Photometric determination of aqueous cobalt (II), nickel (II), copper (II) and iron (III) with 1-nitroso-2-naphthol-3,6-disulfonic acid disodium salt in gelatin films

Reshetnyak, E. A.; Ivchenko, N. V.; Никитина, Н. А.

doi:10.2478/s11532-012-0081-7

Cited by 14 publications

(12 citation statements)

References 29 publications

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“…In addition, 2 ,3,4 ,5,7-pentahydroxyflavone, 2,2 6,2 -terpyridine, and 2,4,6-tripyridyl-1,3,5-triazine are also used in determination of Fe 2+ ions. Some of the ligands useful in spectrophotometric determination of Fe 3+ ions are 1-nitroso-2-naphtol-3,6-disulfonic acid disodium salt, ammonium thiocyanate, tiron, and 3,3 5,5 -tetramethylbenzidine (2,(18)(19)(20)(21)(22)(23).…”

Section: Introductionmentioning

confidence: 99%

Separation and Speciation of Iron Ions by Using Colorimetric Hydrogels

Özay

2014

Journal of Macromolecular Science, Part A

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In this study, Fe 3+ ion selective N-(Rhodamine-6G)lactam-N'-acryloyl-ethylenediamine (RH6GAC) monomer was synthesized. Then, p(Acrylamide-co-N-(Rhodamine-6G)lactam-N'-acryloyl-ethylenediamine) (p(AAm-co-RH6GAC)) and p(2-hydroxyethylmethacrylate-co-N-(Rhodamine-6G)lactam-N'-acryloyl-ethylenediamine) (p(HEMA-co-RH6GAC)) colorimetric hydrogels were synthesized by using acrylamide (AAm) and 2-hydroxyethylmethacrylate (HEMA) as primary monomers. FT-IR, SEM, polymerization yield and swelling characterizations were conducted for the resulting hydrogels. Then, these hydrogels were used in selective absorption of Fe 3+ ions from aqueous media. The hydrogels, which could absorb Fe 3+ ions selectively from a mixture of metal ions, were used as column packing material. The solutions containing Fe 2+ and Fe 3+ ions at different concentrations were separated at a rate of 97.7 ± 0.7%.

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Section: Introductionmentioning

confidence: 99%

Separation and Speciation of Iron Ions by Using Colorimetric Hydrogels

Özay

2014

Journal of Macromolecular Science, Part A

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“…For the determination of trace concentrations of cobalt photometric method was combined with preliminary solid-phase extraction [34]. Gelatin films, chitosan, cellulose, Amberlite XAD resins, C 18 membrane disk and silica gel were used as the sorbents for cobalt preconcentration [35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…One of the most group of common reagents for the photometric determination of cobalt is nitrosonaphthols [18,35,40]. Its sulphonated derivatives -1-nitroso-2-naphthol-3,6-disulfonic acid (nitroso-R-salt, NRS) and 2-nitroso-1-naphthol-4-sulfonic acid (nitroso-N-salt, NNS) -as well as their complexes with cobalt(III) are readily soluble in water.…”

Section: Introductionmentioning

confidence: 99%

Determination of Cobalt in Soils and Natural Waters Using Silica Gel Modified with Polyhexamethylene Guanidine and Nitroso-N-Salt

2018

AMSE

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Highly sensitive and simple method was developed for preconcentration and determination of trace amounts of cobalt in natural waters and soils using diffuse reflectance spectroscopy was developed. Method is based on the application of the new sorbent -silica gel sequentially modified with polyhexamethylene guanidine and 2-nitroso-1-naphthol-4-sulfonic acid sodium salt (nitroso-N-salt). Optimal conditions of solid-phase extraction of cobalt (II) such as stirring time, pH and volume of the solution, surface concentration of the reagent were determined. During sorption, intensively colored complex of cobalt (III) with nitroso-N-salt, that have a stripe in diffuse reflectance spectrum with maximum at 530 nm, was formed. Sorption-photometric method of cobalt determination directly in the sorbent phase by the color of its complex with nitroso-N-salt using diffuse reflectance spectroscopy was developed. The linearty of calibration curve depended on the surface concentration of nitroso-N-salt. For the surface concentration of nitroso-N-salt of 2.8 µmol g -1 the linearty was maintained in the concentration range of 0.05 -5.0 µg Co per 0.100 g of the sorbent, or 0.005 -0.50 µg mL -1 if the sorption was carried out from 10 mL of the solution. As the surface concentration of the reagent decreased, the range of linearty of the calibration curve narrowed. The detection limit was calculated as 0.01 μg per 0.100 g of the sorbent (or 1 ng mL -1 if the sorption was carried out from 10 mL of the solution) and didn't depend on the surface concentration of the reagent. Method was applied to the determination of cobalt in natural waters and soils. The accuracy of the results was confirmed by inductively coupled plasma optical emission spectroscopy and recovery test of spiked samples.In order to investigate desorption of the organic reagent SiO 2 -PHMG-NNS was treated with 0.001 -6.0 mol L -1 solutions of HCl, HNO 3 , or NaCl.

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“…A QAE Sephadex A 25 anion exchanger [10] and silica chemically modified with triphenylphosphonium groups [11] were used for the adsorption preconcen tration of a cobalt(III) complex with NRS and its sub sequent photometric determination. Adsorbents selective to cobalt were obtained by the immobiliza tion of NRS on an Amberlite CG 400 [12] anion exchanger and gels based on chitosan [13] and gelatin [14,15]. To attach NRS to a silica surface, we pro posed the preliminary modification of silica with poly(hexamethylene guanidine) (PHMG) [16].…”

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confidence: 99%

“…Adsorbents of different nature are widely used for the adsorption preconcentration and subsequent photometric determination of cobalt [9][10][11][12][13][14][15]. In determining cobalt in natural and process waters, it was extracted with a KB 4P 2 cation exchanger, treated with an NRS solution, and cobalt was determined by the color of its complex [9].…”

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confidence: 99%

Using silica modified by poly(hexamethylene guanidine) and nitroso-R-salt for the preconcentration and determination of cobalt

et al. 2015

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Nitrosonaphthols have long been known as organic reagents in inorganic analysis. They have found the widest application to the photometric determination of cobalt [1]. In the complex formation of cobalt(II) with 1 nitroso 2 naphthol and its isomer, 2 nitroso 1 naphthol, cobalt(II) is oxidized to cobalt(III) [2]. The neutral CoL 3 compounds formed are extracted with nonpolar solvents [1,3] or with hydrophobic adsorbents, for example, with С 16 silica [4]; the last named adsorbents are used for the preconcentration and separation of cobalt from other metals followed by its photometric determination. The introduction of sulfo groups into 1 nitroso 2 naphthol with the for mation of 1 nitroso 2 naphthol 3,6 disulfonic acid, nitroso R salt (NRS), offers a number of advantages, i.e., reduces the рК а of the hydroxyl group in compar ison to that of the not sulfonated analogue and enhances the solubility of the reagent and its com plexes in water.Procedures for the photometric determination of cobalt as its complex with nitroso R salt are suffi ciently specific but not very sensitive, like the proce dures using 1 nitroso 2 naphthol. To increase sensi tivity, analysts use preconcentration, namely, copre cipitation [5] or extraction in the presence of quaternary ammonium bases [6,7]. Two phase aque ous extraction systems based on polyethylene glycols were proposed in [8] for the thermal lens determina tion of cobalt.Adsorption preconcentration allows analysts to extract an analyte with a rather small portion of an adsorbent, to exclude the use of organic solvents, and is easy to perform. Adsorbents of different nature are widely used for the adsorption preconcentration and subsequent photometric determination of cobalt [9][10][11][12][13][14][15]. In determining cobalt in natural and process waters, it was extracted with a KB 4P 2 cation exchanger, treated with an NRS solution, and cobalt was determined by the color of its complex [9]. A QAE Sephadex A 25 anion exchanger [10] and silica chemically modified with triphenylphosphonium groups [11] were used for the adsorption preconcen tration of a cobalt(III) complex with NRS and its sub sequent photometric determination. Adsorbents selective to cobalt were obtained by the immobiliza tion of NRS on an Amberlite CG 400 [12] anion exchanger and gels based on chitosan [13] and gelatin [14,15]. To attach NRS to a silica surface, we pro posed the preliminary modification of silica with poly(hexamethylene guanidine) (PHMG) [16]. The adsorbent synthesis is simple and requires available reagents, which opens up a possibility of its wide appli cation.In this work we consider the use of silicas consecu tively modified with poly(hexamethylene guanidine) Abstract-An adsorbent based on silica consecutively modified with poly(hexamethylene guanidine) and nitroso R salt is proposed for the adsorption preconcentration and photometric determination of cobalt. The approach gives adsorbents with the controlled surface concentration of the reagent. The adsorbent extracts cobalt(II) from solutions...

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Photometric determination of aqueous cobalt (II), nickel (II), copper (II) and iron (III) with 1-nitroso-2-naphthol-3,6-disulfonic acid disodium salt in gelatin films

Abstract: All chemicals were of analytical reagent grade. Glassdistilled water was used throughout. Stock solution metal concentrations were estimated by titrimetry [29]

Cited by 14 publications

References 29 publications

Separation and Speciation of Iron Ions by Using Colorimetric Hydrogels

Separation and Speciation of Iron Ions by Using Colorimetric Hydrogels

Determination of Cobalt in Soils and Natural Waters Using Silica Gel Modified with Polyhexamethylene Guanidine and Nitroso-N-Salt

Using silica modified by poly(hexamethylene guanidine) and nitroso-R-salt for the preconcentration and determination of cobalt

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