane filtration, ion‐exchange and gel permeation chromatography on neutral sephadexes were methods used for analysis. The influence of adsorption and complexation processes on the mobility of Zn, Pb and Cd, and the ratio of their forms were compared. Ratios of free metal ions to ions bound in complexes with natural organic ligands were studied. The binding of metals in complexes with dissolved organic matter (DOM), or their adsorption onto suspended particles, were major processes reducing the concentration of free ions in their most toxic form. The percentage of Zn, Pb, and Cd free ions in the total balance of dissolved forms was no more than 3.6–4.8, 0.2–0.6 and 7.2–9.5%, respectively. The molecular‐weight distribution of organic metal complexes and their chemical nature, as well as the potential for complexing of DOM were investigated. Most Zn, Pb and Cd was found as complex compounds with DOM of different chemical natures and molecular weights. Humic substances, particularly fulvic acids, played a major role in the migration of the metals. These ligands bind from 40 to 80% of metals in the composition of organic complexes. Metal complex compounds of relatively low molecular weight (< 5000 Da) predominated in organic complexes of Zn (38–50%), Pb (38–52%) and Cd (22–47%). The role of inorganic ligands in complexation in surface waters was less important.

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Section: Resultsmentioning

confidence: 99%

Zinc, lead and cadmium speciation in Dnieper water‐bodies

Linnik

2000

Lakes & Reservoirs

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“…For the investigation, the preconcentration of manganese on diethylenetriaminetetraacetate (DETATA) paper-based chelating sorbent was chosen as it combines effectiveness of metal sorption and simplicity of operation. 2,4 As an indicator reaction, the oxidation of 3,3A,5,5A-tetramethylbenzidine (TMB) by potassium periodate (KIO 4 ) catalyzed by Mn II was selected.…”

Section: Sorption-catalytic Determination Of Manganese Directly On a ...mentioning

confidence: 99%

Sorption–Catalytic Determination of Manganese Directly on a Paper-based Chelating Sorbent

Beklemishev

Stoyan²,

Dolmanova³

1997

Analyst

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A hybrid technique based on a catalytic reaction carried out on the surface of a paper-based sorbent is proposed. It is shown that MnII exhibits its catalytic action in the oxidation of 3,3',5,5'-tetramethylbenzidine with periodate in aqueous solution as well as on filter-paper with or without attached diethylenetriaminetetraacetate (DETATA) groups. Optimum conditions differ for the reaction in solution and on filter-paper. For equal catalyst concentrations, higher initial reaction rates are attainable on the filter-papers. Preconcentration of manganese on the DETATA sorbent combined with the subsequent catalytic reaction improves the selectivity, reduces the limit of determination down to 5 x 10(-6) mg l-1 (as compared with 6 x 10(-5) mg l-1 in solution) and expands the linear range by an order of magnitude (to 5 x 10(-6)-2.5 x 10(-3) mg l-1). The precision of manganese determination on the sorbent is high (the RSDs are < or = 5% for > or = 6 x 10(-4) micrograms Mn). Samples of tap and river water were analyzed by use of the proposed sorption-catalytic technique. A rapid procedure for the determination of manganese with visual detection was also developed.

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“…The DETA polymer has recently been used for preconcentration of some metal ions (9). An advantage being that the adsorption and desorption of the complexes are both fast.…”

Section: Introductionmentioning

confidence: 99%

Determination of Cadmium, Copper, and Zinc by Flame Atomic Absorption Spectrometry After Preconcentration Using a Deta (Diethylenetriamine) Polymer

2001

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An atomic absorption spectrometric method with a preconcentration and separation procedure using a DETA (diethlyenetriamine) polymer is proposed for the determination of Cd, Cu and Zn. The influence various experimental condition on retention and elution efficiencies of the analyte were investigated by applying batch and column techniques. All investigated elements were quantitatively retained at pH 3, then were completely recovered by means of nitric acid. The loading capacity of the DETA polymer is 5.2 mg Cu 2+ /g polymer. A contact time of one minutes is sufficient for quantitative retention and elution which is shorter than for many other sorbents. In the presence of sodium chloride up to 0.5% the analyte elements were quantitatively separated and recovered. 439

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Detata-Filters for Metal Preconcentration and Multielement Determination in Natural Waters

Cited by 16 publications

References 7 publications

Zinc, lead and cadmium speciation in Dnieper water‐bodies

Zinc, lead and cadmium speciation in Dnieper water‐bodies

Sorption–Catalytic Determination of Manganese Directly on a Paper-based Chelating Sorbent

Determination of Cadmium, Copper, and Zinc by Flame Atomic Absorption Spectrometry After Preconcentration Using a Deta (Diethylenetriamine) Polymer

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