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Лосев, В. Н.; Alennikova, Yu. V.; Elsuf’ev, E. V.; Трофимчук, А. К.

doi:10.1023/a:1016226017237

Cited by 6 publications

(8 citation statements)

References 3 publications

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“…4) regardless of the nature of the acid in the initial silver(I) solution. A similar effect of halide ions was observed in the low-temperature sorption-luminescence determination of gold [8].…”

Section: Resultssupporting

confidence: 71%

“…A number of reagents were proposed for the luminescent determination of silver in solutions [1][2][3].One version of this technique is the sorption-luminescence method [4], which involves the preconcentration of elements and their complexes from aqueous solutions on different adsorbents followed by their luminescence determination directly in the adsorbent phase.This approach was implemented in the development of sorption-luminescence procedures using 1,10-phenanthroline and silicas (including those chemically modified with sulfo groups [5]) for determining ruthenium and osmium, polyurethane foams for thallium [6], silica gel chemically modified with mercaptopropyl groups for copper [7] and gold [8], and silica gels chemically modified with thiourea derivatives for platinum [9].In this work, silica gel chemically modified with mercaptopropyl groups was proposed for the isolation, preconcentration, and luminescence determination of silver.EXPERIMENTAL Stock solutions of silver (1 mg/mL) in HNO 3 and HCl were prepared by dissolving exact portions of chemically pure silver nitrate in 2 M HNO 3 and concentrated HCl, respectively, followed their dilution with water to an acidity of 6 M HCl. Working solutions with lower concentrations were prepared by diluting the stock solutions with corresponding acids.…”

mentioning

confidence: 99%

“…This approach was implemented in the development of sorption-luminescence procedures using 1,10-phenanthroline and silicas (including those chemically modified with sulfo groups [5]) for determining ruthenium and osmium, polyurethane foams for thallium [6], silica gel chemically modified with mercaptopropyl groups for copper [7] and gold [8], and silica gels chemically modified with thiourea derivatives for platinum [9].…”

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confidence: 99%

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Low-temperature sorption-luminescence determination of silver using silica gel chemically modified with mercaptopropyl groups

2005

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The determination of elements by their luminescence is characterized by high sensitivity, selectivity, and simplicity. A number of reagents were proposed for the luminescent determination of silver in solutions [1][2][3].One version of this technique is the sorption-luminescence method [4], which involves the preconcentration of elements and their complexes from aqueous solutions on different adsorbents followed by their luminescence determination directly in the adsorbent phase.This approach was implemented in the development of sorption-luminescence procedures using 1,10-phenanthroline and silicas (including those chemically modified with sulfo groups [5]) for determining ruthenium and osmium, polyurethane foams for thallium [6], silica gel chemically modified with mercaptopropyl groups for copper [7] and gold [8], and silica gels chemically modified with thiourea derivatives for platinum [9].In this work, silica gel chemically modified with mercaptopropyl groups was proposed for the isolation, preconcentration, and luminescence determination of silver.EXPERIMENTAL Stock solutions of silver (1 mg/mL) in HNO 3 and HCl were prepared by dissolving exact portions of chemically pure silver nitrate in 2 M HNO 3 and concentrated HCl, respectively, followed their dilution with water to an acidity of 6 M HCl. Working solutions with lower concentrations were prepared by diluting the stock solutions with corresponding acids. Solutions of alkali, alkali-earth, and nonferrous metals were prepared by diluting exact portions of their chlorides in distilled water and acidifying the solutions to pH 1.Silica gel chemically modified with mercaptopropyl groups was used as an adsorbent. The adsorbent was based on silica gel 60 (Merck), fraction 0.06-0.16 mm, with a specific surface area of 370 m 2 /g (determined by nitrogen sorption) and an average pore diameter of 15 nm. The concentration of attached mercaptopropyl groups was determined by the back thiolometric titration of excess silver nitrate added to an exact portion of the adsorbent; it was 1.32 ± 0.03 mmol per one gram of adsorbent.To study the sorption of silver under batch conditions, a silver(I) solution in a corresponding acid was placed in a graduated tube with a ground stopper; HCl (HNO 3 ) or NaOH was added to adjust the required pH of the solution, and water was added to a volume of 10 mL. An adsorbent (0.1 g) was introduced, and the mixture was thoroughly stirred for 1-15 min. The adsorbent was separated from the solution by decantation, transferred to a steel cell, and cooled to liquidnitrogen temperature (77 K); the luminescence intensity was measured on a homemade spectrofluorimeter with an MDR-4 monochromator. An SVD-120A mercury-quartz lamp with a UFS-2 light filter was used as an excitation source.Under dynamic conditions, silver was preconcentrated in a quartz microcolumn (2 mm in inner diameter and 4 cm in height) containing 0.02 g of the adsorbent. The solution was pumped through the microcolumn using a peristaltic pump. The distribution of silver was contr...

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Section: Resultssupporting

confidence: 71%

mentioning

confidence: 99%

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confidence: 99%

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Low-temperature sorption-luminescence determination of silver using silica gel chemically modified with mercaptopropyl groups

2005

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“…23 Organosilicon adsorbent 1 containing thiol groups was also used for low-temperature sorption of gold for subsequent luminescence determination. 24 The adsorbent was prepared by immobilization of mercaptopropyl(triethoxy)silane on silica gel for column chromatography (Merck, fraction of 0.06 ± 0.16 mm, specific surface area *500 m 2 g 71 , average pore diameter 6 nm). The concentration of SH groups grafted on the surface was determined by thiolometric and iodometric back titration to be 0.87 AE 0.03 mmol g 71 .…”

Section: Adsorbents Based On Covalently Modified Silicasmentioning

confidence: 99%

Organosilicon ion-exchange and complexing adsorbents

Власова¹,

Оборина²,

Grigoryeva³

et al. 2013

Russ. Chem. Rev.

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Data on the ion-exchange and complexing orga-Data on the ion-exchange and complexing organosilicon adsorbents published during the last 10 ± 12 years, nosilicon adsorbents published during the last 10 ± 12 years, including the results of systematic research of the authors, including the results of systematic research of the authors, are summarized and analyzed. The following types of are summarized and analyzed. The following types of substances are considered: silicas with covalently grafted substances are considered: silicas with covalently grafted modifiers, silicas and aluminosilicates with non-covalently modifiers, silicas and aluminosilicates with non-covalently grafted modifiers and carbofunctional polyorganylsilses-grafted modifiers and carbofunctional polyorganylsilsesquioxanes prepared by polycondensation of appropriate quioxanes prepared by polycondensation of appropriate organosilicon monomers. Adsorbents of these types find organosilicon monomers. Adsorbents of these types find extensive practical use, in particular, as analytical reagents extensive practical use, in particular, as analytical reagents for determination of metals in natural and artificial speci-for determination of metals in natural and artificial specimens, agents for isolation of valuable elements from indus-mens, agents for isolation of valuable elements from industrial wastes and agents for removal of especially hazardous trial wastes and agents for removal of especially hazardous components from wastes and effluents. The bibliography components from wastes and effluents. The bibliography includes 109 references includes 109 references. .

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“…The use of chelating polymer sorbents (PCSs) allows one to perform individual or group preconcentration of microelements from large volumes of solutions of complex composition, to decrease the detection limit, and to eliminate or significantly reduce the influence of macrocomponents, which improves the reliability and accuracy of analysis [3][4][5][6].…”

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Preconcentration of Cadmium and Zinc on a Chelating Sorbent and Their Determination by Flame Atomic Absorption Spectrometry

et al. 2005

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It is well known that cadmium and zinc at high concentrations adversely affect the environment. Cadmium and its compounds exhibit carcinogenic properties and damage bones [1,2]. Therefore, the determination of heavy-metal ions at a trace level in different environmental and industrial samples is an intricate and important analytical problem. The main procedures of the spectrometric determination of heavy-metal ions do not always meet modern requirements for the detection limit and require their separation from concomitant elements. To increase the determination sensitivity, combined methods that involve preconcentration appear promising.The use of chelating polymer sorbents (PCSs) allows one to perform individual or group preconcentration of microelements from large volumes of solutions of complex composition, to decrease the detection limit, and to eliminate or significantly reduce the influence of macrocomponents, which improves the reliability and accuracy of analysis [3-6].As a rule, chemically modified, complexing sorbents based on cellulose, polystyrene, silica, porous glass, polyurethane foam, and acrylic fiber; ionexchangers chemically modified with complexing reagents highly selective for the recovered elements; aluminum oxide; and, less commonly, commercial anion and cation exchangers are used for element preconcentration [10][11][12][13][14]. However, we have found no data on the analytical application of polybutadienebased sorbents. Therefore, an investigation of the adsorption properties of novel polybutadiene-based sorbents and their analytical application are topical problems.In the present paper, conditions are investigated for cadmium and zinc preconcentration on a new chelating polybutadiene-based sorbent followed by the determination of these elements by flame atomic absorption spectrometry (FAAS). The effects of the sample solution pH, the flow rate of the sample and eluent solutions, the eluent composition, the sample volume, and other parameters have been studied. The developed method has been employed for the determination of trace cadmium and zinc in water obtained after oil pumping and in seawater. EXPERIMENTAL Reagents and solutions.Reagents of analytical or chemically pure grade and distilled water were used. Stock solutions of metal ions (1 mg/mL) were prepared by dissolving accurately weighed portions of their salts in water followed by dilution to 1 L volume. Working solutions were made by properly diluting stock solutions with distilled water. Ammonium acetate buffer solutions (pH 3-10) were prepared by mixing corresponding volumes of 0.1 M CH 3 COOH and 0.1 M NH 3 solutions; a commercial volumetric concentrate of HCl (Fixanal) was also used (pH 1-2).In our study, a new chelating polymer sorbent modified with fragments of 2-amino-4-nitro-phenol-6-sulphonic acid was used. To obtain this sorbent, polybutadiene was phosphochlorinated and fragments of 2-amino-4-nitro-phenol-6-sulphonic acid were inserted in the macromolecule using the procedure described in [7]. The obtained sorbent was...

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Untitled

Cited by 6 publications

References 3 publications

Low-temperature sorption-luminescence determination of silver using silica gel chemically modified with mercaptopropyl groups

Low-temperature sorption-luminescence determination of silver using silica gel chemically modified with mercaptopropyl groups

Organosilicon ion-exchange and complexing adsorbents

Preconcentration of Cadmium and Zinc on a Chelating Sorbent and Their Determination by Flame Atomic Absorption Spectrometry

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