Sorption preconcentration in combined methods for the determination of noble metals

Mokhodoeva, O. B.; Myasoedova, G. V.; Кубракова, И. В.

doi:10.1134/s1061934807070027

Cited by 39 publications

(9 citation statements)

References 131 publications

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“…Inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) are the most common methods for determination of trace precious metals in complex geological samples. To improve the selectivity and sensitivity of determination, solid-phase extraction (SPE) of precious metals is widely used prior to their subsequent ICP-OES and ICP-MS determination [1][2][3][4]. The main conditions for development of SPE procedure before ICP-OES and ICP-MS determination are quantitative recovery of the analytes from solutions and their quantitative elution from the adsorbent surface.…”

Section: Introductionmentioning

confidence: 99%

Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

Лосев

Парфенова

Elsuf’ev

et al. 2019

Separation Science and Technology

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Silica gel chemically modified with dithiocarbamate groups (DTCS) was used for separation and preconcentration of precious metals and their subsequent determination in geological samples and their processing products by inductively coupled plasma optical emission spectrometry and inductively coupled plasma mass-spectrometry. DTCS was characterized by TGA/DSC, FT-IR, and CHNS-analysis. DTCS quantitatively extracted Au 3+ , Pd 2+ , Pt 2+ , Pt 4+ at 20°C from 0.5-4.0 M HCl media and Rh 3+ , Ir 4+ , Ru 4+ ,Os 4+ at 95°C in the presence of 0.025M SnCl 2. Two-column procedure was proposed to separate precious metals from matrix components and to separate kinetically inert precious metals from kinetically labile ones.

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Section: Introductionmentioning

confidence: 99%

Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

Лосев

Парфенова

Elsuf’ev

et al. 2019

Separation Science and Technology

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“…In this context, research on a new, simple and rapid synthesis alternative remains a priority. One of these alternatives consists in the sorption of specific organic chelating reagents on the conventional ion exchangers [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Macroporous anion exchanger purolite A-500 loaded with ferron for palladium(II) recovery

Bı̂lbă

Păduraru

Tofan

2010

JICS

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A systematic study on interaction of Pd(II) with 7-iodo-8-hydroxyquinoline-5 sulfonic acid (Ferron) and the strongly basic anion exchange resin Purolite A-500 in its chloride form was carried out. It was found that for Ferron/resin ratio ranging from 0.15 to 0.70 mmol g -1 , the retention of chelating reagent on the investigated ion exchanger is practically quantitative. The sorption increase of Pd(II) on Ferron-loaded resin was observed for higher values of parameters like: pH solution, initial concentration and temperature. It was observed that the equilibrium distribution of Pd(II) between sorbent and solution could adequately be described by the Langmuir model with two parameters. The thermodynamic quantities characteristic of Pd(II) sorption process ('G = -18.4 kJ mol -1 ; ǻH = 11.7 kJ mol -1 ; ǻS = 104.4 J mol -1 K -1 ) suggest a strong affinity between Ferron-loaded resin and the tested cation.

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“…In this respect, much attention has been drawn to the synthesis of novel chelating resins and the investigation of their adsorption properties 1–6. In general, chelating resins are prepared by the anchoring of complexing groups onto a solid support, such as a silica gel, cellulose, or macroporous copolymers 7. Among the aforementioned solid supports, styrene–divinylbenzene copolymer has been used most widely because of its good physical and chemical properties, such as its porosity, high surface area, durability, and purity 8.…”

Section: Introductionmentioning

confidence: 99%

Adsorption properties of novel chelating resins containing 2‐amino‐5‐methylthio‐1,3,4‐thiadizole and hydrophilic spacer arms for Hg²⁺ and Ag⁺

Wang¹,

Ji²,

Meng³

et al. 2009

J of Applied Polymer Sci

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The adsorption properties, including the adsorption kinetics, adsorption isotherms, and adsorption selectivity, of newly formed chelating resins that contained a heterocyclic functional group and a hydrophilic spacer arm of poly(ethylene glycol) [polystyrene-diethylene glycol-2-amino-5-methylthio-1,3,4-thiadizole (PS-DEG-AMTZ) and polystyrene-triethylene glycol-2-amino-5methylthio-1,3,4-thiadizole (PS-TEG-AMTZ)] were studied in detail. The results show that the adsorption kinetics of PS-DEG-AMTZ and PS-TEG-AMTZ for Hg 2þ and Ag þ could be described by a pseudo-second-order rate equation. The introduction of a spacer arm between the polymeric matrix and functional group was beneficial for increasing the adsorption rates. The apparent activation energies of the resins for Hg 2þ and Ag þ were within 20.89-32.32 kJ/mol. The Langmuir model could describe the isothermal process of Hg 2þ and Ag þ . The competitive adsorption of the resins for Hg 2þ and Ag þ in binary mixture systems was also investigated. The results show that Hg 2þ and Ag þ were adsorbed before the other metal ions, such as Cu 2þ , Zn 2þ , Fe 3þ , Cd 2þ , and Pb 2þ , under competitive conditions. Five adsorption-desorption cycles were conducted for the reuse of the resins. The results indicate that these two resins were suitable for reuse without considerable changes in the adsorption capacity.

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Sorption preconcentration in combined methods for the determination of noble metals

Cited by 39 publications

References 131 publications

Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

Macroporous anion exchanger purolite A-500 loaded with ferron for palladium(II) recovery

Adsorption properties of novel chelating resins containing 2‐amino‐5‐methylthio‐1,3,4‐thiadizole and hydrophilic spacer arms for Hg²⁺ and Ag⁺

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Sorption preconcentration in combined methods for the determination of noble metals

Cited by 39 publications

References 131 publications

Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

Separation and preconcentration followed by ICP-OES and ICP-MS determination of precious metals using silica gel chemically modified with dithiocarbamate groups

Macroporous anion exchanger purolite A-500 loaded with ferron for palladium(II) recovery

Adsorption properties of novel chelating resins containing 2‐amino‐5‐methylthio‐1,3,4‐thiadizole and hydrophilic spacer arms for Hg2+ and Ag+

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Adsorption properties of novel chelating resins containing 2‐amino‐5‐methylthio‐1,3,4‐thiadizole and hydrophilic spacer arms for Hg²⁺ and Ag⁺