Development of a reliable analytical method for the precise extractive spectrophotometric determination of osmium(VIII) with 2-nitrobenzaldehydethiocarbohydrazone: Analysis of alloys and real sample

Zanje, Sunil B.; Kokare, Arjun N.; Suryavanshi, Vishal J.; Waghmode, Duryodhan P.; Joshi, Sunil S.; Anuse, Mansing A.

doi:10.1016/j.saa.2016.06.051

Cited by 9 publications

(4 citation statements)

References 26 publications

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“…After the oxidation process, the reaction compartment underwent three stages of tartar: with nitrogen gas to remove residual oxygen, with hydrogen (at least two hours to reduce any traces of osmium tetroxides), and then with nitrogen to remove residual hydrogen. The filtration characteristics of polypropylene hollow fiber membranes [56][57][58][59][60][61][62][63][64] ensured the complete retention of osmium nanoparticles in the reaction compartment which could be followed by established analytical techniques [74][75][76][77][78].…”

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confidence: 99%

Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes

et al. 2021

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Composite membranes play a very important role in the separation, concentration, and purification processes, but especially in membrane reactors and membrane bioreactors. The development of composite membranes has gained momentum especially through the involvement of various nanoparticles, polymeric, oxide, or metal, that have contributed to increasing their reactivity and selectivity. This paper presents the preparation and characterization of an active metal nanoparticle-support polymer type composite membrane, based on osmium nanoparticles obtained in situ on a polypropylene hollow fiber membrane. Osmium nanoparticles are generated from a solution of osmium tetroxide in tert-butyl alcohol by reduction with molecular hydrogen in a contactor with a polypropylene membrane. The composite osmium-polypropylene hollow fiber obtained membranes (Os-PPM) were characterized from the morphological and structural points of view: scanning electron microscopy (SEM), high resolution SEM (HR-SEM), energy dispersive spectroscopy analysis (EDAX), X-ray diffraction analysis (XRD), Fourier transform Infrared (FTIR) spectroscopy, thermal gravimetric analysis, and differential scanning calorimetry (TGA, DSC). The process performance was tested in a redox process of p-nitrophenol and 10-undecylenic (10-undecenoic) acid, as a target substance of biological or biomedical interest, in solutions of lower aliphatic alcohols in a membrane contactor with a prepared composite membrane. The characteristics of osmium nanoparticles-polypropylene hollow fiber membranes open the way to biological and biotechnological applications. These membranes do not contaminate the working environment, operate at relatively low temperatures, provide a large contact area between reactants, allow successive oxidation and reduction operations in the same module, and help to recover the reaction mass by ultrafiltration. The results obtained show that the osmium-polypropylene composite membrane allows the reduction of p-nitrophenol or the oxidation of 10-undecylenic acid, the conversion depending on the concentration in the lower aliphatic alcohol, the nature of the lower aliphatic alcohol, and the oxidant or reducing flow through the membrane contactor.

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confidence: 99%

Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes

et al. 2021

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“…An accurate, inexpensive and less laborious liquid-liquid extractive spectrophotometric procedure for the determination of zinc(II) in aqueous media has been developed [25]. Previously we have reported number of solvent extraction methods for the quantitative extraction of platinum group metals with amines [26][27][28][29][30][31][32][33][34][35][36][37][38][39]. In present research paper a systematic study of extraction of zinc(II) with N-n-heptylaniline in xylene has been carried out.…”

Section: Liquid-liquid Extraction Of Zinc(ii) From Acid Mediamentioning

confidence: 99%

Liquid- Liquid Extraction of Zinc(II) From Acid Media with N-N-Heptylaniline as an Extractant: Analysis of Pharmaceutical and Commercial Sample

GN¹

2018

BJSTR

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The extraction of zinc(II) from acid media by N-n-heptylaniline in xylene has been studied for metal distribution measurements. Various physicochemical parameters like acid concentration, reagent concentration, equilibrium time, effect of diluents, aqueous to organic phase ratio, stripping agents and loading capacity were investigated for the quantitative extraction. The extraction was carried out from 3 M hydrochloric acid and 0.5 M N-n-heptylaniline concentration. Zinc(II) was selectively extracted and separated from many metal ions and synthetic mixtures. The nature of the extracted species was determined. Zinc(II) was analyzed from pharmaceutical samples and nycil talk powder.

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“…The metal ions were estimated by standard methods. [51][52][53] The results are reported in Table-4. Furthermore, to evaluate the applicability of proposed method, the multi component synthetic mixtures were analyzed by employing recommended procedure.…”

Section: Applications Separation and Determination Of Palladium(ii) Fmentioning

confidence: 99%

Expeditious Extraction and Spectrophotometric Determination of Palladium (Ii) From Catalysts and Alloy Samples Using New Chromogenic Reagent

2017

RJC

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A simple, rapid and selective method has been developed for the extractive spectrophotometric determination of palladium(II) using 4-(4'-fluorobenzylideneimino)-3-methyl-5-mercapto-1, 2, 4-triazole, (FBIMMT). In hydrochloric acid medium palladium(II) instantly forms stable yellow colored 1:1 complex with FBIMMT at room temperature, which was well extracted in chloroform. The extracted palladium(II)-FBIMMT species showed absorption maximum at 390 nm against reagent blank. The molar absorptivity and Sandell's sensitivity of palladium(II)-FBIMMT in chloroform were found to be 5.404 × 10 3 L mol -1 cm -1 and 0.0196 µg cm -2 respectively. The Beer's law was obeyed up to 17.5 µg mL -1 of palladium(II). The optimal concentration range for maximum precision was evaluated from Ringbom's plot and was found to be 5 to 17.5 µg mL -1 . To establish the optimum extraction conditions; various experimental parameters such as acidity, reagent concentration, solvents, shaking time, interference of cations and anions have been studied. To determine accuracy and precision of proposed method, determinations were carried out at five identical aliquots. The selectivity of the method was enhanced by the use of masking agents. The stoichiometry of the extracted species was assessed by Job's method, mole ratio method and verified by log-log plot. The present method was successfully applied for the separation and determination of palladium(II) from binary mixtures, multi component synthetic mixtures, synthetic mixtures corresponding to alloys and catalyst.

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Development of a reliable analytical method for the precise extractive spectrophotometric determination of osmium(VIII) with 2-nitrobenzaldehydethiocarbohydrazone: Analysis of alloys and real sample

Cited by 9 publications

References 26 publications

Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes

Osmium Nanoparticles-Polypropylene Hollow Fiber Membranes Applied in Redox Processes

Liquid- Liquid Extraction of Zinc(II) From Acid Media with N-N-Heptylaniline as an Extractant: Analysis of Pharmaceutical and Commercial Sample

Expeditious Extraction and Spectrophotometric Determination of Palladium (Ii) From Catalysts and Alloy Samples Using New Chromogenic Reagent

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