Preconcentration of trace metals from seawater with 7-dodecenyl-8-quinolinol-impregnated macroporous resin

Isshiki, Kenji; Tsuji, Fumito.; Kuwamoto, Tooru; Nakayama, Eiichiro

doi:10.1021/ac00147a011

Cited by 91 publications

(28 citation statements)

References 24 publications

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“…or masking reagents. 26 The separation method of copper(II) from the other metals will be developed in forthcoming reports. …”

Section: Resultsmentioning

confidence: 99%

Polymer Effect of 4-Vinylpyridine-N-vinylpyrrolidone Copolymer on Luminol Chemiluminescence and Its Application to Determinations of Trace Copper(II)

Karatani

1988

ANAL. SCI.

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The polymer effect of the copolymer of 4-vinylpyridine and N-vinylpyrrolidone(prepared by radical polymerization) on the Chemiluminescence of a 5-amino-2,3-dihydro-l,4-phthalazine dione/hydrogen peroxide/copper(ll) system in an alkaline solution was studied. This was done to apply the polymer effect to the chemiluminescence determination of trace copper(I l). The luminol chemiluminescence catalyzed by copper(ll) was strongly enhanced in the presence of the copolymer. This seemed to be attributed to the increase in the catalytic activity of copper(ll) due to the polymer effect. Furthermore, the effect of the copolymer on the luminol chemiluminescence has been applied to the determination of copper(II) at the ppb concentration level by the use of the flow method. KeywordsPolymer effect, 4-vinylpyridine-N-vinylpyrrolidone copolymer, luminol chemiluminescence, trace copper (II) The chemiluminescence(CL) of 5-amino-2,3-dihydro-1,4-phthalazine dione (luminol) is important as a determining reaction for various trace metals.' In the luminol reaction, metal ions act chiefly as catalysts.2 If their catalytic activity can be increased by modifying the reaction conditions of the CL determination, a far more sensitive detection of trace metals will become feasible.In recent years, studies aimed at increasing the efficiencies of various CL reaction systems have been undertaken from the analytical viewpoint by Yamada et a1.3_8 and Hinze et a1.9"0 These studies fall into two main groups. One is the application of the micellar effect of surfactants, such as SB-12, NaLS, CTAC and Tween 853-6,9-", and the other is the sensitized CL obtained in the presence of fluorescence reagents, such as uranine and Eosin Y.?-9 On the other hand, the author reported that the microenvironment of the water-soluble polymers (WSPs), such as albumin and polyethyleneimine, with the ability to bind organic molecules, played a substantial role in the enhancement of the CL of luminol in the absence of a metal catalyst.12 The WSP, having basic groups in the binding site, particularly enhanced CL. The microenvironmental effect is one of the polymer effects.13 Thus, the polymer effect seems to be an important factor in the enhancement of the CL efficiency.In general, the polymer effect significantly influences the reaction catalyzed by metals.13 A typical example is the reaction of the metal-activated enzyme. In this case, the catalytic activity of the metal in the active site is enhanced by the polymer effect of the enzyme molecule." The synthesized polymer-metal complex, often treated as a model of the metal-activated enzyme, shows more efficient catalytic activity than that of the hydrated metal ion.' 5The polymer effect is also expected to influence significantly the luminol reaction catalyzed by metals. In this study, the effect of the 4-vinylpyridine-Nvinylpyrrolidone copolymer(4VP-NVP copolymer) has been examined as a model polymer which is capable of complexing metal ions on the luminol reaction, and the copper(II) ion was taken up as a model met...

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“…or masking reagents. 26 The separation method of copper(II) from the other metals will be developed in forthcoming reports. …”

Section: Resultsmentioning

confidence: 99%

Polymer Effect of 4-Vinylpyridine-N-vinylpyrrolidone Copolymer on Luminol Chemiluminescence and Its Application to Determinations of Trace Copper(II)

Karatani

1988

ANAL. SCI.

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“…23 In this method both elements are concentrated with a Kelex-100 column, into which Amberlite XAD-4 resin (polystyrene-divynyl benzene copolymer) loaded with Kelex-100 (7-dodecenyl-8-quinolinol) is packed. 24 The eluent is dissolved with a supporting electrolyte containing potassium chlorate, benzilic acid and 2-methyl-8-quinolinol. Both elements are determined from the peak current in a sampling DC polarographic mode.…”

Section: Molybdenum and Tungstenmentioning

confidence: 99%

Chemical Analyses of Seawater for Trace Elements Recent Progress in Japan on Clean Sampling and Chemical Speciation of Trace Elements A Review

et al. 1989

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“…In a previous study, we demonstrated that gallium(III) could be quantitatively extracted with HQs from a weakly acidic solution. [23][24][25][26] Moreover, the quantitative extraction of gallium(III) with Amberlite XAD-4 and XAD-7 resins containing 7-dodecenyl-8-quinolinol was reported by Isshiki et al 20 Cote and co-workers investigated the SPE of gallium(III) with HEMOQ-impregnated Amberlite XAD-2 resin from a 5.0 mol l -1 aqueous NaOH solution. 21 In this study, we investigated the SPE of gallium(III) from acidic and alkaline solutions with hydrophobic HQ-impregnated resins, and found the effect of alkyl-and halogen-substitution in HQ on the extractability of gallium(III) into the resin phase.…”

mentioning

confidence: 95%

“…In order to prevent the extractant from leaching from the extractant-impregnated resin, hydrophobic extractants that interact with the resin strongly are often used. Interesting studies of the SPE of gallium(III) using various hydrophobic extractants, such as 1-(2-pyridylazo)naphthol, 17 4-(2-thiazolylazo) resorcinol, 18 5-phenylazo-8-quinolinol, 19 7-dodecenyl-8-quinolinol 20 and 7-(4-ethyl-1-methyloctyl)-8-quinolinol (HEMOQ) 21 were reported. 8-Quinolinol derivatives (HQs) have been widely used as extractants, 22 because they can form stable complexes with various metal ions.…”

mentioning

confidence: 99%

Solid-Phase Extraction of Gallium(III) with Hydrophobic 8-Quinolinol Derivatives-impregnated Resin from Aqueous Acidic and Alkaline Solutions

et al. 2008

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Gallium is one of the most important elements in the electronic industry. Its compounds, such as GaAs and GaN, are used in various high-technology devices, such as laser diodes, analog integrated circuits, semiconductors, and other electronic devices. 1 However, gallium is not found in concentrated deposits, and is usually commercially recovered from bauxites and sphalerite as a byproduct of the manufacture of aluminum and zinc, respectively. Therefore, the recovery of gallium from various industrial materials is a very interesting subject.Solvent extraction is commonly used to separate and concentrate gallium(III) from aqueous acidic and alkaline solutions. [2][3][4][5][6][7][8][9][10] However, solvent extraction has some disadvantages, such as the need to use toxic and flammable organic solvents, pollution of the aqueous solution by the remaining organic solvent, and the production of toxic liquid wastes. Solid-phase extraction (SPE) is a more environmentally acceptable method than solvent extraction. Moreover, many of the problems associated with solvent extraction can be prevented with SPE, such as incomplete phase separations (micellization and emulsion), the precipitation of an analyte at the liquid-liquid interface and the wall of the extraction-cell, and disposal of large quantities of organic solvents.Several excellent reviews on the SPE of metal ions have been reported. 11,12 The uses of synthetic resins combined with a chelating ligand as a functional group, called a chelating resin, are very useful for the SPE of metal ions. [13][14][15][16] However, the synthesis of chelating resins having various ligands is not easy, and somewhat time-consuming.The impregnation of a chelating reagent as an extractant onto the resins can be used as an alternative to the chelating resins due to a relatively simple preparation. In order to prevent the extractant from leaching from the extractant-impregnated resin, hydrophobic extractants that interact with the resin strongly are often used. Interesting studies of the SPE of gallium(III) using various hydrophobic extractants, such as 1-(2-pyridylazo)naphthol, 17 4-(2-thiazolylazo) resorcinol, 21 were reported. 8-Quinolinol derivatives (HQs) have been widely used as extractants, 22 because they can form stable complexes with various metal ions. In a previous study, we demonstrated that gallium(III) could be quantitatively extracted with HQs from a weakly acidic solution. [23][24][25][26] Moreover, the quantitative extraction of gallium(III) with Amberlite XAD-4 and XAD-7 resins containing 7-dodecenyl-8-quinolinol was reported by Isshiki et al. 20 Cote and co-workers investigated the SPE of gallium(III) with HEMOQ-impregnated Amberlite XAD-2 resin from a 5.0 mol l -1 aqueous NaOH solution. 21 In this study, we investigated the SPE of gallium(III) from acidic and alkaline solutions with hydrophobic HQ-impregnated resins, and found the effect of alkyl-and halogen-substitution in HQ on the extractability of gallium(III) into the resin phase. Moreover, the availability of HQ...

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Preconcentration of trace metals from seawater with 7-dodecenyl-8-quinolinol-impregnated macroporous resin

Cited by 91 publications

References 24 publications

Polymer Effect of 4-Vinylpyridine-N-vinylpyrrolidone Copolymer on Luminol Chemiluminescence and Its Application to Determinations of Trace Copper(II)

Polymer Effect of 4-Vinylpyridine-N-vinylpyrrolidone Copolymer on Luminol Chemiluminescence and Its Application to Determinations of Trace Copper(II)

Chemical Analyses of Seawater for Trace Elements Recent Progress in Japan on Clean Sampling and Chemical Speciation of Trace Elements A Review

Solid-Phase Extraction of Gallium(III) with Hydrophobic 8-Quinolinol Derivatives-impregnated Resin from Aqueous Acidic and Alkaline Solutions

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