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flotation spectrophotometric sensitive

Sensitive flotation-spectrophotometric method for the

Flotation-spectrophotometric methods have been described for the determination of noble metals, gold and rare earths [ 1 5]. These techniques are highly sensitive and provide molar absorptivities (e) of 2 x 1 0 5 1 × 1 0 6 1 m o l e cm -1. Lobinski and Marczenko [6] described for the first time a flotation-spectrophotometric method for the determination of vanadium using 3,5-dinitrocatechol and

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Sensitive flotation—spectrophotometric determination of

01/07/1979· Many highly sensitive, flotation spectrophotometric methods for determi- nation of various elements have been developed recently [4] . On shaking the aqueous solution with a slightly polar solvent the sparingly soluble ion associate precipitates at the phase boundary. After separation of the liquid phases, the precipitate can be dissolved in a polar solvent for absorbance measurements.

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Sensitive flotation-spectrophotometric determination of

01/04/1985· Some of the most sensitive spectrophotometric methods of gold determination yet reported are based on the extraction of ion-pairs of AuCl^ or AuBr^ with univalent basic dye cations,""17 the Rhodamine B method (s =9.7 x 104) being the best known; the determination with thio-Michler's ketone18'19 (e = 1.2 x 105) is slightly more sensitive. EXPERIMENTAL Reagents Gold(III) standard

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flotation spectrophotometric sensitive IPOAM

flotation spectrophotometric sensitive. Practical Methods for Plasma Lipoprotein Analysis . This chapter discusses the practical methods for plasma lipoprotein analysis. Changes in the concentration and sometimes in the nature of the plasma lipoproteins . Get Price; Pakistan Journal of Scientific and Industrial Research. Article ID Author Title Submission Date Status 2157 Muhammad Khawar Hayat

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Sensitive flotation-spectrophotometric determination of

A very flotation-spectrophotometric method based on the gold(III)/bromide/ tribromide/rhodamine 6G (R6G) system is described. In the presence of bromine, the dibromoderivative (R6G-Br) is formed. The gold compound is floated with di-isopropyl ether, washed with 1 M sulphuric acid and dissolved in methanol, and the absorbance of the solution is measured at 545 nm. The floated compounds is

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A sensitive and simple flotation-spectrophotometric

03/05/2008· A simple and sensitive spectrophotometric procedure for the determination of microgram amounts of silver has been developed. The method is based on the flotation of the complex of Schiff base, 2-[(2-mercaptophenylimino)methyl]phenol (MPMP), and silver at the aqueous solution-chloroform interface. The complex was then separated and dissolved in 5 mL of methanol, and its absorbance

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Sensitive flotation-spectrophotometric determination of

Sensitive flotation-spectrophotometric determination of gold, based on the gold(I)-iodide-methylene blue system. Marczenko Z(1), Jankowski K. Author information: (1)Department of Analytical Chemistry, Technical University, Warsaw, Poland. The gold(I)-iodide-Methylene Blue (MB) system is suitable for flotation separation and spectrophotometric determination of gold. Under the optimum conditions

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Sensitive flotation-spectrophotometric determination of

Sensitive flotation-spectrophotometric determination of osmium based on the osmium(IV)-chloride-rhodamine 6 G system. Authors; Authors and affiliations; Z. Marczenko; M. Balcerzak; H. Pasek ; Article. 44 Downloads; 10 Citations; Summary. Osmium separated by distillation as O s O 4 and absorbed in 8–10M HCl is converted into \(OsCl_6 ^{2 } \). When an acid solution (approx. 1M HCl

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Development of a sensitive spectrophotometeric method for

applications of some flotation techniques—a review, Talanta 37: 275–300. Chamsaz M, Hossein,i MS, Arbab MH (2002). Synergic flotation spectrophotometric iInvestigation of rare earth(III) ions with Alizarin and 1,10-phenanthroline, J. Colloid Interface Sci. 256: 472-476. Cundeva K, Stafilov T, Pavlovska G (2000). Flotation separation of

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Flotation-spectrophotometric determination of traces of

A simple, fast, reproducible and sensitive method for the flotation-spectrophotometric determination of Pb2+ is reported. The method is based on the ternary ion-association of Pb2+, xylenol orange (XO) and cetyltrimethylammonium bromide (CTAB) which is floated at interface of aqueous phase and n-hexane by shaking the separating funnel. By discarding the aqueous solution (the more dense phase

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Sensitive flotation-spectrophotometric determination of

Sensitive flotation-spectrophotometric determination of gold, based on the gold(I)-iodide-methylene blue system. Marczenko Z(1), Jankowski K. Author information: (1)Department of Analytical Chemistry, Technical University, Warsaw, Poland. The gold(I)-iodide-Methylene Blue (MB) system is suitable for flotation separation and spectrophotometric determination of gold. Under the optimum conditions

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Sensitive flotation-spectrophotometric determination of

A method of flotation separation with subsequent sensitive spectrophotometric determination of niobium is developed. In the presence of oxalate, niobium and 3,4-dinitrocatechol form an anionic complex able to associate with Rhodamine B (RB). The niobium compound is “floated” with cyclohexane, dissolved in acetone andthe absorbance of the solution is measured at 555 nm. Beer's law is obeyed

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Sensitive flotation-spectrophotometric determination of

Sensitive flotation-spectrophotometric determination of osmium based on the osmium(IV)-chloride-rhodamine 6 G system. Authors; Authors and affiliations; Z. Marczenko; M. Balcerzak; H. Pasek ; Article. 44 Downloads; 10 Citations; Summary. Osmium separated by distillation as O s O 4 and absorbed in 8–10M HCl is converted into \(OsCl_6 ^{2 } \). When an acid solution (approx. 1M HCl

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Sensitive flotation-spectrophotometric method for the

Sensitive flotation-spectrophotometric method for the determination of vanadium (IV) with 3,5-dinitrosalicylic acid and rhodamine B. Lata Mathew 1, M. L. P. Reddy 1, T. Prasada Rao 1, C. S. P. Iyer 1 & A. D. Damodaran 1 Fresenius' Journal of Analytical Chemistry volume 350, pages 180 181 (1994)Cite this article. 39 Accesses. 4 Citations. Metrics details. Abstract. Vanadium(IV) is

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Floatation-Spectrophotometric Determination of Thorium

A novel and sensitive floatation-spectrophotometric method is presented for determination of trace amounts of thorium in water samples. The method is based on the ion-associated formation between t...

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Separation via flotation, spectrophotometric speciation

An intense clear violet layer was formed after flotation, by adding an oleic acid (HOL) surfactant. The composition of the float was 1:1 [V(IV)]:[HMBPT]. A highly selective and sensitive spectrophotometric procedure was proposed for the determination of microamounts of V(IV) as its floated complex. The molar absorptivities of the V(IV)-HMBPT and V(IV)-HMBPT-HOL systems were 0.4 x 10(4) and 0

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Flotation-spectrophotometric determination of traces of

A simple, fast, reproducible and sensitive method for the flotation-spectrophotometric determination of Pb2+ is reported. The method is based on the ternary ion-association of Pb2+, xylenol orange (XO) and cetyltrimethylammonium bromide (CTAB) which is floated at interface of aqueous phase and n-hexane by shaking the separating funnel. By discarding the aqueous solution (the more dense phase

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Selective Flotation-Spectrophotometric Determination of

Selective Flotation-Spectrophotometric Determination of Trace Copper(II) in Natural Waters, Human Blood and Drug Samples Using Phenanthraquinone Monophenylthiosemicarbazone Magdi Ebrahiem KHALIFA, Magda Ali AKL,* and Shaban El-Sayed GHAZY Chemistry Department, Faculty of Science, Mansorua University, P.O. Box 70, Mansoura, Egypt. Received July 19, 2000; accepted February 19,

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Development of a sensitive spectrophotometeric method for

applications of some flotation techniques—a review, Talanta 37: 275–300. Chamsaz M, Hossein,i MS, Arbab MH (2002). Synergic flotation spectrophotometric iInvestigation of rare earth(III) ions with Alizarin and 1,10-phenanthroline, J. Colloid Interface Sci. 256: 472-476. Cundeva K, Stafilov T, Pavlovska G (2000). Flotation separation of

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Selective Flotation-Spectrophotometric Determination of

Request PDF Selective Flotation-Spectrophotometric Determination of Trace Copper(II) in Natural Waters, Human Blood and Drug Samples Using Phenanthraquinone Monophenylthiosemicarbazone. Copper

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