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Kolekar, Sanjay S.; Anuse, Mansing A.

doi:10.1023/a:1021472231351

Cited by 9 publications

(11 citation statements)

References 11 publications

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“…Selenium(IV) and Au(III) were separated from germanium(IV) by extracting at 0.5 M hydrochloric acid solution with 4% N-n -octylaniline in xylene, while germanium(IV) remained in the aqueous phase (figure). Selenium(IV) was stripped from the organic phase with two 10 mL portions of 1 : 1 ammonia and was estimated by 4'-bromo PTPT [21], while Au(III) in the organic phase was stripped with ammonia buffer solution (pH 10.1) and estimated using the stannous chloride method [22]. Germanium(IV) in the aqueous phase was evaporated to moist dryness, adjusted to 9 M hydrochloric acid, and extracted with 3% N-n -octylaniline in xylene.…”

Section: Separation Of Germanium(iv) From Binary and Ternary Mixturesmentioning

confidence: 99%

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Solvent Extraction Separation of Germanium(IV) with N-n-Octylaniline As an Extractant

Sargar

Anuse

2005

J Anal Chem

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The extraction behavior of germanium(IV) from aqueous hydrochloric acid solution with N-n -octylaniline in xylene was investigated. Hydrochloric acid concentration higher than 9 M remained effective for quantitative extraction of germanium(IV). Phenylfluorone ion as a counter anion was used. More than 2% Nn -octylaniline provided quantitative extraction at 1 min equilibrium time and germanium(IV) was back extracted by 7 M ammonia. The method was free from the interference of a large number of metal ions and anions, except for Te(IV) and Sn(IV); this was avoided using the masking effect. Germanium(IV) was separated from associated elements in its binary mixture with Si(IV), Te(IV), Sb(III), Bi(III), Au(III), Cu(II), Zn(II), and its ternary mixture with Se(IV), Te(IV); Sb(III), Bi(III); and Au(III), Cu(II). The proposed method was applied to a synthetic sample containing associated metal ions. The results indicated that trace amounts of germanium(IV) could be separated effectively from higher amounts of other elements.

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Section: Separation Of Germanium(iv) From Binary and Ternary Mixturesmentioning

confidence: 99%

“…Germanium(IV) and Te(IV) remained unextracted in the aqueous phase. Selenium(IV) was stripped with 1 : 1 ammonia and estimated using the 4'-bromo PTPT method [21]. The aqueous phase, containing germanium(IV) and Te(IV), was evaporated to moist dryness.…”

Section: Separation Of Germanium(iv) From Binary and Ternary Mixturesmentioning

confidence: 99%

Solvent Extraction Separation of Germanium(IV) with N-n-Octylaniline As an Extractant

Sargar

Anuse

2005

J Anal Chem

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“…metal ions making use of their unequal solubilities in two immiscible liquid phases. [34][35][36][37][38] In our earlier work, we have reported the liquid-liquid extraction of palladium(II) with high molecular weight amine (HMWA) such as N-n-octylaniline from hydrochloric acid 34 and salicylate medium. Very recently, a new class of solvents, namely switchable solvents, has also been developed for the extraction as they facilitate economically competitive and environmentally conscious views and can be removed from products without distillation.…”

Section: Introductionmentioning

confidence: 99%

“…Different types of solvents have been employed for extraction of specic species. 38 It was found that both the procedures require higher extractant concentration to extract palladium(II) quantitatively from the aqueous phase, and also stripping of palladium(II) from the organic phase required a higher concentration of NH 3 solution. [3][4][5][6][7] Specically, solvent extraction is a suitable method for removal of PGMs from low concentrated sources, because it offers a number of advantages like high selectivity and metal purity.…”

Section: Introductionmentioning

confidence: 99%

2-Octylaminopyridine assisted solvent extraction system for selective separation of palladium(ii) ion-pair complex from synthetic mixtures and real samples

Suryavanshi

Pawar²,

Anuse

et al. 2015

Anal. Methods

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Herein, 2-octylaminopyridine (2-OAP) amine is used in the liquid-liquid extraction of palladium(II) from aqueous salicylate media. It is found that pH does not affect the metal extraction process in the pH range of 1.8-2.4. Palladium(II) complex formation was verified by a log-log plot, whereas from the slope analysis, the ion pair complex stoichiometry 1 : 1 (metal : ligand) and 1 : 3 (metal : acid) was confirmed. The extraction system was optimized for the choice of diluent (xylene) as well as for the effective stripping agent (5.0 M ammonia). The selectivity for palladium(II) was found to be maintained when the organic phase (0.03 M 2-OAP in xylene) is used to extract the palladium(II). The extraction saturation capacity of palladium(II) was determined from 0.02 M sodium salicylate solution with 10 mL 0.03 M 2-OAP, and its experimental value exceeds 2.5 mg under the experimental conditions. Stripping of palladium(II) from the loaded organic phase was performed with 5.0 M ammonia. The extraction with varying parameters like equilibrium time, temperature, diluents, concentration of extractant, loading capacity, regeneration power and stability of extraction was also studied. The extraction behavior of associated metals, namely, noble metals and base metals, has been investigated, and the conditions for binary separation involving these metal ions have been optimized. Based on the extraction protocol, palladium(II) has been recovered from real samples.

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“…In most of the cases they behave as unidentate ligand by complexation through 'S' atoms of the thiol groups. We have reported from this laboratory, the derivatives of pyrimidine-2-thiol have been successfully employed for the extractive spectrophotometric determination of platinum group metals [38], gold(III) [37,39,40], tellurium(IV) [41,42], bismuth(III) [43], selenium(IV) [44]. A major feature of these reagents was their high selectivity for transition and non transition metal ions.…”

Section: Introductionmentioning

confidence: 99%

Synergistic extraction and spectrophotometric determination of copper(II) using 1-(2′,4′-dinitro aminophenyl)-4,4,6-trimethyl-1,4-dihydropyrimidine-2-thiol: Analysis of alloys, pharmaceuticals and biological samples

Kamble¹,

Kolekar²,

Anuse³

2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Untitled

Cited by 9 publications

References 11 publications

Solvent Extraction Separation of Germanium(IV) with N-n-Octylaniline As an Extractant

Solvent Extraction Separation of Germanium(IV) with N-n-Octylaniline As an Extractant

2-Octylaminopyridine assisted solvent extraction system for selective separation of palladium(ii) ion-pair complex from synthetic mixtures and real samples

Synergistic extraction and spectrophotometric determination of copper(II) using 1-(2′,4′-dinitro aminophenyl)-4,4,6-trimethyl-1,4-dihydropyrimidine-2-thiol: Analysis of alloys, pharmaceuticals and biological samples

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